There are 1 stored owner reports matching the lighting leading-label group for the 2011 GMC Sierra in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)THE HEADLIGHTS DIM THEN RETURN TO NORMAL EVERY TIME THE BREAK IS APPLIED. INTERIOR LIGHTS DIM AND RETURN TO NORMAL WHEN HAZARD LIGHTS ARE ACTIVATED. DEALER FOUND THE COMPLAINT TO BE VALID. BATTERY TESTED AND FOUND TO BE GOOD. VOLTAGE TEST OF ALTERNATOR CHECKED OUT NORMAL. ENGINE AND BODY GROUNDS CHECKED OUT NORMAL. DEALER REPLACED BRAKE SWITCH WITH NEW PART WITH NO CHANGE. GENERAL MOTORS REFERENCED SERVICE BULLETIN #02-06-03-008D AND CLAIM THE TRUCK IS OPERATING AS DESIGNED. AFTER SEVERAL CONVERSATIONS WITH GM CUSTOMER SERVICE THEY TOLD ME THERE WAS NOTHING THEY WOULD DO ABOUT THE DESIGN OF THE SYSTEM AND I AM STUCK WITH THE TRUCK AS IS. THE GM SERVICE REPRESENTATIVE ALSO REFUSED TO SEND ME ANY DOCUMENTATION REGARDING MY CUSTOMER CLAIM AND DIRECTED ME BACK TO THE SERVICE BULLETIN AND THE DEALER. I HAVE INVESTED A LOT OF MONEY INTO THIS VEHICLE AND HAVE NO CONFIDENCE IN ITS SAFETY AT NIGHT. MY GM CUSTOMER CLAIM #[XXX]. THIS TRUCK WAS PURCHASED NEW AND I WOULD NOT ALLOW MY FAMILY TO OPERATE IT AT NIGHT AND I AM VERY CONCERNED ABOUT THE LIGHT SYSTEM FAILING OR SHORTING OUT AS THE VEHICLE GETS OLDER. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.