Originally Posted by 99 sse
so i just need to get a adapter for the deck and throw it all in ? no amp bypass ?
no bypassing needed.. i can take pictures of mine and prove that i didnt bypass it to run an after market stereo..
im not an audio freak but im not a noob either..
one thing i always wondered why would the speakers pop when the amp sits between the HU and speakers? if something should pop/fry after installing the aftermarket HU it will be the amp.. because the output signal from the amp to the speakers is not changing regardless of what HU you're connect right? (im asking the experts here not being sarcastic)
anyways back on topic..
For 00+ bonnevilles with amplified systems you need the Metra GMOS-09
or the Pac C2R-GM32R
to get it going with stock Bose or Monsoon system (my Monsoon system needed the harness *both PAC & METRA* slightly modified to work because stupid pac and metra think Bose and Monsoon have same wiring schematics, well they dont..) and saying this from experience on my 2005 Bonneville GXP with Monsoon.. took me over a month to get it working thanks to Darcy'* (ddalder) help on P.B.C
For older gen Bonnevilles 99 and before with amplified sound systems you will need a Pac ROEM-GM21C
im not sure if Metra makes any for older bonnevilles with amplified systems. (this is not from experience, this is from online searching and common sense, i installed a HU in my 97 Bonneville but i didnt know **** about cars 6 years ago and never knew if it had an amp or not.. all i used was a cheap $8.00 harness from canadian tire or walmart and it worked like a charm)
another thing you should do is go thru the audio section here on this forum and other forums and see who did install a HU on older bonnevilles with an amplified system and see how/what they needed to do it. most users have their mod lists in their sigs.. that could help too..