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mp3z24 · 01-16-2004, 08:09 AM

alright... i have a 2000 cavalier z24 with the class 2 data system.

first off, i'd like to find the people at gm who came up with this idea and beat them with a pipe.

now down to business...

the radio in *my* class 2 data system is a sub-computer... basically it does its own thing on the side of the car's main computer system. so when i took mine out all i lost was the speed controlled volume, the radio power off delay, and the idiot chime. the reason the idoit chime is lost is that the radio plays the chime through the front left speaker. since the radio is run via the class 2 data stream, there is no ignition wire for turning the radio on.

so, there are a couple options... you can use a basic gm compatable wiring harness to hook up your new stereo. you will lose the all those features i listed above, but it is by far the cheapest.

the other option that you can do is what i did. several companies have available a specialized harness that lets you piggyback the new radio into your existing system. basically it is a T-harness that still lets the original radio recieve the class 2 data. some of them also come with a small speaker that you can hook up to the original radio to maintain the idiot chime. also, i put the original radio in the glove compartment, and it fit fine.

so, there are your options...NO lights will come on, your airbags WONT deploy, your car WONT stop running, or any of the other horror stories. the only way your airbags will go off is if you start screwing with the wiring while you are in the dash... dont cut or tap anything if you dont know what it is for

let us know what kind of car you have also...

~Mike

01-16-2004, 08:09 AM	#5
mp3z24 Registered User Join Date: Apr 2001 Location: Chicago Suburbs Vehicle: 2000 Cavalier Z24 Posts: 1,282 My Photos: ()	alright... i have a 2000 cavalier z24 with the class 2 data system. first off, i'd like to find the people at gm who came up with this idea and beat them with a pipe. now down to business... the radio in my class 2 data system is a sub-computer... basically it does its own thing on the side of the car's main computer system. so when i took mine out all i lost was the speed controlled volume, the radio power off delay, and the idiot chime. the reason the idoit chime is lost is that the radio plays the chime through the front left speaker. since the radio is run via the class 2 data stream, there is no ignition wire for turning the radio on. so, there are a couple options... you can use a basic gm compatable wiring harness to hook up your new stereo. you will lose the all those features i listed above, but it is by far the cheapest. the other option that you can do is what i did. several companies have available a specialized harness that lets you piggyback the new radio into your existing system. basically it is a T-harness that still lets the original radio recieve the class 2 data. some of them also come with a small speaker that you can hook up to the original radio to maintain the idiot chime. also, i put the original radio in the glove compartment, and it fit fine. so, there are your options...NO lights will come on, your airbags WONT deploy, your car WONT stop running, or any of the other horror stories. the only way your airbags will go off is if you start screwing with the wiring while you are in the dash... dont cut or tap anything if you dont know what it is for let us know what kind of car you have also... ~Mike __________________ Single Member of the "1000 Post and No MP3 Car" Club PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE 2000 Cavalier Z24 [###-------] Only 30% Done ... Still