Service bulletins for the 2025 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.
432 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
By topic
| 21-NA-181 | 2024-12-18. Service bulletin. POWER TRAIN. This service bulletin provides 9th gear operation information to respond to customers that may comment on transmission shift operation. |
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| 19-NA-219 | 2024-12-17. Service bulletin. ENGINE. This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue. |
| 18-NA-180 | 2024-12-17. Service bulletin. FUEL/PROPULSION SYSTEM; ELECTRICAL SYSTEM. This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| PIT5985G | 2024-12-17. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER; FUEL/PROPULSION SYSTEM. This Preliminary information communicates diagnostic tips on how to resolve a issues with vehicles that will not power up after a can bus 2 issue, lightning strike, or a failed over the air update. |
| PIT5832S | 2024-12-16. Service bulletin. ENGINE; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly. |
| PIT5962B | 2024-12-12. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This Preliminary information communicates a GM part number for reflective high temperature heat or insulating tape when repairing wiring harnesses. |
| PIT6274A | 2024-12-11. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealership technicians that if they have a customer with this issue, do not replace any parts until the repair is available. |
| 21-NA-043 | 2024-12-10. Service bulletin. STRUCTURE:BODY; WHEELS; ENGINE; SERVICE BRAKES; UNKNOWN OR OTHER. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer. |
| PIC6587 | 2024-12-09. Service bulletin. UNKNOWN OR OTHER; LANE DEPARTURE: ASSIST; LANE DEPARTURE: WARNING. This Preliminary information communicates Thus the active safety systems maybe inoperable and to perform a module reset to correct. |
| PIC6552D | 2024-12-09. Service bulletin. LANE DEPARTURE: ASSIST; UNKNOWN OR OTHER; LANE DEPARTURE: WARNING. This Preliminary information communicates how to recover the Image Processing Module. |
| PIT6235A | 2024-12-09. Service bulletin. UNKNOWN OR OTHER; POWER TRAIN; ELECTRICAL SYSTEM. This Preliminary information communicates that a vehicle may have various warning lights on or various symptoms. The technician will find various codes set. The tech is directed to inspect a wiring harness under the cowl for chafing and damage. If damage is found it should be repaired. |
| PIT6231A | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates that poor phone call sound may be due to microphone being installed upside down. Technician is to reinstall the microphone to ensure it is installed correctly. |
| PIT5985F | 2024-12-05. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates diagnostic tips on how to resolve a issues with vehicles that will not power up after a can bus 2 issue, lightning strike, or a failed over the air update. |
| PIT5832R | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly. |
| PIT6068C | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates a vehicle may exhibit a service driver assist message. On inspection the tech will find B1A05 set in the Front View Camera Module (FVCM). The tech is directed to perform programming and learn on the FVCM. |
| PIT6265 | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealership technicians that if they encounter a vehicle with this issue, they can contact TCSC to have the software for the MDI backdated to communicate properly. |
| PIP6009A | 2024-12-05. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates the request that engineering it looking to get data from these vehicles before any work is being performed. |
| PIT6068B | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates a vehicle may exhibit a service driver assist message. On inspection the tech will find B1A05 set in the Front View Camera Module (FVCM). The tech is directed to perform programming on the FVCM. |
| PIT6257 | 2024-12-05. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates that a vehicle may have P0534 set. There is a possibility that the circuits may have been swapped for temperature sensors 5 and 6. The technician is instructed to inspect the circuits at sensors 5 and 6 and if they are incorrect to move them to the correct terminals at the Battery Energy Control Module and to label the circuits. |
| PIT6239A | 2024-12-05. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates that a vehicle may be encountered that is equipped with heated seats but there will be no buttons on the display to control them. The technician is advised to update the BCM with the latest calibrations. |
| PIT6247 | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates direction to find information at www.gmupfitter.com for Police and Special Service Vehicles. |
| PIT5551P | 2024-12-05. Service bulletin. FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING. 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". |
| 24-NA-239 | 2024-12-05. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope. |
| PIP5981B | 2024-12-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates ordering process for the front and rear drive units are on restriction for all listed EV vehicles for engineering review. |
| PIT6290 | 2024-12-04. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This Preliminary information communicates a vehicle may be encountered with a concern of heat blowing cold at times, a whistling noise and P0534. Any or all of these conditions may be noted by a technician or customer. The dealer technician is directed to test the temperature at the condenser check valve, inspect the valve and inspect the line for a possible issue with the opening in the line. A procedure is given to modify the line if needed. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.