2020 GMC Sierra 3500 Exterior lighting Problems
- Complaints
- 1about this part
- Share
- 2%of 51 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the exterior lighting of the 2020 GMC Sierra 3500, 2% of the 51 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“My IntelliBeam function stops working sometimes, I can still use the lights as normal but the IntelliBeam function stops every so often and starts working after about 2 to 10 mins. Lane departure warning stops every so often and will start working after 1 to 10 mins, I have noticed that when it stops working at night time then the IntelliBeam function stops working also. When I press the on/off button for lane departure then it will say that lane departure is unavailable right now. I have been getting a p20ee code showing something is wrong with SCR nox sensor 2. …”
NHTSA complaint #11661486, filed 2025-05Related service bulletins
- 11026022Jun 2, 2025This service bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer…
- 11019325Apr 15, 2025This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling.
- 11017243Mar 25, 2025This service bulletin provides technicians with information on available BCM calibrations to restore bulb outage detection on vehicles produced by a second stage manufacturer…
- 11014170Jan 27, 2025This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines.
Exterior lighting: other model years
Other parts of the 2020 GMC Sierra 3500
19 complaintsElectrical system
9 complaintsBrakes
7 complaintsEngine
6 complaintsFuel system
6 complaintsOther or unknown
6 complaintsBody and structure
5 complaintsTires
4 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsAir bags
1 complaintsEngine cooling
1 complaintsForward collision avoidance
1 complaints
← All problems reported for the 2020 GMC Sierra 3500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology