I need to know how to install an aftermarket HU in a 1989 Chevrolet Suburban 1500. I bought all the necessary stuff (harness, adaptor, antenna cable) but the harness does not match up, its too big and its labeled 86' and up GM. He said there is an external amplifier that comes stock and that what i need to wire it up to. i personally think he is blowing smoke bcuz when i took out the old one there was just a regular harness. Please help i have to have this done by friday. any help greatly appreciated. thx

 

Look for a matching harness on ebay.

 

this is the exact one i bought from the guy... i dont get it... btw it was livewire car audio off florida by the intl flea market who i bought it from.

 

AC delco units sometimes DO have external headunits - if it does you will need a separate harness. Have you looked for the amp?

 

no where is it usually located.

 

could be under the passenger seat, under the rear seats, or in front of the spare tire in back. if the harness doesn't fit you definitely need to get the right one though. take it back there and make him give you the right one.

 

no there is a amp under the dash in those trucks -
you shoud be able to unplug the amp pull the wires thru the radio opening and use the harness you have - i will install it for $25 tonight!