I'm fairly new to this so I'm still learning but how hard is it to replace the wiring harness? In theory this might help me achieve better reliability.

 

the ENTIRE wiring haress? or just part of it that needs repair?

the entire thing wouldnt be very fun...a lot of work

but, i rewired me entire wiring harness from the firewall forward...still a lot of work, but not terribly bad.

-brian

 

it depends on your idea of "hard". All you do is unplug everything, take it out, snake the new one into place, and plug everything back in. Piece of cake.

The difficulty comes in being familiar enough with it to lay it out properly as you're installing it. Getting all the wires to the proper places while the motor is in the car and fully assembled can be frustrating too. The first time I took my motor out, I labeled every plug. I quickly realized during reassembly that as long as you lay it out properly, everything plugs in just fine and you don't have any problems figuring out where stuff goes. GM was smart enough not to use two identical plugs near each other. In fact... the only duplicates that I can even think of are the IAC plug and the transmission plug, but the tranny plug is white and on the opposite end of the harness.

 

There are two things that the factory never intended to be removed from the car, quarter panels and the main wiring harness. Sure, both can be replaced, but they were intended to stay where they are. Replacing the main harness, the one in the car, would be an absolute nightmare.

If you have to ask, then you are not capable of doing it. Simple as that. Besides, harnesses are A LOT more expensive than you would think.

 

OK... Why the conflicting replies? Fisher says too hard, absolute nightmare. Others say unplug everything lay it out correctly and its not that hard.. Explain?

 

 

Fair enough.. Thanks..

 

OK I have done this B4 the reason for conflicting replys is that there are really 2 harnesses one from the firewall out under the hood which isn't all that bad to replace the other is on the inside of the care which is a nightmare to do, you literally have to strip the car to change this out seats, carpet, headliner, center console, the entire dash board.... It is a nightmare I've done it b4 and it was a pain in the ***, I am very good at fixing and working with electrical wiring I've been messing with electrical sence I was 9 and I consider the inside to be a pain in the ***. Luckly though GM designs its inside harness (usally) in several parts the interconnect so if you have something wrong usally you can just replace a section.
~Aaron