can i change my stereo system in my 89 chevy gmc sierra?

yes you can . go to walmart and they will have a mounting kit to put your sterio where the tape deck is at. the main factory unit is in under the dash you have to unplug it from the top of the unit and plug it in to your color coded wiring harness (that is also sold at walmart) wire your new steiro to the harness and pop it in the dash. hope this helps some.
 


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