2021 GMC Sierra 1500 Electrical System Problems
NHTSA component category: ELECTRICAL SYSTEM · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How electrical system ranks on this vehicle
Share of the 515 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 GMC Sierra 1500 overview page.
What owners report
“While driving down the road at random times of the day, random days, random drive periods, random locations, the DIC and touch screen along with…”NHTSA complaint 11575091 — filed 03/02/2024
“It started year and a half ago involving my tailgate. The buttons to operate by upper and lower tailgate failed to operate on the rear…”NHTSA complaint 11575089 — filed 03/02/2024
“Tailgate opens when driving and when parked. I thought something must of hit the button on the dash the first time it happened but now…”NHTSA complaint 11545110 — filed 09/18/2023
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Electrical System complaints by year filed
Frequently asked questions
Does the 2021 GMC Sierra 1500 have electrical system problems?
Electrical System is the #3 most-reported problem area on the 2021 GMC Sierra 1500: 67 of 515 complaints on file (13%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2021 GMC Sierra 1500 have in total?
515 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 5 involved a crash, 6 involved a fire, 2 reported injuries, and none reported deaths.
What does NHTSA's electrical system category include?
NHTSA assigns each complaint to standard component categories; this page reports the ELECTRICAL SYSTEM category exactly as NHTSA defines and records it.
