Technical Service Bulletin N212342980 — 2020 GMC SIERRA 3500
ELECTRICAL SYSTEM
Bulletin Details
| TSB ID | N212342980 |
| Manufacturer | |
| Vehicle | 2020 GMC SIERRA 3500 |
| Component | ELECTRICAL SYSTEM |
| Communication Date |
Bulletin Summary
On certain vehicles equipped with a 6.6L diesel engine (RPO L5P), the DEF tank connector may overheat and set the following diagnostic codes (P10D9, P143C and P10F3), which will result in reduced engine speed. Dealers are to reprogram the reductant control module.
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.