Onstar telecommunications module failed within 5 months of ownership. GPS and in car navigation goes crazy showing incorrect position which is distracting on the infotainmet screen. Been almost 4 weeks with no estimate of part availability from GM.
2025 GMC Sierra electrical problems
severe 16 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
16
Recalls
0
Avg fix
$850
2crashes
What stands out
Electrical accounts for 19% of all owner complaints filed against this vehicle, across 5 categories tracked.
The failure pattern owners describe
Owners of 2025 GMC Sierra trucks report widespread electrical system failures starting at very low mileage. The most common complaint is complete audio loss affecting the radio, turn-signal chimes, and safety alerts—happening intermittently or dozens of times per ownership, with dealerships unable to identify the cause after multiple visits and GM corporate involvement.
Safety-critical failures include ADAS systems (collision detection, automatic emergency braking, parking sensors) malfunctioning or firing falsely; engine stalls at traffic lights with warning messages; unintended gear shifts from Park to Drive without warning, resulting in at least one crash; and loss of power braking following stall events. One owner reports the vehicle shifted into Drive and accelerated into a garage while parked, with video evidence of flickering headlights.
Secondary electrical issues include radio button failures requiring dangerous steering-wheel interaction while driving; side mirrors failing to return to preset positions; backup camera shutdowns when warm (suspected thermal issue with the Video Processor Module); poor backup camera visibility at night; door latch misalignment; and OnStar/GPS module failure with unavailable replacement parts. Some dealers acknowledge selling vehicles with known issues without disclosure. Dealerships have reset systems without repairing root causes and cannot diagnose the underlying problems despite multiple service attempts and GM corporate consultation.
Same GMC Sierra electrical reports on nearby years: 2022 · 2023 · 2024
Failure modes owners describe
Advanced Driver Assistance Systems (ADAS) malfunction
Collision detection, automatic emergency braking, and advanced cruise control systems fail or engage falsely, triggering phantom braking or disabling without warning.
When: As early as 467 miles; recurring across ownership
Symptoms owners cite: Collision detection fails to function; Automatic emergency braking engages for non-existent objects; Advanced cruise control stops working; Parking sensors malfunction
Repairs/costs cited: Multiple parts replaced at dealership; true cause remains undiagnosed across seven service visits
Recalls/TSBs owners mention: GM corporate contacted; unable to resolve issue; vehicle returned claiming issue resolved, then recurs
Audio system complete loss
Intermittent total loss of audio output affecting radio, turn-signal sounds, and safety alerts including collision warnings and seatbelt reminders.
When: Recurring; approximately every third drive for some owners; at least 20 times over 10 months for another owner
Symptoms owners cite: Radio power button inoperative; No sound from radio, turn signals, or warning alerts; Silence in all interior audio; Audio returns after vehicle sits and cools down
Codes mentioned: PIT 6408
Repairs/costs cited: GMC dealership retained vehicle over one week; unable to identify cause; GM corporate engineers consulted with no resolution after three repair attempts
Recalls/TSBs owners mention: Dealership unable to repair; GM corporate investigating
Radio control buttons and display failure
Radio power button, channel change buttons on steering wheel, volume control, and HOME button become inoperative, forcing drivers to interact with radio display while driving.
When: Ongoing; everyday for some controls, intermittent for others
Symptoms owners cite: Radio power button inoperative; Channel change buttons on steering wheel inoperative; Radio volume stops working; HOME button inoperative
Repairs/costs cited: Certified GM service dept confirmed issues but unable to repair
Engine stall with START ENGINE message
Engine shuts off while vehicle is in gear or at traffic lights; START ENGINE warning appears; restart temporary; occurs unpredictably.
When: At approximately 16,000 miles; also reported at traffic lights and while reversing
Symptoms owners cite: Engine stalls unexpectedly while stopped or reversing; START ENGINE message displayed; Vehicle requires restart; Auto START/STOP feature involved
Repairs/costs cited: Vehicle not serviced for this issue
ESC/TSC system failure with limp mode
Check ESC and Check TSC warnings activate; vehicle enters limp mode; system resets at dealership but recurs; accompanied by exhaust flap valve failure in one case.
When: 02/27/2026; recurred 05/01/2026
Symptoms owners cite: Check ESC warning light; Check TSC warning light; Orange warning lights illuminate; Vehicle enters limp mode; Engine chugging/hesitation; Exhaust flap valve failed with chirping noise
Repairs/costs cited: Dealership reset system but did not repair root cause; muffler replacement performed for exhaust flap valve failure (04/28/2026)
Recalls/TSBs owners mention: OnStar detected critical issue; dealership reset system only
Side mirror preset malfunction
Side mirrors lower automatically when shifting to reverse for ground/parking line visibility, but fail to return to original position approximately 33% of the time; owners must manually reset using preset buttons.
When: Recurring; happens at random intervals
Symptoms owners cite: Mirrors fail to return to preset position after shifting out of reverse; Mirrors lower as designed but do not restore position; Manual reset required
Unintended gear shift and loss of braking control
Vehicle shifts from Park to Drive without driver input; accelerates uphill; no warnings; brakes do not function; headlights flicker irregularly. In separate incident, vehicle stalls at traffic light, then loses power braking after restart.
When: March 2025 (shift incident); traffic light stall followed by brake failure (second occurrence)
Symptoms owners cite: Uncommanded shift from Park to Drive; Acceleration without driver input; No warning before shift; Brakes non-functional; Loss of power braking after restart; Headlights flicker on and off
Repairs/costs cited: Vehicle crashed; ESIS inspection inconclusive
Recalls/TSBs owners mention: ESIS inspection; could not replicate issue
Camera system thermal shutdown
Backup and other vehicle cameras shut down during driving or after vehicle runs for extended period; systems recover after vehicle cools down, suggesting thermal shutoff of Video Processor Module.
When: Recurring; occurs when vehicle is warm/running
Symptoms owners cite: Cameras shut down while driving; Cameras operate normally after cool-down period; Poor night visibility on backup camera
Recalls/TSBs owners mention: GM investigating suspected Video Processor Module thermal issue
OnStar telecommunications module failure
OnStar module failed; GPS and in-car navigation display incorrect vehicle position, causing distraction; part availability unknown and unavailable for extended period.
When: Within 5 months of ownership
Symptoms owners cite: OnStar module inoperative; GPS shows incorrect position; Navigation display distraction
Repairs/costs cited: No estimate of repair availability from GM after nearly 4 weeks
Door locking/unlocking malfunction during stall events
Doors unlock unexpectedly when vehicle stalls at traffic light, then immediately re-lock after restart.
When: Coinciding with stall events
Symptoms owners cite: Doors unlock during engine stall; Doors re-lock after restart
Driver door latch and mirror issues
Driver door hard to close and out of alignment; driver side mirror wobbles at speeds above 50 mph, causing driver distraction.
When: Ongoing
Symptoms owners cite: Driver door difficult to close; Door out of alignment; Driver mirror wobbles above 50 mph; Visual distraction while driving
Synthesized from 16 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
My vehicle is equipped with multiple safety systems offered by general motors. Since purchasing my vehicle new, I have had a persistent and recurring issue related to the vehicle safety system, which is resulted in numerous collision detection and advanced cruise control service is not functioning as designed, creating safety issues for both myself and potentially other motorist on the road.…
The vehicle will loose all interior audio to include stereo, turn signals, and all other audio safety features for several hours at a time. GMC has done three repairs and still no resolution. Lack on audio impacts the safety of the vehicle. Has happened dozens of times and appears to be larger GM issue that is u resolved. Has occurred at least 20 times since I bought the vehicle 10 months ago.
--Radio power button inoperative --Radio channel change buttons, to left of steering wheel inoperative (everyday) --Radio volume inoperative -just stops working (sometimes) --Radio “HOME” button, left of radio power button inoperative --Driver door mirror wobbles when above 50 MPH (very distracting when driving) --Driver door hard to close and out of alignment --Dealership is selling the…
I purchased a 2025 GMC Denali a few months ago. At approximately 7,000 miles, the front brakes failed unexpectedly and were replaced by the dealership. However, by 14,000 miles, I began experiencing brake issues again. Before I could return the vehicle for service, I was driving on the turnpike when the engine suddenly seized without warning. This created an extremely dangerous situation—vehicles…
Had electrical trouble with your 2025 GMC Sierra?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2025 GMC Sierra?
It's a meaningful issue. 16 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Based on the 16 complaints filed, electrical issues most often appear around 16,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2025/GMC/Sierra.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.