Need Your Help!!!

Does any have or know where i can get a (radio)wiring diagram for 91 Sierra?

I have the factory manuals for the 90. I doubt they changed between 90 and 91.

Is there something specific you need? I could look it up tonight and post the information.

//2000CAYukon

Its the wiring that goes to the radio and cigarette lighter cause neither of them work.


thanks alot
:bigthumb:

Its the wiring that goes to the radio and cigarette lighter cause neither of them work.


thanks alot
:bigthumb:

I will take a look at the diagram when I get home. I am on the west coast so I won't be able to post until 9 or 10 PM PST.

//2000CAYukon

The radio (am/fm/cass/eq) gets power from 3 sources.

On the receiver (under the dash), one side has 15 pins in a row, the other has 20 (2 rows of 10). On the side with 20, pin 6 is parking lights which gets power from the 5 amp fuse "panel lps" and is grey. Pin 9 is Ignition power and the power comes from the 10 amp "radio" fuse and is yellow. Pin 10 is Memory (Batt) and it gets power from the 20 amp "Courtesy" fuse and is orange.

By the way, these pin descriptions are engraved on the receiver.

The "cigar lighter" (this is what they call it) gets it power from the 20 amp "park lp" fuse and is orange.

Hope this helps.

//2000CAYukon