So being 22 years old, a lot of the wiring and connections on my car are getting worse and instead of trying to track down and fix all the little issues, I figure that it would be easier to just buy a new harness to update the wiring. Does anyone sell or make new engine wiring harnesses for our cars?

 

You might try painless? I am not sure if they do or not.

http://www.painlessperformance.com/

If they do offer a harness you'll definitely pay for it. You'd probably be better off just taking the wire lum off and examining/fixing the wires yourself. There are places that offer GM pigtails if the connectors are getting bad.
https://www.acdelcotechconnect.com/p...tails-catalog/
Brush up on your soldering skillz and do it yourself.

 

I would buy new pigtails or connectors, new harness is way more than its worth

 

Whats the best place to buy new connectors? Any good vendor suggestions?

 

takes some searching to find what you want but Mouser has anything you want including all the ECU connectors for way cheaper than anyone else. Delcity has a few of the connectors but not all.

Most of the connectors are Packard Metripack 150 series, few things like the MAP sensor are Packard Weatherpack. You can get some special picks and tools to help de pin the old connectors. I need to get some myself but haven't had time to

 

BP Automotive. I know he doesn't list the LT1 harness on his website but he has made one for a customer of ours in the past. We have used multiple harness from BP and they have all been top notch work.