Service bulletins for the 2021 Chevrolet Traverse
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
666 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| 19NA256 | 2021-07-19. Service bulletin. ENGINE. This service bulletin provides diagnostic aid procedure to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for knocking, rattle, squeak and/or squeal type noises from engine. |
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| 19NA044 | 2021-07-19. Service bulletin. ELECTRICAL SYSTEM; ENGINE. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy. |
| 18NA306 | 2021-07-19. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA). |
| 18NA279 | 2021-07-19. Service bulletin. LATCHES/LOCKS/LINKAGES; ELECTRICAL SYSTEM. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| 21NA124 | 2021-07-06. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set. |
| 21NA108 | 2021-07-06. Service bulletin. UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING. This service bulletin provides diagnostic information for the technician regarding a customer concern of engine overheating, cooling system contaminated with engine oil. |
| 21NA088 | 2021-07-06. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides repair information to correct a customer concern of a Check Engine Light Displayed on Driver Information Center (DIC), Engine Cooling Fan Windmilling, DTC P0494 Set. |
| 21NA040 | 2021-07-06. Service bulletin. SEATS. This technical bulletin provides a procedure to repair a condition of Squeak, Rattle or Creak Noise Originating from Second Row Seat Area by following the procedure outlined within the bulletin. |
| 20NA159 | 2021-07-06. Service bulletin. TIRES. This Warranty Administration bulletin is for information on General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only). |
| 20NA136 | 2021-07-06. Service bulletin. POWER TRAIN. This informational bulletin describes/outlines the process for the 9T65 Automatic Transmission Replacement Pilot Program (U.S. Only). |
| 19NA256 | 2021-07-06. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides diagnostic aid procedure to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for knocking, rattle, squeak and/or squeal type noises from engine. |
| 19NA044 | 2021-07-06. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy. |
| 18NA306 | 2021-07-06. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA). |
| 18NA279 | 2021-07-06. Service bulletin. LATCHES/LOCKS/LINKAGES. This service bulletin provides information for dealers/technicians on the process to disable and enable passive unlocking. |
| N212337230 | 2021-06-14. Service bulletin. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES. Customer Service Program. Certain vehicles were equipped with radios set to ?DEV Mode? at the supplier and shipped to the GM LDT (Lansing Delta Township) vehicle assembly plant. Radios in ?DEV Mode? will be on when the vehicle is ?OFF? and the vehicle battery will experience a drain. Dealers will turn vehicle on and inspect for ?DEV Mode? on the radio display. If ?DEV Mode? appears on the radio display, they will replace the existing radio with a new radio and program the new radio. |
| N212333960 | 2021-06-14. Service bulletin. VISIBILITY; VEHICLE SPEED CONTROL. Customer Satisfaction Program. Certain vehicles were sold and delivered to customers without the originally invoiced accessory inside rearview mirror with garage door opener switches. Customers may either schedule an appointment to have the accessory content installed on their vehicle free of charge, or they will be refunded the amount of the LPO content not installed on their vehicles. |
| PIT5805B | 2021-06-14. Service bulletin. SERVICE BRAKES. This Preliminary information communicates that a dealer may encounter a vehicle that is making a grinding or growling noise on the first few brake applications after the vehicle has been sitting overnight. The dealer is instructed to perform no repairs at this time as engineering is looking into a repair. The dealer is advised that this PI will be converted into a bulletin with repair instruction when updated parts are available. |
| 070089036J | 2021-06-07. Service bulletin. EQUIPMENT. This service bulletin provides information on Enhancing Field Product Reports with Digital Pictures. |
| 050308002I | 2021-06-07. Service bulletin. SUSPENSION. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak. |
| 020089002T | 2021-06-07. Service bulletin. EQUIPMENT. This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only). |
| 000601026N | 2021-06-07. Service bulletin. ENGINE. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage. |
| 21NA103 | 2021-05-24. Service bulletin. EQUIPMENT. This service bulletin provides information regarding Witness Marks from Panel Adjustments Made During Manufacturing and that it is considered a normal condition. |
| 21NA068 | 2021-05-24. Service bulletin. EQUIPMENT:ELECTRICAL. This warranty administration bulletin provides policy information requirements applicable to key fob replacement under the New Vehicle Limited Warranty or under a Replacement Parts Warranty on 2017-2022 and newer model year vehicles with RPO ATH and AVJ (U.S. Only). |
| 21NA063 | 2021-05-24. Service bulletin. BACK OVER PREVENTION. This technical bulletin provides a procedure on a flutter and/or buzz type noise heard from the rear of the vehicle. |
| 20NA215 | 2021-05-24. Service bulletin. POWER TRAIN; STEERING; AIR BAGS. This service bulletin provides a procedure to correct a customer concern of Loss of Power Steering Assist, Service Power Steering and/or Steering Assist is Reduced Drive with Care Message Displayed on Driver Information Center (DIC). |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.