Technical Service Bulletin 4520 — 2006 GMC ENVOY DENALI
EXTERIOR LIGHTING:HEADLIGHTS
Bulletin Details
| TSB ID | 4520 |
| Manufacturer | |
| Vehicle | 2006 GMC ENVOY DENALI |
| Component | EXTERIOR LIGHTING:HEADLIGHTS |
| Communication Date |
Bulletin Summary
AUTOMATIC HEADLIGHTS INOPERATIVE UNTIL SHIFTER IS PLACED INTO GEAR. *NJ
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.
Other TSBs for the 2006 GMC ENVOY DENALI
PIT3712A
EQUIPMENT:APPLIANCE:AIR CONDITIONER