r/PontiacGrandPrix

2004 Grand Prix GTP

Swapped to old lower control arm style and installed the ZZP solid sway bar. The factory down pipe is now resting on the sway bar.

Has anyone else dealt with this after going with their sway bar?

Will replacing the down pipe give me some relief? Or will I need to repair/adjust/replace some of the exhaust hangers down the line? Not really looking to do a full exhaust kit on this car but will if I have to.

Any suggestions are greatly appreciated. Can share pictures on request.

Hello Everyone,

I just bought a 2005 GP as my commuter for work. I put a radio in, and since then have had some interesting issues.

The radio was professionally wired by Crutchfield, installed by me. I am handy, but not a mechanic by any stretch of the imagination.

Since putting the radio in, my DIC no longer works. I accidentally dropped the panel it sits in when installing the radio, leading me to initially think I broke it- but given what I’m about to share I think they’re related. I have a new DIC ordered that should be here tomorrow to test either way.

The related issue I’m having is super goofy issues with the gauges now. My tach, gas, and temp will all die, but not my speedometer. When this happens the TC light also pops on. The car runs completely fine and usually if I restart the car it goes away, but not all the time. At this point this is happening probably 30% of starts?

I no longer think I broke my DIC. I think there’s something electrical causing all this mess. Any suggestions or additional questions please let me know. Willing to answer any questions and troubleshoot just about anything. In the week I owned the car prior to the radio install, I had no dash issues at all. I paid for the wiring to be done by crutchfield as this was a huge concern with this being a Chevy and how fun radios can be in those.

Thanks for reading my novel. Appreciate any advice.