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
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Only bulletins with component: Throttle and cruise control are shown. Show all
| 10-08-110-001L | 2025-02-11. Service bulletin. STRUCTURE:BODY; VEHICLE SPEED CONTROL. This service bulletin provides information on proper use of floor mats. |
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| PIT6196 | 2024-09-04. Service bulletin. UNKNOWN OR OTHER; VEHICLE SPEED CONTROL. This Preliminary information communicates to the tech the diagnostic steps if they encounter at condition where the adaptive cruise, regular cruise control or lane keep assist turns on and off while driving or is inoperative. |
| PIC6446A | 2021-12-13. 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) |
| PIE0619A | 2021-08-09. Service bulletin. LANE DEPARTURE: SENSING SYSTEM: OTHER; VEHICLE SPEED CONTROL:CRUISE CONTROL. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Lane Keep Assist and/or Adaptive Cruise Control being Inoperative. |
| 21NA065 | 2021-05-24. Service bulletin. VEHICLE SPEED CONTROL. This informational bulletin provides information to provide dealership personal the guidelines for determining warranty or non-warranty for side door window glass replacement due to scratches to avoid unnecessary debit. |
| PIE0619 | 2021-05-03. Service bulletin. LANE DEPARTURE: LANE KEEP: STEERING ASSIST; VEHICLE SPEED CONTROL:CRUISE CONTROL. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Lane Keep Assist and/or Adaptive Cruise Control being Inoperative. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.