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Service bulletins for the 2021 Chevrolet Trailblazer

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
PIC6446A2021-12-13. Service bulletin. FORWARD COLLISION AVOIDANCE; VEHICLE SPEED CONTROL; TIRES; PARKING BRAKE; LANE DEPARTURE. This Preliminary information communicates to the dealer if the lane keep assist and forward collision alert are inoperative, both indicators may be flashing on and off while driving. When pressing button to turn on the lane keep assist they receive a message stating the system is not available. If the above conditions are met to verify that all of the tires are the correct size as per vehicle build. If an incorrect tire side if found on the vehicle it will cause a wheel speed discrepancy on straight road travel that will disable all driver assistance (Front Camera Module) systems relying on wheel speed sensor data inputs. LKA ? Lane Keep Assist LDW ? Lane Departure Warning FCA ? Forward Collision Alert LSCMB ? Low Speed Collision Mitigation Braking (RPO-UHY)
21NA0162021-05-24. Service bulletin. EXTERIOR LIGHTING; PARKING BRAKE. This service bulletin provides a procedure to locate and repair a possible loose wire crimp in the engine wiring harness to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated.
PIE0605A2021-03-08. Service bulletin. EQUIPMENT; SERVICE BRAKES. This engineering information (EI) Lite is requesting technicians follow the steps in this EI and submit a Field Product Report with the requested information and Submit in regards to a front brake noise Condition.
PIE06052021-03-01. Service bulletin. SERVICE BRAKES. This engineering information (EI) Lite is requesting technicians follow the steps in this EI and submit a Field Product Report with the requested information and Submit in regards to a front brake noise Condition.
19NA2232021-02-22. Service bulletin. SERVICE BRAKES. This service bulletin provides information for dealers/technicians on a normal characteristic of Brake Pedal - Excessive Click Noise with Slight Press of the Brake Pedal.
PIE06052021-02-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; SERVICE BRAKES. This engineering information (EI) Lite is requesting technicians follow the steps in this EI and submit a Field Product Report with the requested information and Submit in regards to a front brake noise Condition.
19NA2232021-02-01. Service bulletin. EQUIPMENT; SERVICE BRAKES. This service bulletin provides information for dealers/technicians on a normal characteristic of Brake Pedal - Excessive Click Noise with Slight Press of the Brake Pedal.
20NA1862020-10-26. Service bulletin. PARKING BRAKE:ELECTRICAL. This technical bulletin provides repair information to correct a customer concern of an Unwanted Electric Park Brake Setting.

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