wiring harness

  1. Chillracket733

    93 pcm and wiring harness swap

    Hey this is my first time posting but I need some help! So I recently bought a 1993 single cab that 4.3 v6 Manual well it was originally Manual. The person I bought it from kept all the manual parts even the clutch pedal. But I bought the truck because I got a 94 c1500 350 sbc that I’m 6.0...
  2. wolfwaggy

    98 silverado harness swap with 98 suburban ...now no brake light and no relay in 98 suburban harness..???

    My 98 Silverado. 5.7 Z71 4wheel auto . my harness melted on the egr pipe. I replaced the harness from a 98 Tahoe. I didnt notice that the Tahoe fuse block didnt have a brake light relay untill after I installed it. I have turn and flasher and park lights...no brake light but the cab brake light...
    • wolfwaggy
    • Thread
    • wiring diagram wiring harness wiring help wiring issues
    • Replies: 0
    • Forum: Electronics
  3. Mister1500

    Complete body Harness

    Hello GMT400 friends. Its been a minute since I have posted. I have a situation where I am intending on buying a "donor" Burb to completely gut mine and swapped over a complete engine and body harness and interiors. My 99 C1500 is from the south and has absolutely no rust. However much of the...
  4. A

    98 5.7 vortec swap into 1996 k1500

    I have a 1996 Chevy k1500 that had a 4.3 vortec v6 with an nv3500 behind it I pulled the v6 out and put a 5.7 vortec v8 with the wiring harness and ecm from the 1998 Chevy pickup it was pulled out of. I got everything hooked up and ran wires to the starter with a button start it there’s no codes...
  5. O

    95 gmc sierra K1500 to 96 gmc sierra K1500 full body swap

    First time i’ve posted in this forum but figured this would be the best place to find the info i’m looking for so i’ve got a 1995 gmc sierra K1500 manual, and i’ve recently purchased a 1996 gmc sierra K1500 auto with no motor and I'm looking to put the full body (front clip, cab, and box) of...
  6. L

    Looking for wiring diagrams and ground points for 89 c1500

    Looking for diagrams and grounding points. I have no power to my yellow accessory wire to my radio and multiple electronics in my truck are not getting power. There seems to be a completely dead circuit. The yellow wire that is supposed to get a constant voltage to radio with key out of the...
    • luvmychevy22
    • Thread
    • 12v ground problems grounding spots wiring diagram wiring harness wiring help wiring issues yellow wire
    • Replies: 1
    • Forum: Wiring Diagrams
  7. W

    Cruise control wiring

    I am trying to add cruise control from a 94 suburban to a 92 k2500. The harness I have has the cruise module connector, the convenience center connector, cruise switch control connector, and a PCM connector. It does not have a connector to go from the brake switch. I tried to have just the...
  8. N

    Chewed Wiring

    I just took a peak at my headlights and tail lights in my 92 suburban, and have found that the wiring for every single light has been chewed through, about a foot into the wiring from the lights. I'd like to replace the wiring harnesses for all the lights, and have easily found multiple...
  9. L

    Harness Swap Gone Wrong

    Long Story short, I wrecked my truck almost a year ago and have been restoring it on my free time since. I bought a parts truck from a guy for 1k and began tearing it down and moving parts over. Today, after for the most part buttoning up the new wiring and putting in a new battery i turned the...
  10. T

    1998 k1500 5.7 with 4L60E wiring/shift issues

    hey guys ! First post here I have a 1998 gmc sierra 5.7L 4L60E 4speed NP243C electric transfer case 4wd obviously. 50k on trans 140k on motor. It’s lifted 10 inches on 35s I just wanna give a quick motor and mods list before I go down my rabbit hole. Ok first problem — last week my straps...
  11. 1996greanbean

    Ext Cab to Crew Conversion Question

    Well it seems odd I’ve been going to this website for the last 5 years for advice and never once registered so I’m brand new here. I’m sure one of you knows the answer to my probable obvious question but I have to ask because I haven’t seen any other discussions about it. Little background. I...
  12. hilly101111111

    brake light issues

    I have a 1990 GMC K2500 350/Turbo400 trans 4x4 8' bed. Every time I hit my brake pedal when the headlights and tail lights are on, my drivers side tail lights go out and my backup light lights up. Also when the lights are on and I use my driver side turn signal the tail lights and the backup...
    • hilly101111111
    • Thread
    • back up lights brake lights ground wire grounds help taillight taillights turn signals wiring wiring harness
    • Replies: 8
    • Forum: Electronics
  13. J

    Interior light subharness

    I just swapped my dash in my 94k1500 W/T edition. Only had driver side door switch and single dome light. Got a dash off of an earlier edition Chevy but has no cracks. It also came with interior foot lights, glove box light, and ash tray light. It supposedly plugs into the convenience center but...
  14. 2000obs

    2000 k2500 5.7 vortec/5 speed engine harness

    I have a 2000 gmc sierra sl k2500 reg. cab long bed with the 5.7 vortec and nv4500. I was wondering where I could find a engine harness cause mines is all cut up and sensors are missing. It surprisingly runs and drives but it runs like **** cause its missing all those wires and sensors. Would...
    • 2000obs
    • Thread
    • 4x4 5.7l vortec nv4500 wiring harness
    • Replies: 1
    • Forum: Electronics
  15. 94ChevyZ71

    Engine Harness

    My dad just recently bought this 88 k1500 single cab and it needs some work. The guy who had it before really screwed the wiring up. It’s a 350 tbi and the main loom coming out of the firewall on the driver side is cut in half. Also the plug for the loom where it attaches to the firewall is...
  16. Chevyboi93

    Using factory gauges for LS swap

    Hello, to all my fellow Chevy/OBS lovers out there,I’m planning to swap my 5.7 for a LQ9 in the near future and after a lot of research I feel like I’m going to handle it pretty well BUT I am slumped on one thing and that’s getting my factory gauges to work at least for now until I drop the...
  17. Wontonfun

    4L80e trans leaking from "electrical connector"

    95 C3500 chassis cab w/ 7.4L and 4L80e having trouble solving transmission leak. Dealership says it's coming from an electrical connector that ties into my wiring harness between my TISS and TOSS. They said it would probably be an oring but they would have to pull the entire transmission to...
  18. McSweeney

    Positive terminal ground straps

    Hey so i noticed that my ground strap that connects to the frame on my 97 broke and im not sure where it goes to or even where to buy a new one. So what im seeing is that there is a ground strap that goes from the frame to the firewall, which looks easy enough to replace. But the other one...
  19. B

    Wiring harness

    I'm staring disassembly on my 91 for a full frame off and notice several chewed wired under the hood. Anyone have a good source for a wiring harness for these trucks? I did a google search with dismal results.
  20. I

    TBI injector harness grommet.

    I'm having trouble sourcing this grommet as mine has become brittle. Does anyone know if any companies reproduce them? Also, does anyone know what kind of terminals are used inside the injector pigtail? I imagine I'm going to have the cut the wires if I replace it. So I'm either going to put a 4...
  21. B

    New from Cullowhee,NC

    Found these forums when I blew head gaskets on my 95 k2500 last year. Officially making myself a member today because I’m completely stumped about wiring. upgrades: Jegs power performance long block. Jegs dual-plane intake manifold. Fi-Tech 450hp injected carburetor with upgraded fuel pump...
  22. LoCascio_Inc

    Help Needed - Rear Speed Sensor Wiring Leads to Nowhere. w/ PICS

    1998 K2500 ECSB has had a code C0236 (missing rear speed sensor) since purchased. I disassembled the wiring harness to look for a short and revealed that the wires from the rear speed sensor on the transfer case output terminated at another connector with a female to female adapter about 18"...
    • LoCascio_Inc
    • Thread
    • abs c0236 harness missing rear speed sensor mystery rear speed sensor wiring wiring harness
    • Replies: 6
    • Forum: Transfer Cases
  23. LoCascio_Inc

    Help Needed - Rear Speed Sensor Wiring Leads to Nowhere. w/ PICS

    1998 K2500 ECSB has had a code C0236 (missing rear speed sensor) since purchased. I disassembled the wiring harness to look for a short and revealed that the wires from the rear speed sensor on the transfer case output terminated at another connector with a female to female adapter about 18"...
    • LoCascio_Inc
    • Thread
    • abs c0236 missing rear speed sensor mystery rear speed sensor sensor wiring wiring harness
    • Replies: 1
    • Forum: Electronics

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