The 2023 Blazer sits on GM's C1 platform with three engine choices, but the 2.0L turbo and 9-speed automatic pairing has shown premature wear issues that stand out for such a new model year. Transmission cooling and driveline concerns appear disproportionately early given the vehicle's age.
9-Speed Automatic Transmission Oil Cooler Failure
Common · high severity
Typical onset: 30,000-60,000 mi
Symptoms: Transmission overheating warnings on dash, Harsh shifting or slipping between gears, Metallic smell from transmission fluid breakdown, Reduced power mode activation
Fix: Replace transmission oil cooler and flush contaminated fluid. Requires dropping cooler lines and full transmission service. 3-4 hours labor plus parts. GM issued a recall for some units (NHTSA 23V-372) but coverage is limited by build date.
Estimated cost: $800-1,400
2.0L Turbo Piston Ring Failure and Oil Consumption
Occasional · high severity
Typical onset: 40,000-80,000 mi
Symptoms: Excessive oil consumption (1 quart per 1,000 miles or worse), Blue smoke from exhaust on cold start or acceleration, Misfires and rough idle as carbon builds up, Check engine light with low oil pressure codes
Fix: Requires complete engine teardown: pistons, rings, often cylinder honing or short block replacement if scoring present. 18-24 hours labor. GM's 2.0T LSY engine has known ring sealing issues across multiple platforms. Some get warranty coverage if caught early.
Estimated cost: $6,500-9,500
Driveshaft U-Joint and Center Support Bearing Wear (AWD)
Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Clunking or vibration during acceleration, Rhythmic thumping at highway speeds, Squeaking from underneath vehicle when turning, Vibration that worsens under load
Fix: Replace driveshaft U-joints or entire driveshaft assembly and center bearing. Some techs can rebuild if caught early, but many opt for complete replacement. 2-3 hours labor. Tied to NHTSA recall 23V-634 for some VINs.
Estimated cost: $900-1,600
Transmission Mount Failure
Common · low severity
Typical onset: 35,000-70,000 mi
Symptoms: Excessive engine movement felt during shifts, Clunking when engaging Drive or Reverse, Vibration at idle that intensifies with AC on, Visible tearing or separation of rubber mount
Fix: Replace hydraulic transmission mount. Quick job if you have access—typically 1-1.5 hours. Mount design seems undersized for the turbo torque and 9-speed shift characteristics.
Estimated cost: $350-550
Fuel System Contamination from Filter Degradation
Rare · medium severity
Symptoms: Hard starting or extended cranking, Loss of power and hesitation under load, Fuel pump whining or surging noises, Check engine light with fuel trim or pressure codes
Fix: Internal fuel filter breakdown scatters debris through injectors and pump. Requires fuel pump module replacement, injector cleaning or replacement, and tank drop for full flush. 4-6 hours labor depending on contamination severity.
Estimated cost: $1,200-2,200
Infotainment System Boot Loop and Black Screen
Occasional · low severity
Symptoms: Touchscreen goes black and won't respond, Radio system stuck in reboot cycle showing GM logo repeatedly, Backup camera intermittent or frozen, Loss of Apple CarPlay / Android Auto connectivity
Fix: Software reflash via GM SPS system resolves some cases; others need complete radio module replacement. 1-2 hours for reflash, 2-3 hours for module swap. Multiple TSBs issued but not always covered outside warranty.
Estimated cost: $150-1,800
Owner tips
If buying the 2.0L turbo, verify oil consumption history with records—check oil every 500 miles yourself initially
Service the 9-speed transmission at 40,000 miles regardless of 'lifetime fluid' marketing; use fresh Dexron HP
Inspect transmission mount at every oil change after 30k miles—cheap insurance against bigger driveline wear
AWD models: listen for driveline noises and address immediately before U-joint failure damages output shafts
Hard pass on used 2.0L turbos without documented engine rebuild or warranty; 3.6L V6 is more durable but platform still too new to trust long-term without extended coverage.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: AGM battery required for start-stop system; located under hood
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Every control module on the 2019-2024 Chevrolet Blazer — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
⚠️ Controls automatic headlamps, DRL, high beam assist. Configuration programming recommended but not always required.
Tire Pressure Monitor Control Module (TPMS)relearn only +0.2 hr▸ programming details
📍 integrated in BCM
🔧 TPMS relearn tool or GDS2
⚠️ TPMS receiver integrated in BCM. Sensor IDs must be relearned after tire rotation or sensor replacement. 315 MHz sensors.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
General Motors, LLC (GM) is recalling certain 2023 Cadillac XT6, GMC Acadia, Chevrolet Blazer, Traverse, and 2022-2023 Cadillac XT5 vehicles. The transmission may have been built with an incorrect sun gear, which can result in the driver-side half-shaft disengaging from the transmission.
Consequence: A half-shaft disengaging from the transmission can result in a loss of drive power or vehicle rollaway when the vehicle is placed in park. Either of these scenarios can increase the risk of a crash.
Remedy: Dealers will replace the sun gears, free of charge. Owner notification letters were mailed on July 27, 2023. The remedy is expected to become available August 31, 2023. Owners may contact Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GMC's number for this recall is N222389310.
POWER TRAIN:DRIVELINE:DRIVESHAFT · 23V042000
2023-02-02
General Motors, LLC (GM) is recalling certain 2023 Chevrolet Blazer and Traverse vehicles. The left-side half-shaft assemblies may be missing a retaining ring.
Consequence: A missing retaining ring on the half-shaft can cause half-shaft inner joint separation, resulting in a loss of drive power or vehicle rollaway when the vehicle is placed in park. Either of these scenarios can increase the risk of a crash.
Remedy: Dealers will replace the left-side half-shaft assembly, free of charge. Owner notification letters were mailed February 23, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N222390180.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2023 Chevrolet Blazer 2.5L I4 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.