Owners report widespread electrical problems that start early and persist. The most common complaint is battery drain—vehicles go completely dead after short periods with ignition off, sometimes after just 10 minutes of radio use. Dealers cannot pinpoint the cause even after replacing batteries and alternators; parasitic draw tests come back negative because the problem is intermittent. Some owners have dealt with this for years, draining batteries repeatedly.
Instrument clusters fail frequently. Speedometers display dangerously inaccurate readings—one owner found themselves going 120 mph while reading the gauge, unaware of actual speed. Instrument panel brightness is inadequate for daylight driving. GM/Delphi settled a defect affecting 1.1 million electronic parts in clusters, though not all 2007 models were covered.
Wiring harnesses deteriorate and chafe, creating fire hazards. Owners report burning smells, smoke under the hood, exposed wires, and console fires. One vehicle parked in a driveway caught fire from a relay box with no keys in the ignition. Door locks fail and trap occupants; A/C blower motors overheat and burn; lighting systems short repeatedly despite bulb replacement. Rear windshield wipers activate on their own; radio and entire panels go out. One owner's harness rubbed the drive shaft, draining the battery and burning out the air compressor. These failures occur across the ownership lifespan and mileage range.
Failure modes owners describe
Battery drain (parasitic draw)
Battery goes completely dead after short periods of inactivity—sometimes within minutes of turning off the ignition with radio on, sometimes after days or weeks of sitting. Problem recurs intermittently. Owners have replaced batteries and alternators multiple times; testing shows both components working properly. One owner reported seven occurrences in less than a year.
When: Occurs sporadically; can happen regardless of mileage or whether vehicle is driven
Symptoms owners cite: Battery completely dead after engine off, radio playing; Battery drains while vehicle is parked overnight or stationary; Repeated dead battery within days or weeks after recharging; Battery drained immediately during TPMS reprogramming attempt; No warning lights or indicators
Repairs/costs cited: Dealers unable to reproduce problem or identify root cause; parasitic draw test returns negative due to intermittent nature. One owner spent $300+ on parts and repeated mechanic diagnostics without resolution. Dealership quoted $99+ to attempt repair.
Instrument cluster failure (speedometer/gauges/illumination)
Speedometer displays inaccurate readings or becomes inoperable. Instrument panel brightness insufficient for daytime visibility. Entire instrument cluster becomes inoperable or gauges cease functioning. Affected by Delphi electronic parts defect; GM settlement covered 1.1 million defective electronic parts in instrument clusters.
When: Can occur early in vehicle life; reported at 1,500, 40,000, 62,200, 70,000, 80,000, 108,000, 130,000 miles
Symptoms owners cite: Speedometer reads significantly higher than actual speed (vehicle going 90 mph but reading 120 mph); Instrument panel gauges inoperable; Instrument panel too dim to read during daylight; Cannot adjust brightness to correct problem
Repairs/costs cited: Replacement instrument cluster required. GM/Delphi settlement (Special Coverage Adjustment #07187A) covered parts and labor through 2014, but some 2007 models were not listed despite having same manufactured parts as earlier model years.
Recalls/TSBs owners mention: Special Coverage Adjustment #07187A; GM received $47.5 million and Delphi provided 1.1 million replacement parts at no charge through 2014. Some owners had difficulty qualifying for coverage.
Electrical harness chafing and fire
Main wiring harness deteriorates, chafes, or shorts—causing burning smells, smoke, exposed wires, and fire risk. Harness located near lift gate/fuse box or underneath vehicle near drive shaft. One incident involved harness rubbing on drive shaft from mounting issue.
When: Reported at 80,000, 132,000 miles; one parked vehicle fire at 320,000 miles; one parked vehicle fire at 186,601 miles
Symptoms owners cite: Strong burning rubber or electrical odor while driving; Smoke visible under hood or inside cabin; Exposed wires; Fire under hood or in console area; All warning indicators illuminate
Repairs/costs cited: Main wiring harness replacement required. One owner did not repair after diagnosis. One vehicle was destroyed by fire and towed (owner stated vehicle was parked with engine off and ignition off when fire started). Dealership repair estimate mentioned but not completed in some cases.
Recalls/TSBs owners mention: Campaign 10V240000 (Electrical System) addressed some wiring issues. Manufacturer notified but repair assistance varies.
Reduced engine power/throttle body faults
Vehicle loses power during driving and illuminates reduced engine power indicator. Throttle body and brake switch require replacement initially; then ECM connector wiring and harness require replacement. Problem recurs after repairs. Dealer unable to duplicate problem initially.
When: 67,200 miles
Symptoms owners cite: Vehicle shakes at startup; Check engine light illuminates; Vehicle slows down unexpectedly while driving at various speeds; Reduced engine power indicator illuminates; Risk of collision (nearly T-boned by tractor-trailer)
Repairs/costs cited: Throttle body replaced; brake switch replaced; ECM connector wiring replaced; wiring harness replaced. Problem recurred after dealer repairs multiple times. Manufacturer notified.
Recalls/TSBs owners mention: Manufacturer made aware of recurring failure after multiple repairs.
A/C blower motor overheating and burnout
Air conditioning blower motor overheats and burns without warning. Burned motor damages wire harness and control module. Blower can fail intermittently or suddenly, making A/C inoperable.
When: 62,200 miles reported in one case
Symptoms owners cite: A/C becomes inoperable without warning; No warning indicators; Concern of potential fire; A/C runs intermittently; A/C blows very hot air
Repairs/costs cited: Blower motor, control module, and wire harness replacement required. Repair completed at dealership.
Recalls/TSBs owners mention: Manufacturer notified; contact told to file NHTSA complaint.
Radio and instrument panel electrical failure
Radio and entire instrument panel fail simultaneously or individually. May be accompanied by gasoline odor. Failure cannot be reproduced at dealer; no repair completed in some cases.
When: 70,000 miles in one documented case
Symptoms owners cite: Radio fails to operate; Entire instrument panel non-functional; Gasoline odor while driving; Intermittent failures
Repairs/costs cited: Throttle body sensor replacement attempted but failure recurred. Dealer unable to locate issues with radio on second inspection. Vehicle not repaired.
Recalls/TSBs owners mention: Manufacturer notified but provided no assistance.
Tire pressure monitoring system malfunction
TPMS displays false low-pressure warnings for years, indicating all tires low when they are properly inflated. Problem persists despite system resets and diagnostics. TPMS became inoperable when owner attempted reprogramming due to battery drain.
When: Reported over multiple years; low mileage vehicle (18,224 miles) also affected
Symptoms owners cite: TPMS light illuminates; Message center indicates all tires low when gauges show proper pressure; Intermittent display of false warning; Check engine light remains on despite resets
Repairs/costs cited: Problem temporarily addressed but tests and code resets have not resolved check engine light. Battery drain prevented TPMS reprogramming completion.
Door lock and window control electrical failure
Driver-side door electrical harness fault causes window controls and door locks to malfunction. Door locks activate involuntarily, trapping occupants. Window won't lower. Other door controls inoperable.
When: Multiple years of ownership reported in one case; described as ongoing since vehicle purchase
Symptoms owners cite: Driver door window will not lower; Door controls malfunction; Door locks itself involuntarily with keys inside; Door harness fault confirmed by mechanic
Repairs/costs cited: Multiple technicians identified as electrical issue, not switch failure. One case involved infant trapped in locked vehicle for 10+ minutes on 80-degree day.
Lighting system shorts and bulb failures
Faults and shorts in electrical harnesses cause premature bulb failures in headlamps and brake lights. Owners replace bulbs and fuses repeatedly; shorting recurs. Entire electrical harness system may require replacement.
When: Issue noted as ongoing since model launch per forum discussions
Symptoms owners cite: Headlamp failure; Brake light failure despite new bulbs; Rear passenger tail light short; Dome light non-functional; Lights fail again after replacement
Repairs/costs cited: Multiple bulb and fuse replacements required. Dealership states entire electrical harness system needs replacement. One owner quoted $475+ for diagnosis of short in dome light circuit.
Recalls/TSBs owners mention: Dealership confirms known issue with supplier quality; GM forums indicate ongoing issue since model launch.
Wiring harness mounting/abrasion damage
Wire harness underneath vehicle rubs on drive shaft due to improper mounting or wear, causing shorts and multiple electrical failures. Results in battery drain, compressor burnout, stability control warnings, and other electrical issues.
When: Mileage not specified
Symptoms owners cite: Battery drain; Air ride compressor burning out; Stability control warning light; Various electrical failures; Burning smell from air vents
Repairs/costs cited: Harness-to-drive-shaft contact identified as root cause; proper repair would require harness relocation/securing.
Control relay box fire
Engine compartment fire originating from control relay box attached to left side fender wall. Vehicle parked with engine off and ignition off when fire erupted.
When: 320,000 miles on vehicle; ignition off and engine off at time of fire
Symptoms owners cite: Massive fire in engine compartment; Fire originating from control relay box
Repairs/costs cited: Vehicle damaged; fire department responded. Initial investigation indicated electrical fire source.
Recalls/TSBs owners mention: Manufacturer notified by fire/police at scene.
Remote start system malfunction
Remote start feature, advertised as key selling point of vehicle, does not function. Owner purchased vehicle specifically for this feature.
When: Feature inoperable from time of use
Symptoms owners cite: Remote start does not engage; Feature marketed but non-functional
Repairs/costs cited: No repair information provided in complaint.
Engine stalling at startup
Vehicle starts but engine stalls immediately upon startup. Problem persists after starter replacement.
When: Mileage not specified
Symptoms owners cite: Engine starts but stalls immediately; Electrical clicking noises (reported in one case)
Repairs/costs cited: Starter replaced without resolving issue, suggesting electrical or fuel system problem rather than mechanical starter failure.
Synthesized from 47 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.