2000 Grandprix Supercharger Problems

[1970 GS]

Hello, I'm wondering if someone can help me with some questions regarding my 2000, 3.8 Pontiac (Supercharged) Grandprix? It has about 95,000 miles and I believe the supercharger is going out. Just started making a knocking (what sounds like a bearing) noise from the center of the supercharger and I've checked the fluid, it was a little low. It also started loosing power if I step into it and Service Engine Soon Light is on. I’ve rest the ECU but the light is still on. It started running a little rough so I’ve just completed a tune-up to it. So my questions are:
1) If the supercharger is going out, can that effect the running/idling performance?
2) If I need to replace the supercharger, is there a reputable place I can purchase a new or rebuilt?
3) What’s a good price for a new or rebuilt supercharger?
4) Tips or instructions on how to R&R the unit?
Thank you.

[John Kanaly]

Originally Posted by 1970 GS

Hello, I'm wondering if someone can help me with some questions regarding my 2000, 3.8 Pontiac (Supercharged) Grandprix? It has about 95,000 miles and I believe the supercharger is going out. Just started making a knocking (what sounds like a bearing) noise from the center of the supercharger and I've checked the fluid, it was a little low. It also started loosing power if I step into it and Service Engine Soon Light is on. I’ve rest the ECU but the light is still on. It started running a little rough so I’ve just completed a tune-up to it. So my questions are:
1) If the supercharger is going out, can that effect the running/idling performance?
2) If I need to replace the supercharger, is there a reputable place I can purchase a new or rebuilt?
3) What’s a good price for a new or rebuilt supercharger?
4) Tips or instructions on how to R&R the unit?
Thank you.

What was the code that you had before resetting the ECU normaly called a PCM in a GP?
The S/C will not effect the running/idling of the eng except the power will be greatly reduced. You can drive with the S/C belt disconnected. The normal types of failure for the S/C is coupler or berrings and at the milage of your car the coupler is provably making some sounds. The normal fill at GM is low and is brought up to fill at the first check by a mechanic. All the fluid is used for is keeping the gears/berrings from over heating and that takes very little fluid so a little low is not a problem. To test the S/C see if the sound goes away or lessens if you increase the eng speed (RPM) if it goes away it is the coupler if the sound gets louder it is provably a berring. you can get parts from www.ZZPerformance.com or a low milage replacment from www.moradpartscompany.com R&R is not too bad :-) just the snout can be removed by taking the belt and alternator off and removing the bolts holding the snout on there is one in the center under the snout that is hard to see ;-) for the compleat S/C drain the radiator and remove the fuel ralls then remove the bolts holding the S/C to the (LIM) lower intake manafold. water is used to heat the (TB) throttle body and passes thru the LIM into the TB. I usually take the thermostat housing off and use a vaccum cleaner to lower the water level in the LIM when taking a S/C off a eng. It's not a hard job if you work on any cars. Good luck.