2021 Chevrolet Blazer Technical Service Bulletins

814 technical service bulletins (TSBs) are on record for the 2021 Chevrolet Blazer. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10212922May 11, 2022Body and structure. This technical bulletin provides a procedure replace the tappet that is located on the fuel door.
• 10212910May 11, 2022Wheels. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10213791May 9, 2022Electrical system. This Preliminary information communicates and issue with the memory seat module waking up the low speed GM lan bus and causing a battery draw.
• 10213788May 6, 2022Equipment. This Preliminary information communicates a condtion where SD card removed is being displayed on the radio display intermittently. ThisPI advises that engineering is working on a fix for this issue
• 10211692May 2, 2022Engine cooling. This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
• 10211658May 2, 2022Engine, Equipment. This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
• 10210840Apr 21, 2022Body and structure. This technical bulletin provides a procedure replace the tappet that is located on the fuel door.
• 10210841Apr 20, 2022Equipment. This service bulletin provides information for replacement parts traceability (RPT) process to aid in tracking part replacements.
• 10211770Apr 19, 2022Visibility (wipers, defrost, mirrors). This Preliminary Information communication advises the technician the steps on diagnosing the concern. Customer's sunroof operation intermittent, bind, noise, auto-reverse, and/or water leaks.
• 10210544Apr 14, 2022Brakes. This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.
• 10210543Apr 13, 2022Equipment. This informational bulletin provides information on a guide to help reduce repeat visits for the same customer concern.
• 10210404Apr 8, 2022Transmission and drivetrain, Equipment. This service bulletin provides 9th gear operation information to respond to customers that may comment on transmission shift operation.
• 10210442Apr 7, 2022Other or unknown. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to air conditioning repairs, or other repairs the require the evacuation of the a/c refrigerant.
• 10210441Apr 7, 2022Body and structure. This preliminary informational (PI) bulletin provides information to dealership personnel which may be helpful when addressing underbody component corrosion with customers.
• 10210286Apr 7, 2022Transmission and drivetrain. This service bulletin provides diagnostic information/procedures to aid the service technician in diagnosing 9T45/50/60 automatic transmissions with low mileage and DTCs current or history related to the control solenoids and valves.
• 10210194Apr 5, 2022Other or unknown. This informational bulletin provides information on a guide to help reduce repeat visits for the same customer concern.
• 10210284Apr 4, 2022Engine cooling. This technical bulletin provides repair information to correct a customer concern of DTC P261F – Coolant Pump A Stuck On Setting Check Engine Lamp to Illuminate After Two Faults.
• 10209980Mar 31, 2022Engine cooling. This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.
• 10209977Mar 30, 2022Equipment. This service bulletin provides information for replacement parts traceability (RPT) process to aid in tracking part replacements.
• 10210349Mar 29, 2022Engine, Electrical system, Engine cooling. This Preliminary information communicates that a vehicle may come into the dealer with various concerns which may include a service engine light or various warning messages on the DIC. The technician is instructed to inspect a wiring harness for chaffing on a bracket which is located beneath the battery tray.
• 10209960Mar 29, 2022Body and structure. This technical bulletin provides repair information to correct a customer concern of a humming noise heard coming from front end of vehicle when driving at highway speeds.
• 10210348Mar 28, 2022Electrical system. This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated with these vehicles does not allow controller swaps between vehicles.
• 10210347Mar 28, 2022Engine cooling. This Preliminary information communicates the possibility of the engine running hot or overheating with no DTC's due to inaccurate coolant temperature sensor located on the coolant pump outlet pipe.
• 10210345Mar 25, 2022Brakes. This Preliminary information communicates information to diagnose DTC C056D or C056E.
• 10209756Mar 25, 2022Electrical system. This service bulletin provides repair information to correct a customer concern of Blue or Black Screen and Service Rear Vision System Message on Radio Display Shifting into Reverse.
• 10209743Mar 25, 2022Wheels, Equipment. This bulletin updates the position of General Motors on refinishing fully color painted aluminum wheels with base paint. GM has established a new process for the way that refinishing under GM Warranty will be handled (U.S. ONLY).
• 10209921Mar 22, 2022Engine cooling. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
• 10209747Mar 22, 2022Equipment. This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
• 10209512Mar 16, 2022Wheels. This engineering information (EI) closure ends the need for further information from the field in regards to the rotational metallic grinding/rubbing noise from one or both front wheels.
• 10209508Mar 14, 2022Engine cooling. This technical bulletin provides repair information to correct a customer concern of a Check Engine Lamp Illuminated in the DIC (Driver Information Center), Temperature Gauge Inaccurate, and/or Cooling Fans Continue Running after Vehicle is Turned Off, with DTC P0128 Set.
• 10209400Mar 11, 2022Equipment, Electrical system, Engine cooling. This service bulletin advises the technician of a diagnostic test for a possible issue with a damaged OCV solenoid that may cause an oil leak and misfire, illuminating the MIL and setting DTCs P0300, P0302 and/or P0305.
• 10209401Mar 9, 2022Brakes. This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.
• 10210321Mar 7, 2022Wheels, Tires. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
• 10208994Feb 25, 2022Engine. This Preliminary information communicates a possible issue with the active fuel management rockers causing a misfire and the correction for this concern.
• 10214240Feb 24, 2022Electrical system. This service bulletin provides repair information to correct a customer concern of Instrument Cluster DIC Displays Programming in Progress Message and Progress Bar.
• 10208991Feb 24, 2022Electrical system. This Preliminary information communicates a process to correct the concern of Unable to contact OnStar after the 3G EOL on 2015-2022 model year vehicles in the United States.
• 10208983Feb 14, 2022Electrical system. This Preliminary information communicates and issue with the memory seat module waking up the low speed GM lan bus and causing a battery draw.
• 10214223Feb 4, 2022Equipment. This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
• 10208971Feb 3, 2022Wheels, Tires. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
• 10214224Feb 2, 2022Equipment. This technical bulletin provides repair information to correct a customer concern of hearing front brake grind/groan noise after sitting overnight.
• 10208968Feb 2, 2022Other or unknown. This Preliminary information communicates a possible issue with the active fuel management rockers causing a misfire and the correction for this concern.
• 10215771Feb 1, 2022Other or unknown, Engine cooling. Engineering Information.
• 10213766Jan 28, 2022Equipment. This Warranty Administration bulletin provides information on Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information.
• 10213762Jan 28, 2022Equipment. This service bulletin provides information for dealers/technicians on Use of Dealer Case Management (DCM) and Being Prepared for Contacting U.S. Technical Assistance (TAC).
• 10212633Jan 28, 2022Equipment. This service bulletin provides information for the Global Warranty Management (GWM) Warranty Parts Center (WPC) Part Photo Return Process (U.S. Dealers Only).
• 10213768Jan 27, 2022Equipment, Body and structure. This preliminary informational bulletin provides information on Damaged, Disassembled or Improperly Packaged Turbochargers Returned to Warranty Part Center.
• 10213765Jan 27, 2022Fuel system, Other or unknown. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
• 10213761Jan 27, 2022Back-over prevention (rear camera). This informational bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
• 10212603Jan 27, 2022Brakes. This service bulletin provides information for cleaning brake dust off of aluminum or chrome wheels.
• 10208066Jan 27, 2022Back-over prevention (rear camera). This Preliminary information communicates to the dealers information related to a hot idle tick noise from the engine. Testing to isolate the noise to the upper engine / valve train and repair recommendations related to valve train components.

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