Technical Service Bulletin 25-NA-066 — 2025 GMC SIERRA 3500
FUEL/PROPULSION SYSTEM
Bulletin Details
| TSB ID | 25-NA-066 |
| Manufacturer | |
| Vehicle | 2025 GMC SIERRA 3500 |
| Component | FUEL/PROPULSION SYSTEM |
| Communication Date |
Bulletin Summary
This bulletin provides information on checking the inspection/maintenance system status parameters in the ECM and how to have the parameters reset so the system will run and pass.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.