2021 Chevrolet Trailblazer Technical Service Bulletins

753 technical service bulletins (TSBs) are on record for the 2021 Chevrolet Trailblazer. 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.

• 10183782Oct 23, 2020Transmission and drivetrain, Electrical system, Equipment. The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
• 10183126Oct 23, 2020Engine. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
• 10183208Oct 22, 2020Electrical system, Transmission and drivetrain. This technical bulletin provides repair information to correct a customer concern of All-Wheel Drive Off and/or Service All-Wheel Drive System Messages Displayed in the DIC.
• 10182566Oct 22, 2020Electrical system. This Preliminary information communicates to the dealer that if the service AWD (All-Wheel Drive) or AWD (All-Wheel Drive) Off messages are on and there is a history DTC of C15C9 SYM02 set then no repairs are to be made at this time, a software issue was found and Engineering is working on a permanent solution. If the DTC is setting current then published diagnosis needs to be followed.
• 10183779Oct 21, 2020Fuel system. This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
• 10182556Oct 16, 2020Engine cooling. This Preliminary information communicates to the dealer technician a diagnostic tip related to a tapping noise from the engine.
• 10182554Oct 14, 2020Electrical system. This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
• 10183780Oct 9, 2020Equipment. This warranty administration bulletin provides information on Warranty Administration - Customer Concern Not Duplicated (CCND) Labor Operation Numbers.
• 10183221Oct 7, 2020Engine cooling. Emission Recall - General Motors has decided to conduct a voluntary emission recall on certain vehicles with a 1.2L engine (RPO LIH). These vehicles may have received incorrect catalytic converter parts that do not meet all emission system requirements. Dealers are to inspect the catalytic converter and replace if the correct part was not installed.
• 10183791Oct 6, 2020Engine cooling. This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to loss of and/or reduced propulsion and multiple DTCs set.
• 10183219Oct 2, 2020Engine cooling. Emission Recall - General Motors has decided to conduct a voluntary emission recall on certain vehicles with a 1.2L engine (RPO LIH). These vehicles may have received incorrect catalytic converter parts that do not meet all emission system requirements. Dealers are to inspect the catalytic converter.
• 10181724Sep 30, 2020Equipment. This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).
• 10181686Sep 29, 2020Engine cooling. This bulletin is to inform dealers that in extreme cold weather, a grille winter cover needs be added during PDI to avoid the customer returning with concerns related to charge air cooler icing.
• 10181675Sep 29, 2020Equipment, Body and structure. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only).
• 10181174Sep 29, 2020Engine. This Preliminary Information communication advises the technician that the engine exchange program on vehicles equipped with engine Regular Production Option Code LIH has ended. This engine can now be ordered through the regular General Motors Customer Care and Aftersales parts process or Product Quality Center process for required dealers.
• 10181691Sep 23, 2020Body and structure, Electrical system. This technical bulletin provides repair information to correct customer concerns of Power Liftgate and/or Instrument Panel Cluster (IPC) Inoperative, No Audio, AWD/ 2WD Light Toggles Randomly, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0650, P15A1, P159F-00, U0184-00, U0198-00 and/or U1501-00 Set.
• 10181656Sep 21, 2020Electrical system. Service Update - Certain vehicles may have condition that a MIL illuminates on the dash and technicians may find one or more following DTC(s) sets: P2B95, P2B08, P2B09, P2B0A, P2B96, P2B00, P2B01, or P2B02. Dealers are required to reprogram the engine control module.
• 10181153Sep 21, 2020Engine cooling. This Preliminary Information communication advises the technician that the engine exchange program on vehicles equipped with engine Regular Production Option Code L3T has ended. This engine can now be ordered through the regular General Motors Customer Care and Aftersales parts process or Product Quality Center process for required dealers.
• 10181659Sep 18, 2020Engine cooling. Stop Delivery. Incorrect emission parts may have been installed on these vehicles.
• 10181695Sep 17, 2020Equipment, Electrical system. This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.
• 10181712Sep 15, 2020Brakes. This technical bulletin provides repair information to correct a customer concern of an Unwanted Electric Park Brake Setting.
• 10181684Sep 10, 2020Electrical system. This technical bulletin provides a repair procedure to correct a customer concern of start/stop inoperative, MIL illuminated w/DTC P2797.
• 10181697Sep 8, 2020Engine, Body and structure, Electrical system. This technical bulletin provides repair information to correct a customer concern of Flutter or Boom Noise at 1200 RPM- Service Calibration.
• 10181660Sep 2, 2020Transmission and drivetrain. This informational bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
• 10179653Aug 26, 2020Electrical system. This Preliminary information communicates the possibility of the vehicle having dtc P2B95 in history and possibly P2B96 P2B0A, P2B08, or P2B09 due to a software anomally.
• 10213750Aug 19, 2020Engine cooling, Equipment. Service Update Bulletin. Certain vehicles may have a condition where the camshaft actuator oil control valve (OCV) center bolt could stick or bind. If this were to happen, it could cause a MIL light to illuminate on the dash (Service Engine Soon), setting diagnostic trouble codes (DTC?s) P0011 or P0014, the engine could run rough and have reduced power. Dealers will inspect for these DTC?s that could have been set…
• 10180317Aug 14, 2020Tires. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only).
• 10180315Aug 12, 2020Electrical system. This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.
• 10180293Aug 10, 2020Transmission and drivetrain. This informational bulletin explains possible normal condition of a flare from 1st to 2nd, even if the trans had been repaired for the flare and its still noticed.
• 10178983Jul 28, 2020Electrical system. This technical bulletin provides a procedure to correct conditions of Engine Idle Unstable, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0011, P0014, P0016, P0017, P05CC and/or P05CE Set.
• 10207729Jul 24, 2020Engine, Engine cooling. Service Update. Certain vehicles may have a condition where the camshaft actuator oil control valve (OCV) center bolt could stick or bind. If this were to happen, it could cause a MIL light to illuminate on the dash (Service Engine Soon), setting diagnostic trouble codes (DTC?s) P0011 or P0014, the engine could run rough and have reduced power. Dealers will inspect for these DTC?s that could have been set by this…
• 10178966Jul 9, 2020Engine cooling, Equipment. This informational bulletin is to notify dealership personnel as well as providing the customer with the usage instructions from the owner manual, that in extreme cold weather (-18°C or less / 0°F or less), a grille winter cover needs be added during PDI to avoid the customer returning with concerns related to charge air cooler icing.
• 10178974Jul 7, 2020Electrical system. This technical bulletin provides repair information to correct a customer concern of Power Liftgate and/or Instrument Panel Cluster (IPC) Inoperative, No Audio, Malfunction Indicator Lamp (MIL) Illuminated - DTC P159F-00, U0184-00, U0198-00 and/or U1501-00 Set.
• 10178346Jun 25, 2020Electrical system. This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
• 10178338Jun 22, 2020Body and structure. This Preliminary information communicates a work around when only 11 digit PUN (Part Unique Number) is seen on Service Solenoid Body Assembly.
• 10178329Jun 16, 2020Engine cooling. This Preliminary information communicates specific directions for the application of room temperature vulcanizing (RTV) sealant to the engine Lower Crankcase Extension during engine oil pan installation.
• 10178285Jun 16, 2020Electrical system, Equipment. This technical bulletin provides repair information to correct a customer concern of check engine lamp illuminated, DTC P159F 00 set, No Audio.
• 10177362Jun 15, 2020Transmission and drivetrain. Service Update - The gear shift lever may have a detent feel between Park and Reverse caused by the fastening bolt that is not fully seated and contacting the shifter housing. Dealers are to inspect the detent feel of the transmission range selector lever and replace the select cable if necessary.
• 10177361Jun 12, 2020Equipment, Engine. SUB - Certain 2020-2021 Buick Encore GX and 2021 Chevrolet Trailblazer vehicles may have a condition where the camshaft actuator oil control valve (OCV) center bolt could stick or bind. If this were to happen, it could cause a MIL light to illuminate on the dash (Service Engine Soon), setting diagnostic trouble codes (DTC?s) P0011 or P0014, the engine could run rough and have reduced power.
• 10178317Jun 10, 2020Engine cooling, Fuel system, Electrical system. This Preliminary information communicates to the dealer a testing procedure to isolate a potential Engine Oil Pump Switching issue.
• 10177355Jun 4, 2020Engine, Fuel system. Service Update - On certain vehicles, the engine oil pump may be stuck due to foreign material, and diagnostic trouble codes (DTC) P0521, P06DE, P06DD could be set. Dealers are to perform the engine oil pump screening test and if necessary, replace the oil pump.
• 10178276Jun 3, 2020Body and structure. This technical bulletin provides a procedure to locate and fix a possible leak in the roof area due to missing sealant.
• 10178277Jun 2, 2020Body and structure. This informational bulletin provides Information on Proper Liftgate Adjustment.
• 10178275Jun 1, 2020Transmission and drivetrain. This informational bulletin explains how to check if the pulley and/or drive chain has any damage caused by low fluid or a code set that causes the transmission to default maxing out pressure.
• 10176612May 29, 2020Transmission and drivetrain, Equipment. This technical bulletin provides a procedure to replace the transmission auxiliary pump to correct a condition of start/stop inoperative, MIL illuminated w/DTC P2797.
• 10176328May 21, 2020Body and structure. This Preliminary information communicates to the dealer that if the service AWD (All-Wheel Drive) or AWD (All-Wheel Drive) Off messages are on and there is a history DTC of C15C9 SYM02 set then no repairs are to be made at this time, a software issue was found and Engineering is working on a permanent solution. If the DTC is setting current then published diagnosis needs to be followed.
• 10176324May 20, 2020Air bags. This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history. That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.
• 10176817May 19, 2020Transmission and drivetrain, Electrical system, Engine. SUB - Certain 2021 model year Chevrolet Trailblazer, and 2020-2021 model year Buick Encore GX vehicles, equipped with a continuously variable ratio (CVT) transmission, may experience reduced launch performance during a quick exit from a stop/start event. DTC?s P0746 and P0776 may also set illuminating a Check Engine Light. The main pump in the CVT has a priming delay under certain conditions. Dealers will reprogram…
• 10176607May 8, 2020Equipment, Engine, Fuel system. This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
• 10175854Apr 30, 2020Equipment. This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before sold (prepping) to the customer.

← All problems reported for the 2021 Chevrolet Trailblazer