I don't have the diagram but I would not suggest cutting into the existing factory wiring for GM and Chevy vehicles. If you do, you will lose all of your chimes. This includes the seat belt warning, headlight reminder, door ajar, and low fuel warning. My suggestion is to buy an aftermarket interface harness with a chime. The correct model depends on what options your vehicle has such as Bose Premium Sound and OnStar.
Scosche and Crutchfield sell the harnesses and will make sure you get the right one, but Ebay is the cheapest way to go.
what is the wiring diagram for an 1988 Chevy celebrity stero
You can find a stereo wiring diagram for your 1990 Chevy Cheyenne 2500 at most Chevrolet dealerships. The stereo wiring diagram will be in Chevrolet service manuals at your local library.
You can find a wiring diagram for your 1994 Chevrolet Astro Van stereo at most Chevrolet dealerships. The stereo wiring diagram can also be found at your local library.
The 2005 Chevrolet trailblazer stereo wiring diagram can be obtained from most Chevrolet dealerships. The stereo wiring diagram can also be found at most auto-parts stores.
try www.haynes.com
wiring diagram for mass airflow sensor
www.the12volt.com
www.installdr.comthey have wiring harness diagrams for all makes
crutchfield
A Chevy S 10 wiring diagram, with color codes, can be obtained from most Chevrolet dealerships. The wiring diagram can also be purchased from most auto-parts stores.
http://www.the12volt.com/installbay/forum_posts.asp~TID~64251
Go to this site they almost every auto factory wiring diagram for free. www.the12volt.com