PACROEM-GM21A System Interface Kit to Replace Factory Radio and Integrate Factory Amplifiers for Select 99-02 full size GM/Chevrolet SUVs , BLACK

After some YouTube research, I settled on this for my 2000 Escalade to maintain my factory Bose amp. This was an extremely easy install. Just pair the colors. On the connector to the stereo side, there are 4 “hi level +” wires that you’ll just double up with the “low level +” wires. There’s plenty of space for the interface in the dash. Worth the $34!

I bought this to put a Pioneer Head unit into my 95 Camaro with the Bose factory stereo. My Bose died, but I wanted to keep the existing speakers and wiring.When I purchased this unit, I made a mistake, and ordered the ROEM-GM21A when I should have ordered the ROEM-GM21. The Only difference being the harness that connects the interface to the factory wiring.PAC were not very helpful, but online I was able to find a document PDF that showed how to convert the GM21A to a GM21 Harness. Basically it involves a paperclip and moving 6 of the pins to different locations in the plug.Works like a charm!

works great

Didnt work didnt use

I purchased the roem-gm21a but received roem-gm21 instead which doesn't work for my vehicle. The whole reason I ordered roem-gm21a is because thats the specific one I needed

Absolutely complete waste of money

Does exactly as it says brought the right sound back to my system.

works as described