GMC TSB #SB-10-08-42-001A
2009 GMC Sierra 1500
Affected Component: EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH
- Summary
- BUICK/CADILLAC/CHEVROLET/GMC/PONTIAC/SATURN: LOW BEAM HEADLAMP BULB DIAGNOSIS/REPLACEMENT (INSPECT BULB AND CONNECTOR). DOES NOT APPLY TO VEHICLES EQUIPPED WITH HIGH INTENSITY DISCHARGE (HID) LAMPS. DO NOT REPLACE THE ENTIRE HEADLAMP ASSEMBLY FOR THIS CONDITION. *PE