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severe 38 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Of the 38 electrical complaints filed for the 2008 Pontiac Grand Prix, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
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.
Electrical accounts for 27% of all owner complaints filed against this vehicle, across 10 categories tracked.
No new NHTSA electrical complaint has been filed on this vehicle in over 11 years — the issue may be aging out of the active population.
If the key is not in the run position, the air bags may not deploy if the vehicle is involved in a crash, increasing the risk of injury.
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 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 ↗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.
Owners describe a cascade of electrical failures in the 2008 Grand Prix. The ignition system is the most common culprit: vehicles stall without warning at traffic lights and while driving, then refuse to restart for 10 to 40 minutes. The problem worsens in warm weather and gets progressively worse over time. Coils and ignition modules burn out repeatedly, with one owner replacing them three times in a year.
Fuse box overheating and fire is the most alarming pattern. Owners smell burnt electrical odor, open the hood to find the fuse box smoking or actively burning, with low beam relays melted beyond recognition. In one case, the fuse box ignited while the vehicle was parked overnight. These are active fire hazards.
The manufacturer's 2014 recall (14V400) involved inserting a plastic ring around the key and a rubber insert into the ignition slot. Owners universally report this fix was ineffective—the rubber insert falls out within days, stalling continues unabated, and some VINs were excluded from the recall entirely. Dealers struggled to obtain replacement parts even years later.
Secondary failures abound: headlights quit on low beam, airbag sensors malfunction, remote start vanishes after battery replacement, and throttle pedals lose force while driving. One owner became trapped in the vehicle when the entire electrical system died at an intersection during summer heat. Multiple owners report independent mechanics cannot diagnose the root cause.
Same Pontiac Grand Prix electrical reports on nearby years: 2005 · 2006 · 2007
Ignition switch unintentionally moves to 'Run' position while driving or stalled vehicle fails to restart. Vehicle loses power and restarts after waiting several minutes to 40 minutes. Failure worsens in warmer weather. Owners report waiting 10–40 minutes between restart attempts. Ignition coils and ignition control modules fail as a result.
When: Various mileage; 50,000–194,000 miles reported; worsens over time
Symptoms owners cite: Engine stalls without warning while driving; Vehicle dies at red lights; Engine fails to start on first attempt; Requires multiple restart attempts with long waits (10–40 minutes) between attempts; Ignition switch turns to 'Run' position unintendedly; More frequent in warm weather
Repairs/costs cited: Ignition module replacement ($360 mentioned for gas pedal sensor in one case; ignition module, coils, and control module replacement reported); Recall 14V400 involved inserting plastic ring in key and rubber insert in ignition slot—ineffective per owners
Recalls/TSBs owners mention: NHTSA Campaign 14V400000 (Electrical System); parts unavailable for many owners; plastic key ring + rubber insert attempted fix proved ineffective; some VINs excluded from recall coverage
Fuse box overheats, melts, and catches fire while driving or parked. Low beam relay melts and fuses to wiper relay. Wiring harness overloads. Plastic components in fuse box cover melt and burn. Fire extinguished manually in at least one case.
When: 41,000–181,000 miles; one incident occurred while parked overnight
Symptoms owners cite: Burnt electrical smell from engine compartment; Smoke under hood; Fuse box catches fire or begins to ignite; Low beam relay burnt beyond recognition and fused to wiper relay; Melted spots on top of fuse box; Plastic dust residue from burnt components
Repairs/costs cited: Fuse box replacement required; wiring harness replacement required; owner reported replacing entire fuse box due to burnt damage; one owner disconnected battery cable to prevent further damage
Recalls/TSBs owners mention: Manufacturer notified in some cases; no recalls issued for fuse box fire; one owner noted that recall 14V400 could not be performed until fuse box issue was repaired first
Body control module provides ground circuit for multiple electrical functions. Repeated fuse blows for front park lights and tail lights. Simply replacing fuse does not fix problem. Risk of wiring harness overload and fire.
When: Unspecified mileage
Symptoms owners cite: Fuse for front park lights and tail lights blows immediately; Fuse blows when turning ignition to 'On' position; Fuse blows when activating headlights via multi-function switch; Lights non-functional at night and in low-light conditions; Multiple electrical component failures and warning light flickering
Repairs/costs cited: Body control module diagnosis recommended by complainant; fuse replacement does not resolve issue; complete fuse block replacement may be necessary
Recalls/TSBs owners mention: Manufacturer problem notification recommended; no specific recall mentioned for body control module
Low beam headlights fail to operate on low setting; work fine on high beam. Failure intermittent—dims work at times then go off when vehicle hits bump. Low beam relay melts. Dimmer switch replacement does not fix issue.
When: ~30,000 miles on one vehicle; ongoing from 2008 onward
Symptoms owners cite: Low beam headlights non-functional on dim setting; Headlights work on high beam only; Intermittent failure—lights go off on bumps or at random; Low beam relay overheats and melts; Burnt smell from engine compartment when relay fails
Repairs/costs cited: Dimmer switch replacement (did not resolve); low beam relay replacement; fuse box replacement; one owner reported $700 repair (ignition coil and module replacement, likely secondary to relay failure)
Recalls/TSBs owners mention: No manufacturer response or recall for headlight dimmer issues
Entire electrical system shuts down without warning while vehicle is in motion. Loss of power steering, window operation, door locks, horn, and emergency flashers. Vehicle becomes inoperable and operator trapped.
When: One incident reported June 2014 after 7–8 years ownership; mileage not stated
Symptoms owners cite: Complete electrical system loss; Power steering inoperative; Windows and doors inoperative; Horn inoperative; Emergency flashers inoperative; Air conditioning inoperative; Vehicle window broken to remove trapped driver
Repairs/costs cited: Vehicle towed; no repair details provided
Recalls/TSBs owners mention: Recall 14V400 notification not received by owner despite years of ownership
Remote start function stops working after battery replacement at dealer. Feature disappears from vehicle instrument cluster despite being listed in owner's manual. Dealer unable to diagnose or repair after six visits.
When: After battery replacement; unspecified mileage
Symptoms owners cite: Remote start function quits after battery service; Remote start disappears from vehicle DIC display; Remote start listed in owner manual but non-functional
Repairs/costs cited: Dealer unable to fix; six service visits without resolution; issue investigated during ignition switch recall work but not repaired
Recalls/TSBs owners mention: No resolution despite recall 14V400 service visit
Passenger airbag weight sensor cycles on and off intermittently when a passenger of normal weight (150–200+ lbs) occupies the seat. Sensor reset does not resolve issue. Dealer quotes $900 for repair out of warranty.
When: Unspecified mileage; out of 4-year warranty
Symptoms owners cite: Airbag warning light illuminates while parked; Passenger airbag sensor cycles on/off with passenger in seat; Intermittent false warnings
Repairs/costs cited: Module reset attempted but ineffective; no error codes retrieved; dealer quote $900 for repair; repair not covered under New York State Lemon Law warranty
Recalls/TSBs owners mention: No manufacturer coverage; independent mechanic unable to resolve; one consumer asked if covered under GM warranty
Accelerator pedal force reduces intermittently while driving at highway speed (55 mph). Pedal becomes unstable and requires re-pressing to restabilize. Described as electrical problem with throttle pedal and seat.
When: Ongoing since purchase; incident at 55 mph
Symptoms owners cite: Pedal force reduces on motion; Throttle pedal becomes unstable while driving; Requires re-pressing pedal to restabilize; Pedal sticks or hesitates while in motion
Repairs/costs cited: Dealership under warranty said nothing wrong; independent mechanic diagnosed electrical throttle pedal issue
Recalls/TSBs owners mention: Dealership warranty denial
Vehicle hesitates, stalls, shakes, or lurches forward when accelerating. Reduced engine power warning light illuminates. Vehicle limited to 15 mph max speed. Stability/traction control sensor light comes on. Issue undiagnosed during warranty period despite multiple dealer visits.
When: Within 9 months of purchase (22,000 miles); persists to 34,000 miles
Symptoms owners cite: Engine hesitation when pressing accelerator; Vehicle stalls or shakes while accelerating; Vehicle lurches forward unexpectedly; Reduced engine power warning light; Stability/traction control sensor light on; Vehicle speed capped at 15 mph when warning active
Repairs/costs cited: Multiple dealer visits; unable to duplicate problem during warranty; eventually diagnosed as faulty gas pedal sensor ($360); also needed front right outer tie rod ($285)
Recalls/TSBs owners mention: GM evaluation ongoing for potential reimbursement; dealership stated under warranty no action if no codes or broken parts
Anti-theft deterrent system fails to recognize and enable replacement keys provided as part of ignition recall repair. Vehicle will not start even after reset procedures per GM. Replacement keys from dealer (coded by city motor) rejected by electronic control module.
When: After recall key replacement
Symptoms owners cite: Vehicle will not start with new recall keys; Anti-theft system rejects new keys; Electronic control module blocks vehicle start
Repairs/costs cited: Reset procedures per GM ineffective; dealer coded keys rejected by system
Recalls/TSBs owners mention: GM reset procedures provided but did not work
Low beam headlights fail to operate when vehicle started. Interior lighting remains illuminated even after vehicle is turned off. Vehicle stalls while driving.
When: 99,000 miles
Symptoms owners cite: Low beam headlights do not work when vehicle started; Interior lights stay on when ignition off; Vehicle stalls while driving
Repairs/costs cited: Not diagnosed or repaired
Recalls/TSBs owners mention: Manufacturer stated VIN excluded from recall 14V400000; no alternative solution offered
Low beam headlights suddenly quit without warning while driving at speed. High beam headlights function normally. Intermittent low beam relay failure related to GM recall 14291 concerning sudden HDM failure.
When: Unspecified mileage
Symptoms owners cite: Low beam headlights suddenly fail while driving; High beam headlights work normally; No warning before failure
Repairs/costs cited: Not repaired
Recalls/TSBs owners mention: GM Recall 14291 (headlight display module) exists but does not cover 2008 Pontiac Grand Prix; under investigation per owner
Ignition coil becomes faulty and causes ignition module to fail. Vehicle stalls, coils and ignition control module burn out (fried). Issue recurs repeatedly—one owner had same failure three times in one year. Repair costs $700 or more.
When: Multiple incidents over time; July 2014, Dec 2014, one year later; 39,000–90,000 miles
Symptoms owners cite: Vehicle stalls while stopped at light or while driving; Ignition coil fried beyond use; Ignition control module fried; Multiple coil pack failures; Blown fuses
Repairs/costs cited: $700 repair cited (ignition coil, 2 ignition coils, ignition control module replacement); repair repeated multiple times within 18 months in one case
Recalls/TSBs owners mention: No manufacturer involvement or recall for coil/module failures
Front and side airbags did not deploy during vehicle accident when struck by truck on side while turning left. Vehicle had electrical and OnStar issues at time of accident.
When: Unspecified mileage
Symptoms owners cite: Front airbags failed to deploy; Side airbags failed to deploy; OnStar issues concurrent with electrical problems
Repairs/costs cited: Not repaired in complaint narrative
Recalls/TSBs owners mention: No manufacturer response documented
Headlights randomly come on while vehicle is turned off and parked. Loud fan noise heard under hood while vehicle off. Both electrical systems activate without ignition key.
When: Overnight parking
Symptoms owners cite: Headlights come on randomly with vehicle off; Loud fan blowing noise from under hood; Both systems activate without key in ignition
Repairs/costs cited: Not repaired; recent complaint with limited detail
Recalls/TSBs owners mention: No response documented
Synthesized from 38 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
Tl* the contact owns a 2008 Pontiac grand prix. The contact stated that the vehicle's speed reduced and smoke appeared under the front passenger side hood. The contact also stated that the gauges fluctuated and all the warning lights and the interior lights flickered. The vehicle was towed to a dealer who diagnosed that unknown wires were melted. As a result, the fuse block and the engine harness…
This vehicle keeps blowing the fuse for front park lights and tail lights. Without lights, cant drive vehicle at night or low light, inclement weather conditions. Initial investigation/troubleshooting leads to faulty body control module. The body control module provides ground circuit for multiple electrical functions on vehicle. This problem could result in vehicle wiring harness overloading…
Upon starting of the car under normal conditions, noticed a slight burnt electrical smell, after inspection of the engine compartment, I did not notice any smoke or obvious signs, and the smell went away, this happened twice while out shopping at various places. On the final leg of the trip on the way home, I noticed the smell becoming more apparent, and the smell was noticeable at traffic light…
2008 Pontiac grand prix lost total power to the car. Discovered that the ignition module had gone bad. *mw the consumer stated it wasn't until after the repair shop replaced the ignition module and did a maintenance check ride, they discovered the source of the ignition module failing, was the ignition coil, which also had to be replaced. *jb
Since I bought the car, I noticed on motion the force on the pedal started reducing. When it happens I repress it again which will become stable at that particular time. Will got stuck while in motion( 55mpr). I took to the dealership they told me nothing wrong with the car, and then I was under warranty. This morning I took it to mechanic, they told me it's electrical problem with throttle pedal…
I purchased a 2008 Pontiac grand prix in march 2014 and shortly after when I tried to start it it didn't want to start. This has happened probably 10-15 times a month give or take maybe more seeing as I'm not the only one who drives it so I don't know but I know it's about 10-15 times a month for me. When this happens I have to give it gas to get going so I'm not stranded someplace and I'm not…
2008 Pontiac grand prix, total ignition failure, while driving without warning. Vehicle has only 39000 miles, and was properly maintained. There was no check engine light. Repair was to change ignition module and three coil packs. The fuse was also blown. *tr
I was driving at dark hours with headlights on and lights just went out. Turned on bright lights and the lights worked. Turned back to dim and lights worked for about half a mile.lights went out again turned on brights and same thing as before the lights worked. I thought I seen somewhere a recall was issued for this problem. I guess I didnt.
It's a meaningful issue. 38 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
Across the 28 complaints that reported odometer mileage, most electrical failures cluster between 63,500 and 150,000 miles, with the median around 90,000. A quarter of owners report trouble before 63,500; a quarter make it past 150,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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.
Yes — 1 active recall(s) cover electrical issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.