Forum: Electrical

98 XJ with an 05 LM7 5.3L from a Sierra 1500, 35x12.5" shoes, 4.56 gears, 4l65e1. Swap went smooth (finished around 8-10 months ago). I recently...

I have a 98 OBS that I'm swapping a 5.3 into. I'm using the 2004 5.3 pcm and wire harness to run motor and trans 4l60e. I'm gonna keep my stock PCM...

06 Avalanche 5.3 4wd 85k miles, here's my long ass story. this is a 3 or 4 month troubleshooting headache for me so ill try to describe this as its...

I'm having an electrical problem which I am almost positive is a ground issue. If I am not mistaken, 4 grounds attach to the block - (1) large gauge...

I've been having electrical issues so I've been looking at wiring diagrams a lot lately. During my studies of these diagrams, I noticed that some...

Can I put a 2000 4.8 harness on an 04 6.0 without any issues other than throttle body and computer? Everything else should plug in right?

I am using an automatic truck harness in my manual truck and the neutral safety switch has been giving me problems and now I cant start my truck with...

Nevermind

Ive got a 1998 chevy half ton 5.0, the starter keep engaging while the engine is running, i changed the starter and it still does it

This is my first LS swap and what would you know I am getting a run for my money already. I had been wanting to swap a 6.0 into my 99 k2500 5.7 obs...

Hey guys, I just want to clarify that my 3 bar map sensor works. I plugged it into my truck that has a 2.5 bar map sensor (cobalt ss) and it read...

I swapped in a LS engine in 97 suburban Used thinned out factory harness with psi harness. My voltage gauge, Oil pressure, tac and speedometer...

00' 4.3 to 03' 5.3. All plugs (C2, C100, C152) are pinned to schematic. Key in on position, I/P blank except MIL light. Key in on position with scan...

As most of you kn ow by now i have a complete pullout with ECm and all wiring from a 01 yukon that is drive by wire. I am looking to convert to drive...

So were all familiar with case grounded and isolated ground O2 sensors on the Gen3 stuff. It seems that any LS1B PCM will work with either style,...

I received the ISS sensor harness from Nelson, and I am having a bit of trouble inserting the pins into the ECM. Is there a specific procedure for...

Hello, I have a 2002 Sierra 4X4 5.3.---- tuned by Allen. Question is- does and at what temperature does the PCM red pin #33 activate? Also Blue...

I've got a wierd problem with my wiper motor. Wipers work but they dont turn off when I shut them off, eventually they will turn off but usually in...

Hi. I am working on the wiring for the 5.3 I am installing into my 97 Tahoe. I am trying to route and hide everything I can. Is there any reason...