It depends on what part of the harness you need. Pieces and parts i would suggest the dealership for the individual pieces. If you need an entire new harness, i would suggest a company called Painless Wiring. They can provide a universal set you should be able to install without too much trouble. Good luck.
Chevrolet Lumina APV was created in 1989.
I have a "94" apv. The fuel pump is in the fuel tank and is one of the simpler ones to replace,and reasonably cheep at $60.
It's inside the motor housing about where a passengers feet would be. Mounted with 2-3 screws to the firewall with a 5-prong plug inserted going to wiring harness.
There is an electrical problem with the switch or wiring. Have it checked out/
It does not have a carburetor.
The power window fuse for a 1994 Lumina APV is located on the passenger side. It is in the fuse box behind the glove box.
Get a syphon hose
under the engine
in the gas tank
About $900
The 1995 Lumina APV used a Generation II 3.1L V6 (Model LG6). The 1996 APV had a Generation III 3.4L V6 (Model LA1). 1996 was the last model year of the Lumina APV Van. http://en.wikipedia.org/wiki/GM_60-Degree_V6_engine#LG6
Had same problem with My 91 Lumina APV. Changed Starter Relay. Haven't had any problems sence.