Thread: helllo new proud owne of an 07 GXP

Originally Posted by Fivefingerdeathpunch

The HDM Module in the fuse box could be the headlight issue, fairly common thing if you search on it.

The shake could be motor mounts or axles. The LS4 eats motor mounts, they are poor design and do not last a super long time. Being that it's an 11 year old car, they are likely to be original depending on mines. I'd look into those first because if the axle geometry is wrong it can cause vibrations.

Thanks,
I was thinking motor mounts myself. I will check that tomorrow,
The headlights appears to be a more complicated issue. The Bright indicator is on but actually the only lights working are dim. I just got back from a drive and found that the high beam indicator goes off when the left signal is on, So with some fiddling I found that I can get it to go to dim by placing a slight amount of pressure on the lever. So it looks like the switch may be the issue. The driving lights only work when the bright indicator is out. I think the previous owner may have Jerry rigged the headlights to work dim only no matter where the lever is..
I will get a Headlight Module just to be safe before I start tracking down gremlins.

I have always been a Pontiac fan. My 1st car was a 69 Tempest that I wish I still had. From there I have owned 7 Fiero's the 06 Grand Prix that we owned less than a month before it was totaled, and my favorite car was an 84 Grand Prix. I had that car from 1986 till 2004 again I wish I had kept it as well. I sacrificed it to get the C5 Vette.

I must say I am surprised at the power and handling from a FWD 4 door sedan the GXP is.

I still think GM should have killed Buick and kept Pontiac.