Does anyone know the oem part number for 2004-2005 GXP Bonneville sub frame or cradle bushings..?? Or where i can find any type of replacement ?? Also is there any poly replacements, can I use bushings from a previous year fwd GM vehicle of some sort ..Interchangeable by chance??

I will probably go with madtuner.com just due to the fact what else do i have to loose ..?? Hp is Hp and i will take all i can get, so Im going to get it mail order tuned eventually !! Also the MAF sensors the 2004-2005 GXP bonneville's have is the same as the 4.8-6.0 trucks along with ZO6 corvette ...

I figured as i have done a large amount of research and madtuner.com is about all i came up with as well ...

To quickly tune, and tone a box or change its internal volume(size) you can add whats called poly-fill commonly known as pillow stuffing its a cotton like material and it can make big and noticeable differences !
The structure/construction of the box is as important as well along with making sure ...

In my 2005 GXP - I have 2 15 inch JL AUDIO w3 v2 DVC subs in a sealed box powered by a Memphis Audio 1000.1 RMS I must say that its pretty obnoxious and maybe even a little overkill lol !

Does anyone know of any well known reputable tuners, Or anything that will allow me to tune/re-program my 2005 Bonneville GXP OBDII PCM/Computer ..??

Reason being I did a few mods along with deleted/removed my CAT, and well... I have hit a small bump in the road naturally lol ! I'm mainly just ...