2023 Chevrolet Blazer Problems: 4 Issues Every Owner Should Know
2023 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2023 Chevrolet Blazer has 4 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $0 to $4,000. DIY maintenance guides at au7o.io.
All 4 Known Issues
On the 2019-2024 Chevrolet Blazer, the 2019+ Blazer with the 9-speed automatic transmission (9T50/9T65) develops a shudder during acceleration from a stop, particularly between 1st and 2nd gear. GM bulletin PIP5608J addresses TCC shudder/surge issues. The root cause involves excess lubrication on internal parts contaminating the transmission fluid. Some owners require torque converter or full transmission replacement.
Common Symptoms
- Shuddering during acceleration from stop
- Hesitation or jerking between 1st and 2nd gear
- Vibration at low speeds (20-40 MPH)
- Rough or delayed shifting
- Bucking sensation during light acceleration
How to Fix
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeTransmission flush kit for complete fluid exchange to address shudder (Liqui Moly Transmission Flush Kit)
- UpgradeFull synthetic ATF designed to reduce shudder in automatic transmissions (Valvoline MaxLife ATF Full Synthetic)
On the 2019-2025 Chevrolet Blazer, the Blazer uses the GM 9T50 (2.0T/2.5L FWD) or 9T65 (3.6L AWD) 9-speed automatic with similar shift quality concerns as other GM 9-speed applications. Harsh shifts, delayed engagement, and shudder at light throttle are reported. GM has released multiple TCM calibration updates.
Common Symptoms
- Harsh or clunky shifts
- Shudder at light throttle
- Delayed shift from Park
- Gear hunting on hills
How to Fix
TCM recalibration with latest software. Fluid exchange with Mobil 1 LV ATF HP. Most issues resolve with software updates.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- TipTSB 20-NA-136 specifically lists 2019 Blazer with 9T65 (RPO M3V) for 1-2 upshift slip/flare and hesitation 5-15 mph. First authorized step is TCM calibration update. If dealer says 'no calibration available', request second opinion - GM has released multiple 9T65 updates since 2019. Print TSB from NHTSA.gov and bring to appointment
- TipIf TCM reprogramming doesn't resolve harsh shifts, next step per TSB 20-NA-136 is valve body and solenoid pack inspection. P0756 (Shift Solenoid B Performance/Stuck Off) is a known 9T65 failure mode not resolvable by software. Solenoid pack is integral to valve body - both replaced together
- NoteIf Blazer experiences complete loss of drive, sudden neutral at highway speed, or recurring hard shifts after TCM updates, escalate to GM Customer Care (1-800-222-1020) and request field engineer review. Extended warranty or goodwill repair granted in documented repeat-failure cases on 9T65. Same transmission as Traverse, Equinox, GMC Terrain
- UpgradeTransmission flush kit for complete fluid exchange to address shudder (Liqui Moly Transmission Flush Kit)
- UpgradeFull synthetic ATF designed to reduce shudder in automatic transmissions (Valvoline MaxLife ATF Full Synthetic)
On the 2019-2025 Chevrolet Blazer, the 9-speed automatic transmission (9T50/9T65) produces a noticeable shudder during light acceleration and torque converter lockup, typically between 30-50 mph. Harsh or delayed shifts, especially 1-2 and 2-3, are also common complaints. GM has issued multiple TSBs addressing transmission calibration.
Common Symptoms
- Shudder during light acceleration at 30-50 mph
- Harsh 1-2 shift
- Delayed downshift
- Transmission hesitation from stop
How to Fix
Start with a transmission fluid flush using the updated Mobil 1 Synthetic LV ATF HP fluid and a TCM reprogramming to the latest calibration. If shudder persists, the torque converter may need replacement. GM has a customer satisfaction program for some VINs — check with your dealer for eligibility.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeTransmission flush kit for complete fluid exchange to address shudder (Liqui Moly Transmission Flush Kit)
- UpgradeFull synthetic ATF designed to reduce shudder in automatic transmissions (Valvoline MaxLife ATF Full Synthetic)
On the 2019-2025 Chevrolet Blazer, the AGM battery required for the auto start-stop system degrades prematurely, often failing within 2-3 years. When the battery weakens, the start-stop system disables itself and various electrical warnings appear. The auxiliary battery (on equipped models) can also fail, compounding the issues.
Common Symptoms
- Start-stop system not functioning
- Battery warning messages
- Multiple warning lights on startup
- Slow cranking
- Electrical accessories resetting
How to Fix
Replace the AGM battery with a genuine ACDelco AGM battery — standard flooded batteries are not compatible with the start-stop system. After replacement, a battery sensor reset via a scan tool is required. Some owners permanently disable start-stop with aftermarket modules if they find the feature annoying.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeHigh-performance AGM battery with excellent cold cranking amps and deep cycle capability (Optima RedTop AGM Battery)
- UpgradeOEM-quality replacement battery with reliable performance (ACDelco Professional AGM Battery)
- UpgradeAutomatic battery maintainer to prevent parasitic drain issues during storage (Battery Tender Junior 12V Battery Charger Maintainer)
- UpgradeOEM-quality replacement sensor for accurate readings and proper system function (Bosch Replacement Sensor)