2020 GMC Sierra 2500 Exterior lighting Problems
- Complaints
- 2about this part
- Share
- 3%of 80 total for the year
- Median mileage
- 212miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the exterior lighting of the 2020 GMC Sierra 2500, 3% of the 80 complaints for this model year. Where a mileage was given, the median is 212 miles.
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.
“As I was driving home my check engine light came on and all of my lights went out. I had no tail lights and the radio started saying no signal detected. The dash screen was saying service keyless entry system. And I had no running lights but my headlights. Pretty scary thinking no one could see me as they were driving behind me at a high rate of speed. My truck only has 200 miles on it so this is really scary to be having issues so early in the ownership of this truck. …”
NHTSA complaint #11362480, filed 2020-10, 212 miles“I have taken the vehicle to my local dealership six times. The tailgate started opening and the headlights were blinking on and off. This happened 3 months after I bought it. The dealership told me they changed the tailgate switch and they said there wasn’t anything wrong with my lights. Two weeks after the dealership said they changed the tailgate switch, the tailgate started opening and closing. The lights also stopped working driving down the road at night. This happened 3 different times at night. …”
NHTSA complaint #11691983, filed 2025-10Related 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
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 2 | 7% |
| 2024 | 3 | 3% |
| 2022 | 2 | 4% |
| 2021 | 9 | 17% |
| 2020 | 2 | 3% |
| 2019 | 2 | 6% |
| 2018 | 4 | 11% |
| 2017 | 1 | 3% |
| 2016 | 2 | 3% |
| 2015 | 26 | 29% |
| 2014 | 1 | 3% |
| 2011 | 1 | 2% |
| 2005 | 2 | 2% |
| 2004 | 2 | 1% |
| 2003 | 1 | 1% |
| 2002 | 1 | 1% |
| 2001 | 2 | 1% |
| 1999 | 2 | 6% |
Other parts of the 2020 GMC Sierra 2500
25 complaintsOther or unknown
18 complaintsBrakes
13 complaintsElectrical system
13 complaintsEngine
10 complaintsSteering
6 complaintsBody and structure
6 complaintsForward collision avoidance
5 complaintsVehicle speed control
4 complaintsEngine cooling
2 complaintsFuel system
2 complaintsTires
2 complaints
← All problems reported for the 2020 GMC Sierra 2500
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