okay i purchased a wiring harness for my 89 sse with the premium sound system in it! I went threw all the hassle of removing the old deck and ashtray! and when i went to install the deck/harness the harness did not match the pins! it looked like a totally different style of setup mine was small pins this was like big slider! this is not my first install either this is car number 15 for me I don't drive stock radio'*!lol..wondering if the upgreded radio has a different harness adapter then the base model versions the harness says it fits 1977-1991 Pontiac Bonneville'*! but some how I think it was either miss packaged or there'* a different plug for the bose system! I went back to the store (canadian tire) and read the vehicle discreption book and matched the number again and compared it to another they were the same and i did have the rigght plug and I know this radio is the stock bose premium sound system! i looked it up! Unfortunatly i searched this site and did not find the answer to my question? anyonme who can be of assistance it would be gretly appreciated!

The wire harness should look something like this:



This receives all three of the colored connectors (white, blue & black, I believe). This is a Metra kit 70-1677. There'* a couple other manufacturers of wire harnesses but should still look similar. You're gonna need an antenna adaptor too. Metra 40-GM10 or equivilent



BTW, Bose systems didn't appear in the Bonneville until 97.

yes that is the connector i have i have a nothe rold deck from one of my blazer or grand am or some delco deck and it has has the same setup on it the colors are (blac,whit,blue) three evenly sized slider plug! this deck that is in the bonny has the e.q built in and the gain button below and has in signle stand plug (constant) and the rest are on another plug which has two colors on it a blue and red two tone single plug and it'* all factory wiring and deck!?.. this plug that i have is used for alot of g.m withthe old dual **** setup and A few with the digital side to side seeks.. but the deck i have looks more like 92+ seup thatis in my other cars but it'* not the same the read out is in the corner only and has like i think 6 presetys all stacked together in a box bellow it and has a scan button and it is a tape deck non the less with all the buttons bellow that for operating the deck! and has a 5-6 way built in adjustable e.q? and this plus in the back of the deck in the car runs small pins horizontaly across the back of it! as where plug i have is used for the vertical style that says delco onit! the one i has reads as a delco LOC if that means anyhting? has the antitheft lock on it too!

UPDATE! after finding my owners manaul i found an exact pic of it on page 169..lol it is listed as the ETR am stereo/Fm stereo with cassette player and steering wheel controls!...guess everyone doesn't have those!lol i do!lol I have al the other deck this book shows aswell except the stock c.d i can tell you for sure that the rest of them will all use that plug posted that i have but this deck will not, not even close to the same shape or size! oh yah my bad it wasn't bose! it was Performance sound!...cheap knock off i guess!

Can you get us a pic?

FOUND IT! it'* a 1985+ UP gm plug! here'* a link for all who have the same issue!
http://www.crutchfield.com/*-S9nqVDZ...00&I=120701858

why crutchfield doesn't list the one i have already is beyond me cuz it fits the stock models?...

I have a pic now. but i don't know how to show you it!lol..i'm not up on all this internet picture stuff!

OK. Your homework assignment is to go out and get the right harness so you can have tunes.

To post pics, sign up for an online image hosting site. Many of us use www.photobucket.com but there are many others. Once you have created an account, upload the pic(*) to the site from your PC. Then link the pics to the forum using the [img] tags. For instance, my sig pic is entered as:

hope it works!...thanks

Yep. Works just fine. Looks like mine