| 1 | 0 | 3 | 4 | 3 | 4 |
2004 Pontiac Grand Prix repairs by problem area
Engine (44%)
Transmission and Drivetrain (3%)
Brakes and Traction Control (15%)
Suspension and Steering (10%)
Electrical and Air Conditioning (14%)
Paint, Rust, Leaks, Rattles, and Trim (3%)
Other (9%)
Chart based on 86 repairs.
2004 Pontiac Grand Prix engine repair cost distribution
$2500+ (3%)
$1000 - $2499 (6%)
$500 - $999 (13%)
$100 - $499 (32%)
< $100 (45%)
Chart based on 31 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
2004 Pontiac Grand Prix 4dr Sedan
supercharged 260hp 3.8L V6 4-speed shiftable automatic FWD
| 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! |
| 110000 mi | Valve cover gasket oil leak. Discovered at trade in. Did not repair. |
| 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 |
| 213000 mi US $300 |
Serpentine belt broke. |
2004 Pontiac Grand Prix 4dr Sedan
200-horsepower 3.8L V6 4-speed automatic FWD
| 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. |
| 139500 mi | Motor mount was worn. |
| 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). |
| 188000 mi US $145 |
Had to replace the lower intake manifold gaskets. Common problem |
| 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. |
| 132000 mi US $100 |
Replaced valve cover gaskets. |
| 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. |
| 47000 mi US $50 |
Dexcool coolant turned into mud. Suspect possible intake gasket leak. Cleaned out system and monitoring for changes. |
| 76880 mi C $341 |
repair leaking elbow on water pump |
| 171000 mi US $500 |
Fixture in the coolant line broke causing the fluid to flush and the car to overheat. |
| 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). |
See TrueDelta's information for all Sedans
See TrueDelta's information for all Pontiac models.
