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  1. 1994 3500 a/c wiring diagram

    Chevy C/K Truck Forum
    I would like the wiring diagram for a 1994 GMC 3500 a/c system. And the location diagram to go with it. Thanks In case there is a tech very familiar with the '94 and earlier system, my problem is: - The a/c works great, but cuts out after an hour and a half or two hours. The system resets...
  2. speaker wiring issue

    Chevy C/K Truck Forum
    hello, i'm new here so just hoping for some assistance. having problem with my radio and speaker wiring. all of my speakers work except the drivers front door speaker. if i test the wires with a test light i get power through all wires including the negative speaker wires for all speaker...
  3. Window wiring conversion

    Chevy C/K Truck Forum
    I have a 1997 k1500 z71. I recently bought a 1991 k 1500 parts truck. My question is since the 91 has the older style switches and wiring harness. Can I find anything in the aftermarket to plug straight in to my existing truck harness to convert it to the older door harness. My problem is that I...
  4. 1994 C1500 Firewall Wiring

    Chevy C/K Truck Forum
    Hi all, I’m currently installing a CB radio in my 1994 C1500, and I need to wire the coax antenna cables through the firewall. Are there any preexisting holes or grommets that I could piggyback off of, or would I need to drill a hole? I want to do as little collateral damage as possible...