| 1 | 0 | 3 | 4 | 3 | 4 |
Pontiac Grand Prix repairs by problem area
Engine (40%)
Transmission and Drivetrain (10%)
Brakes and Traction Control (12%)
Suspension and Steering (18%)
Electrical and Air Conditioning (14%)
Paint, Rust, Leaks, Rattles, and Trim (3%)
Other (4%)
Chart based on 308 repairs.
Pontiac Grand Prix engine repair cost distribution
$2500+ (3%)
$1000 - $2499 (4%)
$500 - $999 (19%)
$100 - $499 (39%)
< $100 (34%)
Chart based on 114 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2008 Pontiac Grand Prix 4dr Sedan
303-horsepower 5.3L V8 4-speed shiftable automatic FWD
| 50000 mi US $235 |
Speed sensor failure. Could have been due to a pot hole hit but not sure. |
2006 Pontiac Grand Prix
Engine not specified
| 111000 mi US $460 |
Bad cat converter. It was replaced |
2006 Pontiac Grand Prix 4dr Sedan
supercharged 260hp 3.8L V6 4-speed automatic FWD
| 69500 mi US $360 |
Water pump was leaking |
| 85000 mi US $500 |
Oil leak from valve cover gaskets |
| 97000 mi US $400 |
replace heater core |
| 31643 mi | Problem: Check Engine Light On Intermittently. Cause: Input Speed Sensor. Solution: Replaced Sensor. (Under Warranty) |
2006 Pontiac Grand Prix 4dr Sedan
303-horsepower 5.3L V8 4-speed shiftable automatic FWD
| 155000 mi US $200 |
Radiator side tank cracked. Replaced radiator. |
2006 Pontiac Grand Prix 4dr Sedan
200-horsepower 3.8L V6 4-speed automatic FWD
| 5100 mi | Serpentine belt chirp/squeak/squeal. Lubed belt under warranty. |
| 9000 mi | Serpentine belt chirp/squeak/squeal. Cleaned belt and all pulleys due to glazing, replaced belt tensioner under warranty. |
| 225000 mi US $15 |
Extended warm-up. CEL showed, code stated coolant temp lower than expected. Replaced thermostat, engine warms up as it should, no CEL repeats. |
| 149000 mi US $200 |
Water pump seal beginning to seep. Noticed when performing oil change. Replaced water pump, accessory drive belt and thermostat. |
| 190700 mi US $240 |
Replaced catalytic converter due to foul exhaust odor. Engine uses about a quart of oil between oil changes. |
| 200000 mi US $175 |
Plastic coolant elbow leaking coolant down pulley end of engine due to age/fatigue. Replaced with aluminum elbow. Replace intake and exhaust crossover gaskets also. |
| 206000 mi US $100 |
Coolant seepage from timing gear cover gasket. Replaced timing gear cover gasket, oil and filter. |
| 71000 mi US $230 |
water pump leak |
| 111000 mi US $200 |
car would hesitate when trying to use passing speed |
| 121000 mi US $600 |
Dexcool decomposed into a thick, mud like fluid. Needed radiator flushed, new heater core, and replaced water pump. |
2005 Pontiac Grand Prix
Engine not specified
| 32240 mi C $400 |
Engine would shut down while driving resulting in loss of power steering and brakes. Dealer replaced gas pedal sensor due to diagnostic codes. While attempting to drive car home from the dealer the engine shut down again while driving Without any warning the engine would shut down while driving, resulting in loss of power steering and power brakes. This time the dealer replaced the Powertrain Control Module PCM |
2005 Pontiac Grand Prix 4dr Sedan
supercharged 260hp 3.8L V6 4-speed automatic FWD
| 78000 mi US $5 |
Check engine light came on. Pushed OnStar and talked to technician. Said problem was EGR valve. Removed and cleaned EGR and vehicle running great now. |
| 179000 mi US $140 |
replaced water pump |
2005 Pontiac Grand Prix 4dr Sedan
303-horsepower 5.3L V8 4-speed shiftable automatic FWD
| 98000 mi US $50 |
check engine light= massive evap leak; replaced evap solenoid 50 bucks dealer part |
| 96000 mi US $45 |
The oil pressure sensor gave a check engine light. A dealer quoted me $240 for the repair. I bought the $45 part and swapped it myself in the Autozone parking lot in the dark in under 5 minutes. |
| 99700 mi US $400 |
Harmonic Balancer (crankshaft pulley) was out of balance. It was replaced. The labor was about 5 hours. Water pump began leaking and spraying water everywhere. It was replaced. |
| 35862 mi | Engine light with code P0171. Dealer repaired Oxygen sensor connector. |
2005 Pontiac Grand Prix 4dr Sedan
200-horsepower 3.8L V6 4-speed automatic FWD
| 73500 mi C $640 |
muffler was changed |
| 93000 mi C $500 |
Engine misfire, loss of power, engine vibration |
| 93860 mi C $650 |
Motor not warming up. Check engine. Faulty thermostat. Check engine (P0420).Cat-converter. Declined. Will take to another shop. |
| 104160 mi C $300 |
Check engine light (P0420). Replaced catalytic converter and one oxygen sensor. Replaced the two mufflers (N/C warranty). |
| 166780 mi C $280 |
Coolant was leaking, some overheating problems. The waterpump was replaced and problem went away. |
| 179800 mi | Exhaust leaking. |
| 163000 mi US $500 |
Replace coolant hoses |
| 175000 mi US $200 |
Replace ignition control module |
| 77500 mi C $275 |
Ignition coil cap wore enough that it was grounding and not sending adequate voltage to plug wires causing misfires and loss of power. |
| 126000 mi US $300 |
Died on start up and stall and massive hiccup on acceleration especially in cold weather. Fuel Pressure Regulator fit symptoms and is incorporated into Fuel Pump. Replaced Fuel Pump. After replacement check engine light on with O2 code. |
| 127000 mi | No heat. Flushing heater core fixed the problem. Found "clay" in hoses. A few weeks later no heat again. Flushed heater core again but didn't fix problem. Both upper and lower radiator hoses collapsing. Coolant is full. Still unresolved. |
| 108000 mi US $480 |
Reduced engine power with Check Engine light on. |
| 112000 mi US $858 |
Engine lost all coolant due to defective heater pulley assembly. |
| 106000 mi US $420 |
Stalled & died at traffic light. Replaced two ignition coil pacts and Ignision Program board. |
2004 Pontiac Grand Prix 4dr Sedan
supercharged 260hp 3.8L V6 4-speed shiftable automatic FWD
| 115000 mi US $130 |
Oxygen sensors replaced after engine light came on and indicated change. Thermostat replaced. Due to engine light code and diagnosis that it was stuck open keeping engine from heating up to standard operating temp. |
| 115200 mi US $170 |
Catalytic converter intenal components burnt up and caused PO420 engine code. Catalytic converter replaced with magnaflow non OE catalytic 3" exhaust connect custom fitted to OE 2.5" exhaust by shop Only $170 much cheaper than dealer repair |
| 125000 mi | Valve cover gasket oil leak. Discovered at trade in. Did not repair. |
| 153200 mi US $763 |
Car would not start. Towed to Elway Chevrolet. Fual pump found to be bad. Fuel pump replaced. Problem solved. |
| 160000 mi | Had to replace plug and plug wire due to engine miss. |
| 170000 mi US $247 |
Replaced catalytic converter Replaced spark plus and plug wires |
| 231000 mi US $745 |
Heater core leaking |
| 248000 mi US $635 |
Fluid leak. Radiator replaced |
| 262500 mi US $1788 |
Thermostat needed to be replaced. Causing check engine light Replaced MAP sensor due to error codes discovered when car was in for other service. Replacement part turned out to be defective and car had to be towed back to the shop. New sensor installed the next day fixed the problem |
| 307000 mi US $6459 |
Knocking noise from motor. Still running perfectly, but full diagnosis and repair was going to be expensive and made more sense to go with new motor. The rest of the car is still perfect! |
| 213000 mi US $300 |
Serpentine belt broke. |
2004 Pontiac Grand Prix 4dr Sedan
200-horsepower 3.8L V6 4-speed automatic FWD
| 139500 mi | Motor mount was worn. |
| 150000 mi US $370 |
Coolant leak caused by plastic elbows hidden under the alternator caused engine overheating and destroyed the thermostat. |
| 160000 mi US $60 |
Coolant elbow seals failed again. This time I repaired them myself and used RTV gasket maker and put in some GM coolant sealer. Time will tell if this issue is behind us. |
| 160000 mi US $26 |
Large EVAP leak detected. Computer suggested to "Check Gas Cap". Replaced with a ACDelco GT279 from Amazon. The error code returned a couple hundred miles later. |
| 160000 mi US $24 |
Haven't been able to narrow down the leak as of yet. Then the light went off on its own. The dealer thinks that it was a valve that was stuck open for a while. |
| 161000 mi US $40 |
Intermittent P0455 Gross EVAP leak code was coming up. Figured it was either the vent solenoid or purge solenoid. Replaced them both and the code went away and didn't come back. Took approximately 15 minutes to do with basic hand tools. |
| 197000 mi | Would not pass state emissions inspection due to SES light on. Replaced downstream O2 sensor and rusted out evap line. Also replaced fuel filter and rusty fuel lines. |
| 188000 mi US $145 |
Had to replace the lower intake manifold gaskets. Common problem |
| 232000 mi US $93 |
Heard a chirping noise under the hood a few days prior to water pump failure. Water pump locked up (bearing worn out) and shredded the belt. Had to have car towed ($75)home. Replaced water pump, gasket,and belt for $93 (less $5 core charge). |
| 143000 mi US $17 |
Oil dipstick failed and left debris in oil system. Replaced dipstick and flushed and changed oil. |
| 144000 mi US $47 |
Replaced water pump due to leak not failure. The pump's cost was $27 on amazon plus I purchased an upgraded gasket for $10. I also replaced the accessory drive belt $19(Maintenance). |
| 178900 mi US $56 |
Scan tool showed mass airflow (MAF) sensor read low at high engine loads, possibly high at idle. Had occasional spark knock under part-throttle load. New MAF sensor solved both problems. |
| 190000 mi US $40 |
The MAP (Manifold Absolute Pressure) sensor consistently read a low voltage, setting a diagnostic trouble code and turning on the "checking engine" light. Replacing the MAP sensor resolved the problem. |
| 195000 mi US $1045 |
Water pump was leaking coolant. Replaced water pump, coolant elbows, and coolant. $360 Intake manifold gaskets were leaking coolant. Replaced upper and lower intake manifold gaskets, EGR gasket, fuel injector o rings, thermostat, PCV valve kit, and coolant sensor. $605 Valve cover gaskets were leaking oil. Replaced these gaskets and grommets. $80 |
| 224371 mi US $12 |
Replaced dipstick for engine oil because the seal separated from the dipstick handle. |
| 230000 mi US $151 |
Engine was leaking coolant from the water pump. Replaced the pump. Engine temperature rose quickly at times with the vehicle stopped, but engine never overheated. Replaced radiator, radiator cap and thermostat as a preventive measure. The engine coolant temperature does not seem to rise as quickly as it used to when the car is stopped, so I believe the problem is fixed. |
| 246974 mi US $25 |
"Check gas cap" message appeared because the cap wasn't sealing properly. Replaced the gas cap. |
| 76880 mi C $341 |
repair leaking elbow on water pump |
| 47000 mi US $50 |
Dexcool coolant turned into mud. Suspect possible intake gasket leak. Cleaned out system and monitoring for changes. |
| 171000 mi US $500 |
Fixture in the coolant line broke causing the fluid to flush and the car to overheat. |
| 132000 mi US $100 |
Replaced valve cover gaskets. |
2003 Pontiac Grand Prix 4dr Sedan
200-horsepower 3.8L V6 4-speed automatic FWD
| 97000 mi US $1187 |
Replaced entire exhaust system except for the catalytic converter |
2002 Pontiac Grand Prix 4dr Sedan
supercharged 240hp 3.8L V6 4-speed automatic FWD
| 6000 mi | Replaced leaky intake gasket |
| 90000 mi | Heads leaking oil and antifreeze. |
| 95000 mi | When I first got it heads leaking oil and antifreeze. They just put a band aid on it, I kept smelling antifreeze. Now the heating core is going and while towing it they did not take off the emergency brakes and messed up the rear end. |
| 130820 mi C $800 |
intake manifold gasket leaking antifreeze with potential to foul oil. |
| 131440 mi | piston slapping engine is baked car is being junked |
| 181000 mi | Valve cover oil leak. |
| 199000 mi US $165 |
Exhaust noise. |
| 205000 mi US $400 |
Over heated with coolant in place. |
2002 Pontiac Grand Prix 4dr Sedan
200-horsepower 3.8L V6 4-speed automatic FWD
| 194200 mi | Replaced Tensioner Belt. Cost $376.00 |
| 221340 mi C $350 |
Replace Resonater pipe assembly |
| 212740 mi C $774 |
Replace timming cover gasket and replace thermostat & waterpump |
| 260400 mi C $300 |
Water pump replaced |
| 112500 mi US $900 |
Upper intake manifold leaking |
| 116000 mi US $535 |
Belt Tensior went bad. |
| 64000 mi US $150 |
Replaced upper intake manifold. Manifold made of thin plastic, heats up and eventually cracks around EGR passage. Engine then leaks coolant internally. GM doesn't address this widespread issue, would probably go bankrupt if issued recall. Did work myself. |
| 150000 mi US $3800 |
New, GM re-manufactured Engine Installed |
| 103000 mi US $600 |
Ignition switch was replaced, as it was faulty. A/C and trip computer were not operational due to this. |
| 106000 mi US $1400 |
Cooling system was leaking through water pump needed replacing. |
2002 Pontiac Grand Prix 4dr Sedan
175-horsepower 3.1L V6 4-speed automatic FWD
| 130000 mi US $40 |
P0446 code. Replaced evap purge valve solenoid |
| 151000 mi US $6 |
The bypass hose developed a leak. Replaced the hose. |
| 179000 mi US $3600 |
Blown head gasket and leaking radiator. Leaking oil. Car misfiring. |
2001 Pontiac Grand Prix 4dr Sedan
supercharged 240hp 3.8L V6 4-speed automatic FWD
| 148000 mi US $15 |
Engine light came on and indicated "coolant temp always low." Thermostat seemed to be stuck open. Replaced thermostat and light went out, car operated at normal temperature again. |
| 152700 mi US $400 |
Two idler pullies bad. One siezed causing the turbocharger belt to be shredded, the other was making a ticking noise and on the verge of siezing. |
| 130180 mi C $360 |
Replaced mufflers (2). Replaced rear rocker cover gasket due to excessive oil leak onto exhaust manifold. Real risk of fire. Same problem as recall on frt gasket but no recall on rear gasket? |
| 150660 mi | Fuel pump leaking. |
| 109340 mi C $200 |
Crank position sensor replaced |
| 110600 mi | Valve gasket replaced under recall |
| 176700 mi | Catastrophic engine failure. Car is dead. |
2001 Pontiac Grand Prix 4dr Sedan
200-horsepower 3.8L V6 4-speed automatic FWD
| 157000 mi US $600 |
Replaced ignition switch. Symptoms: No fan, no ac, daytime running lights on and off. |
| 188480 mi C $170 |
Fuel line rusted through and leaking. |
| 186000 mi US $168 |
MAF sensor malfunction affecting proper shifting of the transmission. MAF sensor replaced. |
| 197000 mi US $15 |
Leaking front valve/rocker arm cover. Smoke from oil leaking onto exhaust manifold. Replaced cover gasket. |
| 209200 mi US $650 |
Lower intake manifold leak causing a vacuum leak leading to a lean running condition. This job was done previously at around 80,000 miles. |
| 218700 mi US $450 |
Belt tensioner siezed up causing belt to be destroyed. Alternator, water pump, and power steering pump were no longer operable as they all are belt driven. Tensioner replaced including belt. Issue fixed. |
| 123000 mi | Replaced the Catalytic converter. |
1999 Pontiac Grand Prix
Engine not specified
| 182000 mi US $800 |
Anti-knock sensors replaced. |
| 120000 mi US $500 |
MAS airflow sensor was bad. Engine was hitching/stalling due to fuel flooding. |
| 280240 mi | THE CAR KEPT BACK FIRING SO ENDED UP CHANGING EVERY SENSER IN THE CAR AND STILL WOULDN'T RUN RIGHT SO IT WAS SCRAPRD |
1999 Pontiac Grand Prix 4-door
6-cylinder automatic 2WD
| 192100 mi US $500 |
leaky radiator |
| 195000 mi | engine failure (spin main br'g?). junked it. |
| 129500 mi US $14 |
One Platinum Spark Plug cracked. Plug replaced and power restored. |
See TrueDelta's information for all Sedans
See TrueDelta's information for all Pontiac models.
