The vehicle caught on fire in our garage The Vehicle had been parked outside than moved into the garage nothing smelled like smoke after it was parked other than the exhaust after I got out of my suburban I have a good idea what caused this but until its done being ispected I happened to look back and saw a flame in the Suburban coming from the center area of the dash on the right hand side of…
2021 Chevrolet Suburban electrical problems
severe 12 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
12
Recalls
0
Avg fix
$850
1fire
4injuries
The failure pattern owners describe
Buyer takeaway: A 2021 Suburban buyer should know that owners report severe engine failures (valve lifters, bearing failures) resulting in complete shutdown and $14,000+ replacement costs, plus widespread electrical gremlins—fires, failed seat memory, inoperative infotainment, safety restraint warnings—that dealerships repeatedly fail to diagnose or fix. No recalls have been issued despite these complaints appearing frequent in forums and Facebook groups.
Owners report a range of serious electrical and powertrain failures in the 2021 Suburban. Engine-related failures dominate the complaints: valve lifter malfunctions with metal shavings in the oil system (some occurring a second time after warranty repairs), catastrophic bearing failures causing complete engine shutdown at highway speeds, and rough running with multiple system faults. Several owners report complete engine shutdown with loss of all electronics—one at 75 mph near the California/Nevada border. A vehicle caught fire in a garage, with flames originating from the center dash area on the right side of the driver's seat; the owner suspects fluid contamination in the wiring after prior service work.
Beyond the engine, owners describe electrical system glitches: infotainment screens going black with inoperative backup cameras, driver-seat adjustments (seat memory, mirror position) failing to set correctly and creating unsafe driving conditions, windshield wipers activating on their own and operating at wrong speeds, doors locking with keys inside while the engine is off, and key fob showing "sleep mode" despite keys being present. The safety restraint system fault light recurs persistently even after multiple dealer visits. One vehicle went dead three times after an HVAC repair involving the evaporator core. Owners cite lack of recalls, warranty denials, long parts backlogs, and dealerships unable or unwilling to diagnose root causes.
Same Chevrolet Suburban electrical reports on nearby years: 2022 · 2023
Failure modes owners describe
Valve Lifter Malfunction / Engine Failure
Valve lifters fail, causing metal shavings throughout the oil system, rough running, and catastrophic engine damage including camshaft failure. Some owners experience lifter failure a second time after previous warranty repair.
When: One incident at 107,000 miles; another at approximately 3-4 years of ownership; one repeat failure after previous 2022 warranty repair
Symptoms owners cite: Rough shaking and ticking noises; Check engine light and service codes (Service ESC, Service Traction Control); Metal shavings in oil system; Complete engine seizure and shutdown at highway speed (75 mph); Multiple cylinders misfiring; Engine unable to restart
Codes mentioned: Service ESC, Service Traction Control
Repairs/costs cited: Full engine replacement quoted at approximately $14,000; several owners report engines on backorder with GM; one owner paid out-of-warranty for replacement engine that failed again 3 months later with metal shavings
Recalls/TSBs owners mention: Valve lifters on left side replaced under warranty in 2022 for one owner; GM denied extended coverage or service programs; no recall issued despite reported frequency
Electrical Fire in Dashboard
Vehicle caught fire in garage, with flames originating from the center dash area on the right side of the driver's seat. Owner reports fluid pushed up into wiring after prior service and splatter inside dash after steering wheel installation.
When: Not specified; vehicle had history of multiple mechanical issues including engine replacement
Symptoms owners cite: Visible flame in dashboard center area; Fire started after moving vehicle into garage
Repairs/costs cited: Vehicle fire department response; home owner's insurance adjuster involved; interior dash torn out during inspection
Driver Seat Memory and Mirror Preset Failure
Seat, mirror, and steering column pre-set driver adjustments fail to configure properly on a regular basis, creating unsafe driving conditions. Seat squeezes driver torso into steering column; mirror inadvertently tilts downward, obscuring rear traffic visibility when pulling from a stop.
When: Ongoing since June 2023; one year or more while under factory warranty
Symptoms owners cite: Seat does not position correctly, squeezing driver into steering wheel and knees into dash; Left mirror tilts downward unexpectedly; Mirror tilt often unnoticed, creating dangerous blind spot conditions
Repairs/costs cited: Multiple trips to dealership service department yielded no remedy; dealership stated nothing more could be done
Recalls/TSBs owners mention: Dealership (Bonner Chevrolet, Kingston) unable or unwilling to repair; Chevrolet chat support recommended other dealers, none willing to address issue
Infotainment System Malfunction
Infotainment center display goes black and becomes inoperable; backup camera fails; vehicle cannot receive over-the-air safety updates from manufacturer.
When: At 88,000 miles
Symptoms owners cite: Black screen on infotainment display; Backup camera inoperative; Unable to receive over-the-air safety updates
Recalls/TSBs owners mention: Local dealer and manufacturer notified but no assistance provided; cause not determined
Service Safety Restraint System Warning
Warning message 'Service Safety Restraint System' appears on dashboard, affecting the airbag control module under the driver seat. Referenced as TSB PIT5759 but not covered under recall.
When: Recurring; at least one instance of multiple dealer visits over time
Symptoms owners cite: Dashboard warning message for safety restraint system; Airbag control module implicated
Codes mentioned: TSB PIT5759 (per owner)
Repairs/costs cited: Dealership stated not a recall or warranty part; repair cost responsibility unclear
Recalls/TSBs owners mention: TSB PIT5759 exists but no recall; warranty does not cover; dealership unable or unwilling to repair despite safety implications
Electrical System Faults and Key Fob Dysfunction
Multiple electrical system failures including engine shutdown with no check engine light, automatic locking of doors with keys inside while engine is off, and key fob showing sleep mode or 'not present' when keys are actually present.
When: One engine failure on May 6, 2021 (early ownership); issues ongoing
Symptoms owners cite: Engine failed with no check engine light warning; Engine sluggish and hesitant; Headlights do not activate in auto mode when dark; Doors lock with keys inside, engine off; Key fob shows sleep mode or not present despite keys being present; Inability to accelerate on highway
Repairs/costs cited: Dealership inspection and repair attempted; no diagnosis documented
Windshield Wiper and Light Malfunction
Windshield wipers activate unexpectedly while in the off position; wiper speed triples when turn signal is used. Rear hatch open warning and cargo light illuminate despite hatch being closed.
When: Not specified
Symptoms owners cite: Wipers start automatically while in off position; Wiper speed increases to 3x normal speed when turn signal is engaged; Display shows rear hatch open when it is closed; Cargo light remains on despite hatch closure; Conditions persist after multiple vehicle restarts
Electrical System Failure After HVAC Service
Following dealership HVAC repair involving evaporator core replacement, vehicle experiences multiple electrical failures including loss of 12V outlet function and complete electrical system shutdowns.
When: After major HVAC repair; three separate shutdown incidents occurred
Symptoms owners cite: Second-row 12V outlet non-functional; Vehicle goes completely dead while engine off (auto stop/start system); Engine fails to restart automatically; Entire electrical system becomes unresponsive; One incident occurred while stationary on major highway, creating dangerous situation
Synthesized from 12 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Car suddenly swerved, loud knocking started. Multiple system failures started flashing. Forward collision, ECS, traction control, the car was vibrating, jerky. I have multiple videos as well. The dealership literally told me they’d seen a ton of these when I called immediately and then told me to keep driving because the damage was done and if the engine died well then it’s under warranty. I have…
Had electrical trouble with your 2021 Chevrolet Suburban?
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 2021 Chevrolet Suburban?
It's a meaningful issue. 12 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 12 complaints filed, electrical issues most often appear around 88,000 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/2021/Chevrolet/Suburban.
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.