According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2007 GMC Sierra 1500 has 17 documented known issues, with 5 rated critical. The most serious are P0016 — Crank/Cam Correlation Fault from Stretched Timing Chain on 5.3L AFM V8 ($150-$1,800 repair), P0700 — Transmission Fault Flag from Failing 6L80/6L90 Internal TEHCM ($600-$2,500 repair), 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear ($1,800-$3,500 repair), Fuel Pump Module Failure Causing No-Start or Stalling ($500-$1,200 repair) and Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure ($800-$2,500 repair). Across all issues with published estimates, repair costs range from $20 to $3,500. DIY maintenance guides at au7o.io.
SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING: LAMP
General Motors, LLC (GM) is recalling certain 2023 Chevrolet Silverado 1500, GMC Sierra 1500, 2023-2024 Chevrolet Tahoe, Suburban, GMC Yukon, Yukon XL, Cadillac Escalade, and Escalade ESV vehicles. The electronic brake control module software may fail to display a warning light when a loss of brake fluid occurs. As such, these vehicles fail to comply with the requirements of Federal Vehicle Safety Standard number 135, "Light Vehicle Brake Systems."
Campaign #24V67400012/09/2024
EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
General Motors, LLC (GM) is recalling certain 2020-2023 Cadillac CT4 and CT5; 2021-2023 Buick Envision; and 2022-2023 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles. The daytime running lights (DRLs) may not deactivate when the headlights are on. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
Campaign #22V90300008/12/2022
ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
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What are the most common GMC Sierra 1500 problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2007 GMC Sierra 1500 has 17 documented issues. The most frequently reported are: P0016 — Crank/Cam Correlation Fault from Stretched Timing Chain on 5.3L AFM V8, P0700 — Transmission Fault Flag from Failing 6L80/6L90 Internal TEHCM, 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear. Of these, 5 are rated critical and should be addressed promptly.
Is the GMC Sierra 1500 reliable?
The 2007 GMC Sierra 1500 has 17 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 5 issues are rated critical: P0016 — Crank/Cam Correlation Fault from Stretched Timing Chain on 5.3L AFM V8 and P0700 — Transmission Fault Flag from Failing 6L80/6L90 Internal TEHCM and 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear and Fuel Pump Module Failure Causing No-Start or Stalling and Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common GMC Sierra 1500 problems?
Repair costs for known GMC Sierra 1500 issues range from $20 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, P0016 — Crank/Cam Correlation Fault from Stretched Timing Chain on 5.3L AFM V8, typically costs $150-$1,800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2007-2021 GMC Sierra 1500 P0016 — Crank/Cam Correlation Fault from Stretched Timing Chain on 5.3L AFM V8?
P0016 means the crankshaft and Bank 1 intake camshaft are out of sync beyond tolerance. On the 5.3L V8 Sierra 1500 this is a signature failure because of two engine-specific problems: (1) the timing chain stretches over time — accelerated by AFM lifter debris and extended oil-cha… Repairs typically run $150-$1,800. Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
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When Issues Typically Appear
Upper Dash Pad Cracking and Interior Panel Failure in Sun-Exposed GMT800/GMT900 Trucks
40K-150K
Blend Door / HVAC Actuator Failure Causing Clicking Behind Dash and Incorrect Air Temperature or Mode
50K-180K
Fuel Level Sensor Failure Causing Erratic or Inoperative Gas Gauge
50K-140K
Stepper Motor Instrument Cluster Failure Causing Inaccurate Gauges
50K-150K
Front Hub Bearing Assembly Failure Causing ABS Activation, Noise, and Wheel Play
60K-150K
Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure
70K-200K
Power Door Lock Actuator Failure Causing Intermittent or Inoperative Locking
70K-160K
Fuel Pump Module Failure Causing No-Start or Stalling
80K-180K
4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear
90K-180K
050K100K150K200K mi
On the 2007-2018 GMC Sierra 1500, p0700 itself is only a flag: the Transmission Control Module has stored one or more transmission faults and is requesting the MIL. On Sierra 1500s with the 6L80 (and 6L90 on heavier variants) 6-speed automatic, the notable design issue is that the TCM is integrated into the valve body as a TEHCM (transmission electro-hydraulic control module), bolted inside the pan and sitting in 180-250°F fluid. Repeated heat cycling degrades the module and its integrated pressure switches and solenoids. When the TEHCM or a shift/pressure-control solenoid begins to fail, it sets specific sub-codes (e.g., P2534, P0742, P0761) plus the umbrella P0700, and the truck can exhibit harsh or missed shifts, slipping, or limp mode. Critically, on the 6L80/6L90 the solenoids are over-molded into the non-serviceable TEHCM and generally can't be replaced individually.
P0700 alone is not actionable — pull the transmission-specific sub-codes with a capable scanner to find the real fault. Check fluid level/condition first. Repairs commonly involve replacing the TEHCM/valve body assembly (solenoids are integrated and non-serviceable) and re-learning shift adaptives; the new TEHCM must be programmed to the VIN. Address any fluid overheating cause to prevent recurrence.
On the 2000-2007 GMC Sierra 1500, on GMT800 Sierra 1500 trucks equipped with the 4L60-E family automatic, a well-known internal failure is cracking or stripping of the reaction sun shell. Owners commonly report sudden loss of reverse, no 2nd gear, no 4th gear, or a truck that starts in 3rd gear after a bang or flare. This is widely documented in transmission rebuild literature, repair databases, and owner reports for GM trucks and SUVs using this transmission.
Diagnosis usually starts with verifying gear loss patterns, checking line pressure, and scanning for ratio/performance codes before condemning the unit. Repair requires transmission removal and overhaul or replacement, typically installing an upgraded hardened sun shell such as the commonly recommended 'Beast' style shell along with inspection of clutches, band, pump, and valve body wear items.
On the 2007-2021 GMC Sierra 1500, p0016 means the crankshaft and Bank 1 intake camshaft are out of sync beyond tolerance. On the 5.3L V8 Sierra 1500 this is a signature failure because of two engine-specific problems: (1) the timing chain stretches over time — accelerated by AFM lifter debris and extended oil-change intervals — retarding cam timing until correlation exceeds threshold; and (2) the cam actuator (VVT) solenoid or phaser sticks. The AFM V8s are also known for oil consumption, and low/dirty oil starves the phasers and clogs solenoid screens, which both triggers P0016 and worsens chain wear. This is more serious than the related P0011: a severely stretched chain can jump a tooth and cause piston-to-valve contact, so continued driving is risky.
Check oil level/condition first — low or sludged oil alone can set it. Use a scan tool to read cam-retard/phaser data. If the timing chain is stretched (confirmed by measuring cam retard or valve-cover inspection), replace the timing chain, guides, tensioner, and cam phaser/sprocket; if only the VVT solenoid is stuck, replace it. Address AFM oil consumption to prevent recurrence.
What you need to diagnose it
The repair instructions explicitly call for reading stored codes. Use a scanner that can read the named code families before choosing a repair.The recommended scanner supports these code families; confirm your exact year, model and module coverage before buying.
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Reading and clearing the code is DIY work. Module replacement or reprogramming is not — most modules are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
On the 2007-2022 GMC Sierra 1500, p0011 means the Bank 1 intake camshaft is timed more advanced than the ECM commanded — the phaser is stuck/biased advanced. On the Sierra 1500 5.3L/6.2L, the dominant cause is a VVT (camshaft actuator) solenoid whose internal screen has clogged with oil sludge or AFM debris, jamming the plunger so oil pressure to the phaser can't be modulated. GM acknowledges sticking/binding solenoids in PIs such as PIP5130K and PIP5855. Low or incorrect-viscosity oil is a very common trigger, so oil condition is always checked first. Because AFM lifter wear sheds metal into the oil, that debris circulates and clogs the solenoid screens — tying P0011 directly to the trucks' oil-consumption reputation. Drivers report rough running, and in worse cases stalling when slowing to a stop.
Check engine oil level, viscosity, and condition first; an oil/filter change with correct-spec oil sometimes clears it. A proven test is swapping the Bank 1 intake solenoid with another solenoid — if the code follows to P0014/P0021, the solenoid is bad. Replace the VVT/cam actuator solenoid (roughly $40-$90 part). If the phaser or timing chain is worn, the timing set must be replaced.
On the 2000-2007 GMC Sierra 1500, a common GMT800 Sierra problem is failure of the in-tank fuel pump module, often from worn pump motors or failed level-sender/module electronics. Owners report long crank, hard starting, loss of power under load, or sudden stall/no-start conditions, especially as mileage climbs. This issue is widely documented in owner forums and complaint databases across 4.3L, 4.8L, 5.3L, and 6.0L trucks.
fuel gauge may act erratically if sender/module is failing
whining noise from fuel tank
How to Fix
Diagnosis usually starts with checking fuel pressure at the rail and verifying pump prime at key-on. Low or unstable pressure, especially after sitting, points to a weak pump or failing module. Repair is replacement of the complete fuel pump module and, ideally, the fuel filter on applicable years; corroded electrical connectors at the tank should also be inspected and replaced if heat-damaged.
On the 2003-2007 GMC Sierra 1500, a very common GMT800 complaint is sulfur contamination and wear of the fuel level sensor contacts inside the tank module, causing the gauge to read empty, full, or fluctuate unpredictably. Owners often see a low-fuel warning with plenty of fuel in the tank or watch the gauge drop suddenly while driving. GM issued service information and special coverage on many trucks for this exact condition.
Confirm the issue by comparing scan-tool fuel level data and observing whether the sender reading jumps erratically. The usual repair is replacement of the fuel level sensor or, more commonly, the entire fuel pump module assembly because of labor overlap and the age of the pump. Connector condition and ground integrity should also be checked during service.
On the 1999-2007 GMC Sierra 1500, corrosion of steel brake lines is a major safety issue on older Sierra 1500 trucks, especially in salt-belt states. Owners report the brake pedal suddenly dropping to the floor when a rusted line bursts during normal braking, often near the ABS module or along the frame rails. The problem is heavily documented in NHTSA complaints and repair forums for GMT800 trucks and related GM full-size pickups.
Inspect all hard brake lines from the master cylinder/ABS module to the rear axle and front calipers, paying close attention to flaking rust and wet spots. Spot repairs may buy time, but many owners end up replacing the full line set with pre-bent stainless or coated steel lines because multiple sections are usually compromised. After replacement, the system must be properly bled, including ABS bleed procedures when needed.
On the 2007-2018 GMC Sierra 1500, p0430 is the Bank 2 counterpart to P0420 and, on the Sierra 1500 V8, points to the driver-side (Bank 2) catalytic converter falling below efficiency threshold. The mechanism is identical to Bank 1: the rear O2 sensor voltage begins mirroring the front sensor, so the ECM concludes that bank's cat can no longer store/release oxygen. The specific pattern on these trucks is that the underlying killer is usually AFM-related oil consumption or a lazy/aged rear O2 sensor rather than a defective converter out of the box. Owners commonly report P0430 (or both P0420 and P0430) returning even after installing new aftermarket converters — a well-documented frustration on GM-Trucks and SilveradoSierra forums — because the root cause (oil burning, exhaust leak, or a slow O2 sensor) was never corrected.
Confirm with a smoke/leak check and O2 sensor live-data (rear sensor should be lazy/flat, not switching). Rule out driver-side manifold bolt leaks. Replace a lazy Bank 2 rear O2 sensor first if indicated. If the converter is confirmed inefficient, fit an OEM/CARB-compliant direct-fit unit and fix any oil consumption; expect aftermarket cats to re-trigger if the AFM oil burn persists.
On the 2007-2017 GMC Sierra 1500, on the 5.3L V8 Sierra 1500, P0420 sets when the downstream (post-cat) O2 sensor tracks the upstream sensor too closely, meaning the Bank 1 catalytic converter is no longer scrubbing exhaust efficiently. The distinctive part on these trucks: the converter frequently dies prematurely from an upstream cause rather than age. Active Fuel Management (AFM) V8s burn oil past the lifters/rings, and that oil ash slowly poisons the catalyst substrate. GM TSB #16-NA-111 also documents a lesser-known trigger: a poor air-filter-housing seal lets abrasive dirt bypass the filter, wearing the O2 sensors and clogging the cat from the inside. Broken exhaust manifold bolts (a chronic GM V8 issue) create leaks that mimic P0420. Aftermarket cats have a poor track record here and often re-trigger the code within months.
Do not blindly replace the converter. First scan for exhaust leaks (check manifold bolts), inspect the air-filter housing per TSB 16-NA-111, and check upstream/downstream O2 sensor operation with live data. Address AFM oil consumption if present. If the converter is genuinely spent, install an OEM or high-quality direct-fit unit and complete the heat-cycle break-in before the monitor re-runs.
On the 2007-2018 GMC Sierra 1500, p0442 on the Sierra 1500 is a small EVAP leak detected during the ECM's key-off/idle vacuum test. On these trucks the two most common real-world causes are a loose, worn, or cracked gas cap seal (the cheapest fix and always the first check) and — a documented GM issue (TSB 15-NA-019) — the fuel tank filler vent hose connector cracking, which allows vapor to escape and sets P0442 (and sometimes P0455). The vent hose fracture is addressed by replacing the vent hose assembly (part No. 22802073 on 2013-2015 models). The EVAP purge valve (engine bay) and vent solenoid (near the tank) can also weep. Drivers often notice a faint fuel odor and the CEL, with no drivability change.
Start with the gas cap — inspect the seal and tighten/replace with OEM. If the code persists, perform a smoke test to pinpoint the leak; inspect the fuel filler vent hose connector for cracks and replace the vent hose assembly if fractured. Replace the purge or vent solenoid if the smoke test isolates it there.
On the 2007-2023 GMC Sierra 1500, p0455 indicates a large (gross) EVAP leak — the ECM cannot pull or hold vacuum in the evaporative system at all. On the Sierra 1500 the classic causes are a completely missing/unsealed gas cap, a stuck-open or failed EVAP vent solenoid (mounted under the truck near the fuel tank/spare tire, where it's exposed to road spray, dirt, and corrosion), and a cracked or disconnected vapor/vent hose. Because the vent solenoid sits at the canister under the bed, water intrusion and corrosion cause it to stick open, which the ECM reads as a wide-open system; a tell-tale symptom is the fuel nozzle repeatedly clicking off during refueling. The filler vent hose connector fracture noted in GM literature can also escalate to P0455. Symptom-wise the driver usually sees only the CEL, sometimes a fuel smell, and no performance loss.
Confirm the gas cap is present and sealing. Smoke-test the EVAP system to find the large leak. The most common repair on these trucks is replacing the under-body EVAP vent solenoid/valve at the canister; also inspect and replace cracked vapor lines and the fuel filler vent hose. Clear codes and run the EVAP monitor to confirm.
On the 2000-2013 GMC Sierra 1500, sierra owners across both GMT800 and GMT900 generations frequently report small electric HVAC actuators stripping internal gears or losing calibration. The result is a repetitive clicking or tapping noise from the dash, air stuck on defrost or floor, or one side blowing hot while the other blows cold. This is one of the most common non-drivetrain complaints on these trucks and is heavily documented in owner forums and repair databases.
Diagnosis is done by commanding HVAC modes and temperatures while listening for actuator chatter and verifying door movement with a scan tool or visual inspection where accessible. Repair involves replacing the failed mode, blend, or recirculation actuator and then performing HVAC recalibration by fuse pull or scan-tool procedure depending on year and system configuration.
On the 2007-2013 GMC Sierra 1500, owners of 2007-2013 Sierra 1500 trucks commonly report the upper dash cracking near the passenger airbag area and around defrost vents, especially in hot climates. While primarily a cosmetic and rattling issue, some owners also complain that broken plastic edges and loose pieces worsen over time. The problem is widely discussed in owner communities for GMT900 GM trucks and appears repeatedly in complaint databases.
Common Symptoms
cracked dashboard
rattles from dash area
broken plastic near passenger airbag
sun-damaged interior trim
loose dash pieces
How to Fix
Inspect for cracks around the passenger-side airbag opening, center speaker area, and defrost vent corners. Repair options include replacing the dash pad, installing a molded dash cap, or using plastic repair methods for minor cracks; replacement is the most durable but also the most labor-intensive and expensive option.
On the 2007-2013 GMC Sierra 1500, gMT900 Sierra trucks are well known for failing door lock actuators, often starting with one door that unlocks weakly or only works intermittently before additional doors fail. Owners report the key fob cycling the locks while one or more doors remain stuck, requiring manual operation from inside. The issue is heavily documented across GM full-size truck forums and complaint records.
Common Symptoms
door will not lock or unlock with key fob
weak buzzing from inside door
intermittent power lock operation
one or more doors stuck locked
manual lock works but power lock does not
How to Fix
Diagnosis involves confirming power and ground at the latch/actuator assembly and ruling out broken door-jamb wiring or BCM command issues. The usual fix is replacement of the failed actuator or latch-actuator assembly in the affected door, followed by checking all doors because multiple actuators often fail within a similar time period.
On the 2003-2007 GMC Sierra 1500, 2003-2007 Classic-era Sierra trucks are well known for instrument cluster gauge failures caused by defective stepper motors and, in some cases, backlighting issues. Speedometer, tachometer, oil pressure, fuel, voltage, and coolant gauges can stick, read wildly high or low, or stop moving entirely. The problem became widespread enough that GM issued a special coverage adjustment on many trucks and SUVs using the same cluster design.
Verify actual vehicle data with a scan tool or GPS speed app to confirm the cluster is inaccurate rather than the sending unit. Repair is typically cluster removal and professional rebuild with updated stepper motors and bulbs, or replacement with a remanufactured unit programmed for the vehicle. If only one gauge is wrong, the whole cluster is still usually rebuilt because the remaining motors often fail later.
On the 1999-2013 GMC Sierra 1500, front wheel hub bearing assemblies on Sierra 1500 trucks commonly wear out, especially on 4WD models and trucks used with larger tires or in rough conditions. Owners report humming or growling that changes with speed, looseness in the front wheel, and in some cases ABS warnings or low-speed ABS activation because the wheel speed sensor is integrated into the hub. This is a frequent repair item across both GMT800 and GMT900 generations.
Diagnosis involves checking for wheel play with the tire off the ground, listening for bearing noise during road tests, and comparing wheel speed sensor data if ABS symptoms are present. Repair is replacement of the affected hub assembly, and many owners replace both sides if mileage is high. Corrosion at the sensor mounting surfaces and wiring damage should also be addressed to prevent repeat ABS issues.
On the 2007-2019 GMC Sierra 1500, on the Sierra 1500, P0128 means the coolant did not reach the expected regulating temperature within the time/airflow the ECM predicted — almost always a thermostat stuck open (or partly open) so the engine runs too cool. The GM thermostat on the 5.3L/6.2L is integrated into a plastic housing on the engine, and the common failure is the thermostat losing its ability to close, letting coolant circulate continuously. Drivers notice the temp gauge sitting low, weak or slow-to-warm cabin heat (especially in winter), and worse fuel economy because the ECM stays in open-loop enrichment longer. A stuck-open thermostat is by far the most frequent cause; a failed/biased coolant temperature sensor is the secondary suspect and should be verified with live data before parts are thrown at it.
Verify actual coolant temperature with a scan tool vs. the gauge to separate a bad ECT sensor from a bad thermostat. If the engine won't reach ~195-210°F, replace the thermostat (and housing/gasket, commonly sold as an assembly) with an OEM-spec unit and refill/bleed the cooling system. Replace the ECT sensor if data shows an implausible reading.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
Engine Coolant Thermostat
Cross-refTHRGM-0002
Fitment confirmed against the ShowMeTheParts catalog for this vehicle's year and engine.
General Motors LLC (GM) is recalling certain 2021-2024 Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, and Tahoe, GMC Sierra 1500, Yukon, and Yukon XL vehicles equipped with a 6.2L V8 gas engine. The connecting rod and/or crankshaft engine components may have manufacturing defects that can lead to engine damage and engine failure.
Campaign #25V27400024/04/2025
SEAT BELTS
General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.
Campaign #20V79200017/12/2020
SEAT BELTS
General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.
What is the 2007-2018 GMC Sierra 1500 P0700 — Transmission Fault Flag from Failing 6L80/6L90 Internal TEHCM?
P0700 itself is only a flag: the Transmission Control Module has stored one or more transmission faults and is requesting the MIL. On Sierra 1500s with the 6L80 (and 6L90 on heavier variants) 6-speed automatic, the notable design issue is that the TCM is integrated into the valve… Repairs typically run $600-$2,500. Severity: high.
What is the 2000-2007 GMC Sierra 1500 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear?
On GMT800 Sierra 1500 trucks equipped with the 4L60-E family automatic, a well-known internal failure is cracking or stripping of the reaction sun shell. Owners commonly report sudden loss of reverse, no 2nd gear, no 4th gear, or a truck that starts in 3rd gear after a bang or fl… Repairs typically run $1,800-$3,500. Severity: high.
What is the 2000-2007 GMC Sierra 1500 Fuel Pump Module Failure Causing No-Start or Stalling?
A common GMT800 Sierra problem is failure of the in-tank fuel pump module, often from worn pump motors or failed level-sender/module electronics. Owners report long crank, hard starting, loss of power under load, or sudden stall/no-start conditions, especially as mileage climbs. Repairs typically run $500-$1,200. Severity: high.
What is the 1999-2007 GMC Sierra 1500 Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure?
Corrosion of steel brake lines is a major safety issue on older Sierra 1500 trucks, especially in salt-belt states. Owners report the brake pedal suddenly dropping to the floor when a rusted line bursts during normal braking, often near the ABS module or along the frame rails. Th… Repairs typically run $800-$2,500. Severity: high.
What is the 2007-2018 GMC Sierra 1500 P0430 — Catalyst Efficiency Bank 2 (Driver-Side) Converter Failure on 5.3L V8?
P0430 is the Bank 2 counterpart to P0420 and, on the Sierra 1500 V8, points to the driver-side (Bank 2) catalytic converter falling below efficiency threshold. The mechanism is identical to Bank 1: the rear O2 sensor voltage begins mirroring the front sensor, so the ECM concludes… Repairs typically run $400-$1,500. Severity: medium.
What is the 2007-2022 GMC Sierra 1500 P0011 — Intake Cam Over-Advanced from Sludge-Clogged VVT Solenoid on 5.3L V8?
P0011 means the Bank 1 intake camshaft is timed more advanced than the ECM commanded — the phaser is stuck/biased advanced. On the Sierra 1500 5.3L/6.2L, the dominant cause is a VVT (camshaft actuator) solenoid whose internal screen has clogged with oil sludge or AFM debris, jamm… Repairs typically run $40-$450. Severity: medium.
What is the 2007-2017 GMC Sierra 1500 P0420 — Catalyst Efficiency Bank 1 from Failing Cat, Often Caused by AFM Oil Consumption or Air-Box Debris?
On the 5.3L V8 Sierra 1500, P0420 sets when the downstream (post-cat) O2 sensor tracks the upstream sensor too closely, meaning the Bank 1 catalytic converter is no longer scrubbing exhaust efficiently. The distinctive part on these trucks: the converter frequently dies premature… Repairs typically run $400-$1,500. Severity: medium.
What is the 2000-2013 GMC Sierra 1500 Blend Door / HVAC Actuator Failure Causing Clicking Behind Dash and Incorrect Air Temperature or Mode?
Sierra owners across both GMT800 and GMT900 generations frequently report small electric HVAC actuators stripping internal gears or losing calibration. The result is a repetitive clicking or tapping noise from the dash, air stuck on defrost or floor, or one side blowing hot while… Repairs typically run $150-$700. Severity: medium.
What is the 1999-2013 GMC Sierra 1500 Front Hub Bearing Assembly Failure Causing ABS Activation, Noise, and Wheel Play?
Front wheel hub bearing assemblies on Sierra 1500 trucks commonly wear out, especially on 4WD models and trucks used with larger tires or in rough conditions. Owners report humming or growling that changes with speed, looseness in the front wheel, and in some cases ABS warnings o… Repairs typically run $300-$900. Severity: medium.
What is the 2003-2007 GMC Sierra 1500 Fuel Level Sensor Failure Causing Erratic or Inoperative Gas Gauge?
A very common GMT800 complaint is sulfur contamination and wear of the fuel level sensor contacts inside the tank module, causing the gauge to read empty, full, or fluctuate unpredictably. Owners often see a low-fuel warning with plenty of fuel in the tank or watch the gauge drop… Repairs typically run $450-$1,100. Severity: medium.
What is the 2007-2013 GMC Sierra 1500 Power Door Lock Actuator Failure Causing Intermittent or Inoperative Locking?
GMT900 Sierra trucks are well known for failing door lock actuators, often starting with one door that unlocks weakly or only works intermittently before additional doors fail. Owners report the key fob cycling the locks while one or more doors remain stuck, requiring manual oper… Repairs typically run $180-$500. Severity: medium.
What is the 2003-2007 GMC Sierra 1500 Stepper Motor Instrument Cluster Failure Causing Inaccurate Gauges?
2003-2007 Classic-era Sierra trucks are well known for instrument cluster gauge failures caused by defective stepper motors and, in some cases, backlighting issues. Speedometer, tachometer, oil pressure, fuel, voltage, and coolant gauges can stick, read wildly high or low, or sto… Repairs typically run $250-$700. Severity: medium.
What is the 2007-2019 GMC Sierra 1500 P0128 — Engine Never Reaches Operating Temp from a Stuck-Open Thermostat?
On the Sierra 1500, P0128 means the coolant did not reach the expected regulating temperature within the time/airflow the ECM predicted — almost always a thermostat stuck open (or partly open) so the engine runs too cool. The GM thermostat on the 5.3L/6.2L is integrated into a pl… Repairs typically run $200-$850. Severity: low.
What is the 2007-2018 GMC Sierra 1500 P0442 — Small EVAP Leak from Loose/Cracked Gas Cap or Fractured Filler Vent Hose?
P0442 on the Sierra 1500 is a small EVAP leak detected during the ECM's key-off/idle vacuum test. On these trucks the two most common real-world causes are a loose, worn, or cracked gas cap seal (the cheapest fix and always the first check) and — a documented GM issue (TSB 15-NA-… Repairs typically run $20-$250. Severity: low.
What is the 2007-2023 GMC Sierra 1500 P0455 — Gross EVAP Leak from Failed Vent Solenoid, Missing Gas Cap, or Broken Vent Hose?
P0455 indicates a large (gross) EVAP leak — the ECM cannot pull or hold vacuum in the evaporative system at all. On the Sierra 1500 the classic causes are a completely missing/unsealed gas cap, a stuck-open or failed EVAP vent solenoid (mounted under the truck near the fuel tank/… Repairs typically run $20-$350. Severity: low.
What is the 2007-2013 GMC Sierra 1500 Upper Dash Pad Cracking and Interior Panel Failure in Sun-Exposed GMT800/GMT900 Trucks?
Owners of 2007-2013 Sierra 1500 trucks commonly report the upper dash cracking near the passenger airbag area and around defrost vents, especially in hot climates. While primarily a cosmetic and rattling issue, some owners also complain that broken plastic edges and loose pieces… Repairs typically run $120-$1,200. Severity: low.
