1999-2026 model years · 4,765+ owner reports · Updated September 2026
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According to Au7o's analysis of 4,765+ owner reports, the 1999-2026 GMC Sierra 1500 has 35 documented known issues, with 15 rated critical. The most serious are AFM/DFM Lifter Collapse and Failure ($4,000-$8,000 repair), 8-Speed/10-Speed Transmission Torque Converter Shudder ($150-$4,500 repair), Electronic Brake Control Module Failure ($150-$1,500 repair), Transfer Case Unintended Shift to Neutral ($0-$0 repair), 10L80/10L90 10-Speed Valve Body Failure — Loss of Reverse, Limp Mode, and Year-Long Parts Backorder ($900-$6,500 repair), NHTSA Recall 19V645000: Declining Vacuum Pump Output Reduces Power Brake Assist, Missing Transfer Case Component Can Lock the Front or Rear Wheels Without Warning (Recall 26V289000 — Do Not Drive) ($0-$0 repair), MultiPro Tailgate Drops Open By Itself While Driving — Water Intrusion at the Handle-Cavity Release Switch ($250-$950 repair), Rear-View Camera Unusable at Night — Reverse Lamps Do Not Illuminate the Camera's Field of View ($80-$400 repair), 6.2L L87 V8 Connecting Rod and Crankshaft Failure — Sudden Loss of Propulsion (Recall 25V274000) ($0-$15,000 repair), 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), Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure ($800-$2,500 repair), 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear ($1,800-$3,500 repair) and Fuel Pump Module Failure Causing No-Start or Stalling ($500-$1,200 repair). The most commonly reported issue is AFM/DFM Lifter Collapse and Failure with 1,250 owner reports. Across all issues with published estimates, repair costs range from $20 to $15,000. 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."
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."
ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
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.
EXTERIOR LIGHTING:BRAKE LIGHTS
General Motors (GM) has decided that certain 2022 model year Chevrolet Silverado, and GMC Sierra vehicles equipped with an accessory sport bar. The accessory sport bar contains a high-mounted brake light that may not function. In addition, it may block the vehicle's existing high-mounted brake light. As such, these vehicles may fail to conform to Federal Motor Vehicle Safety Standard (FMVSS) number 108, "lamps, reflective devices, and associated equipment."
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve may fail and cause the rear wheels to lock-up.
+ 5 more recalls. Check all on NHTSA.gov
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According to Au7o's analysis of 4,765+ owner reports, the 1999-2026 GMC Sierra 1500 has 35 documented issues. The most frequently reported are: AFM/DFM Lifter Collapse and Failure, 8-Speed/10-Speed Transmission Torque Converter Shudder, Electronic Brake Control Module Failure. Of these, 15 are rated critical and should be addressed promptly.
The 1999-2026 GMC Sierra 1500 has 35 known issues documented across 4,765+ owner reports. 15 issues are rated critical: AFM/DFM Lifter Collapse and Failure and 8-Speed/10-Speed Transmission Torque Converter Shudder and Electronic Brake Control Module Failure and Transfer Case Unintended Shift to Neutral and 10L80/10L90 10-Speed Valve Body Failure — Loss of Reverse, Limp Mode, and Year-Long Parts Backorder and NHTSA Recall 19V645000: Declining Vacuum Pump Output Reduces Power Brake Assist and Missing Transfer Case Component Can Lock the Front or Rear Wheels Without Warning (Recall 26V289000 — Do Not Drive) and MultiPro Tailgate Drops Open By Itself While Driving — Water Intrusion at the Handle-Cavity Release Switch and Rear-View Camera Unusable at Night — Reverse Lamps Do Not Illuminate the Camera's Field of View and 6.2L L87 V8 Connecting Rod and Crankshaft Failure — Sudden Loss of Propulsion (Recall 25V274000) and 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 Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure 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. 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.
Repair costs for known GMC Sierra 1500 issues range from $0 to $15,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, AFM/DFM Lifter Collapse and Failure, typically costs $4,000-$8,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Reliability varies across model years of the GMC Sierra 1500. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 1999-2026 GMC Sierra 1500 with 35 documented issues documented across 4,765+ owner reports.
The Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems use special hydraulic lifters that collapse to deactivate cylinders for fuel economy. These lifters are prone to premature failure due to poor physical design and inadequate oil flow. Failures can occur as… Repairs typically run $4,000-$8,000. Severity: high.
The 8L90 8-speed and 10L80/10L90 10-speed automatic transmissions experience shuddering during light throttle acceleration, particularly at highway speeds between 35-60 mph. The issue is caused by the torque converter lock-up clutch slipping and chattering. Harsh shifts between g… Repairs typically run $150-$4,500. Severity: high.
The electronic brake control module (EBCM) experiences failures causing ABS, traction control, and stability control systems to malfunction. Issues range from warning lights illuminating to complete system failures. The 2023 models have a specific recall for software that may fai… Repairs typically run $150-$1,500. Severity: high.
An electrical signal short in the transfer case can cause it to shift to neutral without driver input while driving. This results in sudden loss of power to the wheels creating a serious safety hazard, particularly at highway speeds or when towing. Repairs typically run $0-$0. Severity: high.
2024-2025 Sierra 1500 trucks with the 10-speed automatic (5.3L L84, 6.2L L87 and 3.0L Duramax LZ0) are failing at very low mileage with a stuck valve-body solenoid. Symptoms: a 'Service Transmission' or 'Service Transmission — Unable to Shift Soon' message, sudden hard/slamming s… Repairs typically run $900-$6,500. Severity: high.
GM recalled 2014-2018 GMC Sierra trucks under NHTSA campaign 19V645000 because the amount of vacuum created by the vacuum pump may decrease over time. The vacuum pump is what gives the Sierra's brake pedal its power assist, so as the vacuum level drops, brake assist decreases. A… Severity: high.
GM recalled certain 2026 Sierra 1500 trucks built with four-wheel drive or all-wheel drive because a component was omitted from the drivetrain transfer case during assembly. The omission can allow the front and/or rear wheels to lock up suddenly, with no warning to the driver — a… Repairs typically run $0-$0. Severity: high.
2024-2025 Sierra 1500 owners report the power MultiPro tailgate unlatching and falling open on its own, most often while driving, after hitting a bump or rain gutter, or after a car wash. Nobody presses the release; several owners returned to the truck to find the gate resting ag… Repairs typically run $250-$950. Severity: high.
Owners of 2024-2025 Sierra 1500 trucks report the factory rear-view camera image is effectively black in any unlit area. In daylight the picture is sharp; at night the LED reverse lamps are aimed too high and are too dim to light the ground behind the truck, so the camera sensor… Repairs typically run $80-$400. Severity: high.
GM recalled 2021-2024 Sierra 1500 trucks equipped with the 6.2L L87 V8 because manufacturing defects in the connecting rods and/or crankshaft can cause bearing seizure and catastrophic engine failure. Owners in NHTSA reports describe a knocking or grinding noise developing over d… Repairs typically run $0-$15,000. Severity: high.
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.
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.
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.
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.
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.
The upper intermediate steering shaft develops excessive wear causing a pronounced clunking noise when turning the steering wheel or going over bumps. The issue is caused by wear in the shaft's universal joints or the plastic bushing near the firewall. GM has redesigned the part… Repairs typically run $50-$600. Severity: medium.
The A/C compressor is prone to premature failure due to faulty welds, insufficient lubrication, or internal mechanical failure. When the compressor fails catastrophically, metal debris contaminates the entire A/C system requiring replacement of multiple components. The A/C clutch… Repairs typically run $500-$2,500. Severity: medium.
The infotainment system experiences intermittent complete audio loss affecting stereo, turn signals, and safety warning sounds. The audio system may randomly go to maximum volume and cannot be controlled. OTA software updates have caused additional issues including erratic blinke… Repairs typically run $0-$2,500. Severity: medium.
Direct injection engines do not spray fuel over the intake valves like port injection systems, allowing carbon deposits from oil and blow-by gases via the PCV system to accumulate on intake valve backs and ports. Over time, this buildup restricts airflow causing performance and e… Repairs typically run $400-$800. Severity: medium.
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.
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.
