This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.
full bulletin at NHTSA ↗2008 Pontiac G6 electrical problems
severe 177 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
177
Recalls
0
Avg fix
$850
3crashes
6fires
3injuries
When does it fail?
Of the 177 electrical complaints filed for the 2008 Pontiac G6, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Of the 6 model years of Pontiac G6 we track for electrical problems, this one carries the most owner complaints on file — 177.
Owners have filed 177 electrical complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
full bulletin at NHTSA ↗Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.
full bulletin at NHTSA ↗This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
full bulletin at NHTSA ↗This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2008 Pontiac G6 electrical system exhibits chronic, recurring failures across multiple critical systems. Brake lights stay illuminated while driving and turn off when brakes are applied—the reverse of proper operation—a pattern that recurs within days to months even after dealer repairs involving brake switch replacement, sensor recalibration, BCM work, and connector fixes. Owners report near-miss rear-end collisions and at least one documented accident linked to this defect.
Headlight low-beam connectors and wiring harnesses melt, corrode, or fuse repeatedly. Bulbs fail 4–6+ times per year on the same housing; owners describe visible burn marks, melting plastic, and burning electrical smells. The dealer network acknowledges this is "common" but offers no recall or permanent solution—one dealer proposed a jury-rigged splice from a GMC Acadia.
Rear door lock actuators fail to lock or unlock from the driver's master switch, leaving rear-seat occupants (including children) unable to exit normally. The ignition system also affects brake light operation: the body control module causes voltage fluctuations that disable the brake pedal sensor, which controls whether brake lights work. Even after BCM replacement, the issue returns.
Additionally, dome lights drain batteries, door ajar sensors trigger false warnings, water intrusion causes mold growth, key fobs stop working, and electrical shorts create fire hazards. Owners cite multiple recalls (13036, 14V252000) for these same issues, yet repairs fail to resolve them permanently. Costs are borne entirely by owners once warranty expires—brake sensor replacements alone run $120 per occurrence, and headlight work reaches $400–700.
Same Pontiac G6 electrical reports on nearby years: 2005 · 2007 · 2009 · 2010
Failure modes owners describe
Brake lights stay on while driving; turn off when brakes applied
Brake lights remain illuminated during normal driving without driver pressing brake pedal. They extinguish when brake pedal is pressed, then cycle on again. Often accompanied by traction control light illumination and reduced brake responsiveness. Multiple repairs (brake light switch replacement, brake pedal position sensor replacement, BCM replacement, connector repairs) have failed to permanently fix the issue. Problem recurs within days to months of repair.
When: Throughout ownership; recurring at 75,000 miles and beyond; incidents from 2010 onward
Symptoms owners cite: Brake lights illuminated while driving without pedal pressure; Brake lights turn off when brake pedal pressed; Service traction control light displayed on dash; Traction control disengages; Cruise control will not engage or disengages; Reduced brake responsiveness; Electronic stability control light illuminated; Brake pedal pressure reduced
Codes mentioned: C0277 (brake pedal position sensor defective)
Repairs/costs cited: Brake pedal position sensor replacement ($120 typical); brake light switch replacement; BCM recalibration; EBCM to brake light switch connector repair; brake switch replacement and computer reprogramming (multiple attempts, $200+ per attempt)
Recalls/TSBs owners mention: NHTSA Campaign 14V252000 (electrical system, exterior lighting, vehicle speed control, electronic stability control); remedy included jump harness and BCM re-greasing, which proved ineffective; some owners report recall was extended to 2008 models after initial exclusion
Rear door lock actuators fail to lock/unlock electrically
Rear door lock actuators malfunction intermittently or permanently. Doors will not lock or unlock from driver's side master control switch or door-mounted switches. Manual door lock knobs must be used instead. Problem worsens over time from occasional failures to complete non-functionality. Affects child safety and emergency egress, as rear-seat occupants become trapped or locked in without manual workaround. Power window control is required to lower window and manually unlock from outside, or passenger must crawl to reach manual knobs.
When: 58,000 to 83,000 miles on tested example; issues reported from 2011 onward; gradual deterioration over time
Symptoms owners cite: Rear driver's side door will not lock/unlock from master switch; Rear passenger's side door will not lock/unlock from master switch; Door lock feature works erratically, intermittently; Manual door lock knobs only reliable method; Door lock feature fails to engage when vehicle placed in gear; Key fob does not work for rear doors
Repairs/costs cited: Door lock actuator replacement (cost prohibitive for many owners; one estimate cited $550 for BCM + $300 for door latches); remote key fob programming fee ($100); BCM replacement required in some cases
Recalls/TSBs owners mention: No recalls identified; GM contact available but owners cite need to pay for diagnostic before reimbursement, which many cannot afford
Headlight low-beam connector and wiring harness melt or corrode
Low-beam headlight wiring harnesses and connectors overheat, melt, corrode, or fuse together. Bulbs fail repeatedly within weeks to months. Some owners replace bulbs 4-6+ times per year. Connectors exhibit visible burn marks, melting, and discoloration. Wires short out internally. Problem occurs on both driver and passenger sides. Owners report strong electrical burning smell before failure. Bulbs appear to work intermittently (flashing on/off when bumped or during speed bumps) before final failure. Fire risk cited due to excessive heat and electrical burning odor.
When: Summer 2010 onward; some mileage-related onset (100,000+ miles in one case), but many occur earlier; recurring throughout ownership
Symptoms owners cite: Low-beam headlight bulb burns out repeatedly; Connector melted or burned; Wiring harness melted or fused; Headlight works intermittently, fails when bumped or jarred; Light dims unexpectedly; Strong electrical burning smell from headlight area; Connector corroded; Bulb socket melted; Wire exposed or shorted; Light flashes on/off uncontrollably
Repairs/costs cited: Bulb replacement ($20–88 per occurrence); low-beam connector replacement ($212); new headlight assembly ($400–700); wiring harness replacement and reconfiguration; one dealer offered generic spliced-in harness from GMC Acadia as workaround
Recalls/TSBs owners mention: No recall identified; dealership noted problem is 'common' with G6; GM does not acknowledge as design defect
Dome light does not dim or turn off in auto mode
Dome light set to auto mode fails to dim and turn off automatically. Light remains on continuously after car is parked, draining battery after 12+ hours of non-use. Owners resort to leaving light in off position to prevent battery drain, resulting in dark car during night entry/exit.
When: Starting in 2011 in one reported case
Symptoms owners cite: Dome light does not dim in auto mode; Dome light remains on after 12+ hours of non-use; Battery drains due to continuous light operation; Auto mode function inoperative
Door ajar sensor malfunction; false door ajar warning messages
Door ajar warning message displays constantly on instrument cluster even when all doors are closed properly. Audible beeping warning sounds at random intervals, sometimes without message displayed. Causes distracted driving as driver checks doors and instrument panel. Creates concern that true door ajar condition will go undetected. Online research indicates door sensor issue.
When: Starting in 2011 in one reported case
Symptoms owners cite: Door ajar message displays constantly; Beeping warning sound occurs without message displayed; Warning beeps during driving; False alarm despite closed doors
Water intrusion and black mold inside vehicle
Water leaks into interior, accumulating on floorboards and under carpeting. Black mold grows extensively under carpets and on interior surfaces. Mold odor present inside vehicle. Problem persists or recurs within 8 months of dealer repair and cleaning. Owner reports illness with symptoms associated with black mold exposure. Recurring issue despite dealership intervention.
When: Ongoing since purchase; mold reappeared within 8 months of repair
Symptoms owners cite: Water accumulation on front passenger's side floorboard; Black mold under front and rear passenger side carpet; Mold odor inside vehicle; Water leaking in after rainy weather; Mold reoccurrence after previous repair
Repairs/costs cited: AC repair (repeated, three separate repairs in one case); carpet cleaning and replacement; affected electrical component: accelerator pedal position (APP) sensor damaged by water
Recalls/TSBs owners mention: GM dealership repaired leak and cleaned carpet initially but problem recurred; owner reports GM took 'lazy approach' and did not resolve underlying cause
Accelerator pedal position (APP) sensor failure
APP sensor fails or becomes damaged, often due to water intrusion into vehicle interior. Causes throttle control issues and electrical malfunction.
When: During water intrusion events
Symptoms owners cite: Throttle acceleration unresponsive or stuck; Sensor failure
Repairs/costs cited: Sensor replacement required after water damage
Body control module (BCM) voltage fluctuation or failure
BCM exhibits voltage fluctuations, fails to function properly, or develops internal faults. BCM controls multiple electrical systems including brake lights, traction control, and stability control. Replacement sometimes required. Fusible link failure between alternator and starter can occur. Recalibration of BCM needed after replacement.
When: Throughout ownership; voltage fluctuation issue noted in recall 13036
Symptoms owners cite: Traction control light illuminates; Electronic stability control malfunction; Brake light control failure; Cruise control failure; Voltage fluctuations affecting multiple systems; Internal fault within control module; Fusible link failure
Repairs/costs cited: BCM replacement (cost varies); BCM recalibration ($100+); fusible link replacement
Recalls/TSBs owners mention: Recall 13036 addresses BCM voltage fluctuation; Recall 14V252000 involves BCM repair; some owners report recall fix was ineffective (jump harness and re-greasing deemed inadequate)
Tail light and brake light bulbs melt at electrical contacts
Tail light and brake light bulbs melt at their electrical contact points. Wiring harness for trunk brake lights can also melt. Plastic socket holders melt from excessive heat. Problem occurs repeatedly on same bulb locations.
When: Throughout ownership
Symptoms owners cite: Brake light bulb melted at electrical contact; Tail light bulb melted at electrical contact; Plastic bulb socket melted; Excessive heat from bulb area
Repairs/costs cited: Bulb replacement; harness replacement in some cases
Brake pedal sensor repeatedly fails after replacement
Brake pedal position sensor fails and is replaced, but problem recurs within days to months. One online report cited six replacements at dealer. Sensor cost approximately $120 per replacement at dealership. Issue tied to BCM voltage fluctuations in recall documentation but repair not covered under recall for all model years.
When: Multiple replacements over ownership duration
Symptoms owners cite: Brake light control failure; Cruise control malfunction; Traction control light illuminated
Repairs/costs cited: Brake pedal position sensor replacement ($120 per occurrence at dealer); multiple replacements required for same customer
Recalls/TSBs owners mention: Brake sensor affected by BCM problem per recall 14V252000, but sensor replacement cost not covered for all model years or customers
Remote keyless entry (key fob) malfunction or non-functional
Remote keyless entry system fails completely or becomes intermittently non-functional. Key fobs will not program or work after programming attempt. Key fobs barely work or stop working after working initially.
When: Throughout ownership; worsening over time in some cases
Symptoms owners cite: Key fob will not unlock/lock doors; Key fob will not program; Key fob stops working after working initially; Remote keyless entry system inoperative
Repairs/costs cited: New BCM required in some cases; remote key fob reprogramming attempt by dealer ($100+); new remote key fob ($100)
Recalls/TSBs owners mention: Dealer states function is 'locked' and new BCM required at owner expense; no recall identified
Electrical system shorts, melted wiring, and fire hazard
Multiple instances of electrical wiring overheating, melting, or shorting. One owner reported car fire with explosion in front right quadrant after 9 years of ownership at low speed (less than 5 mph). Fireman cited possible short in electrical wiring too close to oil tank. No warning lights illuminated before failure. Multiple owners cite fire hazard concern due to melted connectors and wiring.
When: Isolated fire incident after 9 years; melting/shorting throughout ownership
Symptoms owners cite: Electrical wires melted or fused; Burning electrical smell; Engine compartment fire; Explosion in front of vehicle; Car engine burned; Front windows blown out
Repairs/costs cited: Wiring replacement; harness replacement
Check engine and electrical system warning lights; engine power reduced message
Engine power reduced message appears on message center. Check engine light illuminates. Accompanied by traction control light flashing. Issues indicate multiple electrical or engine control faults. Vehicle may stall or lose power temporarily.
When: Throughout ownership
Symptoms owners cite: Engine power reduced message displayed; Check engine light illuminated; Traction control light flashing
Airbag and seat belt warning lights remain on continuously
Service airbag light illuminates at startup and remains on during driving, turning off only when vehicle is off. Seat belt light (driver's side) illuminates and remains on continuously. Owner reports online that airbag will not deploy if light is on. Concerns center on loss of occupant safety protection.
When: Following recall service completion in one case; ongoing in others
Symptoms owners cite: Service airbag light on at startup; Service airbag light on during driving; Seat belt light on continuously; Lights turn off only when vehicle off
Repairs/costs cited: No successful repairs reported
Recalls/TSBs owners mention: No recall identified for this issue; dealership states no recall exists
Windshield wiper motor failure; wiper does not work
Windshield wiper motor fails or breaks internally. Wiper assembly does not function. Motor replaced multiple times (three replacements cited) without permanent resolution. Cost approximately $200 per replacement.
When: Throughout ownership; recurring failure
Symptoms owners cite: Wipers do not operate; Wiper motor snaps internally; Wiper motor fails
Repairs/costs cited: Windshield wiper motor replacement ($200 per occurrence; three replacements=$600 total in one case)
Tire pressure monitoring system (TPMS) sensor malfunction
TPMS sensors mismatched to tires. Sensor assigned to one tire reads pressure from different tire (e.g., left rear sensor reads front right tire pressure). One sensor does not read any tire pressure. Owner cannot determine actual tire pressures without external pressure gauge. Malfunction appears to occur randomly.
When: Occurred randomly during ownership
Symptoms owners cite: Tire pressure sensor mismatched to tire; Incorrect tire pressure readings displayed; Tire sensor reads no pressure despite tire present
Transmission shifting hard; transmission control issues
Transmission shifts hard. Vehicle loses reverse function or fails to move when gear selected. Transmission fluid low or internal issues. Linked to throttle sensor or transmission cable problems in owner assessment. Some complaints indicate this is related to BCM recall issue (14V252000 for transmission and BCM).
When: Throughout ownership; intermittent to constant
Symptoms owners cite: Hard shifting; Vehicle will not shift into reverse; Vehicle will not move when in drive or reverse; Transmission does not respond to gear selection
Repairs/costs cited: Transmission fluid top-up; possible throttle sensor or cable repair
Recalls/TSBs owners mention: BCM recall 14V252000 relates to transmission issues; dealership reluctant to perform recall repair due to uncertain warranty coverage for parts and labor
Vehicle stalls; starter engages independently
Vehicle stalls while driving at highway speed (65 mph) or city speed (5 mph). Starter motor engages independently without driver action, creating fire hazard concern. Vehicle restarts after stalling. Check engine warning illuminates after independent starter engagement.
When: At 98,000 miles in one case
Symptoms owners cite: Vehicle stalls during driving; Starter engages independently; Check engine light illuminates; Rough engine operation
Recalls/TSBs owners mention: Vehicle not diagnosed or repaired; manufacturer not notified
Driver's side door electrical harness malfunction
Electrical harness serving driver's side door does not function properly in any capacity. Door locks blow fuses when button pressed. Trunk pop button does not work (but key fob trunk open does). Passenger window operation impaired. Radio stays on even after vehicle off and keys removed.
When: Ongoing
Symptoms owners cite: Door locks blow fuses when button pressed; Trunk pop button non-functional; Passenger window malfunction; Radio remains on after vehicle shut off
Turn signal failure or malfunction
Turn signal bulbs or circuitry fail. Turn signal does not operate, creating safety hazard for other drivers. Problem may be related to headlight wiring and connector issues affecting adjacent circuitry.
When: November 2023 and ongoing
Symptoms owners cite: Turn signal does not work; Turn signal light does not illuminate
Repairs/costs cited: Turn signal wiring replaced; zip tie used to secure harness
Synthesized from 177 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Low beam headlight (driver side) goes out randomly. Have replaced bulbs and it happens again a few days later. After a few more days it goes out again and then a few more days it comes back. I have removed headlight assembly and used electric tape to hold wires together tightly but it still occurs. Seems to be a common problem with g6s based on all the problems posted on the internet. Last…
Beginning on nov 17, 2013 and up until present, the driver's side headlight of my 2008 Pontiac g6 continues to burn out. The first incident caused me to get a traffic ticket for driving an unsafe vehicle. The ticket is the way I initially discovered the problem. The very next morning after receiving the ticket, I immediately changed the headlight. To my dismay, the headlight went out again…
Had electrical trouble with your 2008 Pontiac G6?
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 2008 Pontiac G6?
It's a meaningful issue. 177 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Across the 134 complaints that reported odometer mileage, most electrical failures cluster between 61,438 and 100,000 miles, with the median around 80,000. A quarter of owners report trouble before 61,438; a quarter make it past 100,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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/2008/Pontiac/G6.
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.