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Service bulletins for the 2023 Chevrolet Blazer

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.

574 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
21-NA-2792023-10-14. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides a procedure to replace the starter if found the cause of the rattle noise.
23-NA-1542023-10-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin provides information on Warranty Administration – Required Operating Procedures - 8 Points (U.S. Only).
23-NA-0292023-09-30. Service bulletin. POWER TRAIN. This service bulletin provides a procedure to locate a possible shaft not inserted into the differential carrier that may have popped out to correct customer concerns of Transmission Grinds When Put Into Gear, Slipping, No Movement When Shifted Into Drive or Reverse.
17-NA-1572023-09-26. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin explains the difference in oil filters for gas engines with new oil pump control systems and the possibilities of what may happen using the incorrect filter.
23-NA-1532023-09-26. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
18-NA-3062023-09-26. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
PIT5551L2023-09-18. Service bulletin. FORWARD COLLISION AVOIDANCE. This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting. This is normal when the FAB has been set to "Alert".
PIT60502023-09-18. Service bulletin. ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC). This Preliminary information communicates to dealership technicians that if they receive a radio with the 2 stickers as noted above, the radio was remanufactured with missing components and will need to order another radio unit from the ESC to properly repair the vehicle at this time.
PIT60442023-09-18. Service bulletin. BACK OVER PREVENTION:SOFTWARE. This Preliminary information communicates that a Software update is in the works and to disconnect the 12 volt battery to clear the codes.
18-NA-0732023-09-15. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
PIE0749A2023-09-15. Service bulletin. SEATS. This engineering information (EI) closure ends the need for gathering further information from technicians in regard to having a squeak, rattle and/or creak type noise heard from the second row-seat area.
PIE0742A2023-09-15. Service bulletin. ENGINE AND ENGINE COOLING. This engineering information (EI) closure ends the need for gathering further information in regard to the Check Engine Lamp illuminated on the Driver Information Center (DIC).
PIE0733A2023-09-15. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the A/C being inoperable.
23-NA-1352023-09-15. Service bulletin. POWER TRAIN. This informational bulletin advises the changes to some of the 9-speed automatic transmission oil control changes from previous years.
23-NA-0822023-09-14. Service bulletin. LANE DEPARTURE; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. This service bulletin provides a procedure for rear park assist button replacement due to some vehicles that were built with a ride control switch that still contains the rear park assist button on it.
19-NA-1672023-09-13. Service bulletin. STRUCTURE; ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of a water leak into interior, and/or various electrical concerns, liftgate actuator noisy or inoperative.
18-NA-3062023-09-13. Service bulletin. EQUIPMENT. This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).
09-00-89-016H2023-09-13. Service bulletin. EQUIPMENT. This Warranty Administration bulletin provides information on the proper use of the labor operation 0600014.
23-NA-1412023-09-13. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin advised the technician that the engine and related parts will be debited if found that the tech didn't properly prepare the engine block from dirt and debris in bolt holes or if found that the block was damaged by the tech.
21-NA-1812023-09-09. Service bulletin. POWER TRAIN. This service bulletin provides 9th gear operation information to respond to customers that may comment on transmission shift operation.
16-NA-2222023-09-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
15-00-89-004F2023-09-08. Service bulletin. STEERING; SUSPENSION; ENGINE AND ENGINE COOLING; POWER TRAIN. 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.
21-NA-1692023-09-06. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. 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.
20-NA-1362023-09-06. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. This informational bulletin describes/outlines the process for the 9T65 Automatic Transmission Replacement Pilot Program (U.S. Only).
04-06-04-051H2023-08-28. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.