Which is a better way to go when keeping the integrity of the interior and gauges? AAW looks much more complete with options to expand....also less expensive. Purchasing OEM syle wiring is much more expensive. Is there a benefit over the other?
I'm confused... Factory wiring from GM is no longer available.
The 3 manufacturers of aftermarket wiring that come immediately to mind are AAW, M&H, and Painless. All three have many choices of wiring.
I'm most familiar with AAW.
Option 1 is exact replacement, can't tell them from stock. Harnesses are complete with all new factory style connectors, factory style fusebox, everything as original as it can be. M&H also sells this style harness, Painless does not.
Option 2 is called "Classic Update" (from AAW) This style adds additional circuits and wires for commonly installed "modernizations." Things like electronic ignitions, electric fans, stuff like that. I believe an AAW Classic Update harness still has all the factory connectors preinstalled in the right places, not sure what type of fusebox it uses. M&H has a similar product.
Painless is best known for thier 18 circuit universal street rod harness. This one uses a new style fusebox, and all the ends are unterminated for custom routing and so you can install whatever type of connectors you like.
Painless HAS been adding products, and coming out with harnesses targeted at specific cars that are not so "universal do it yourself." They also have a selection of standalone EFI harnesses for retrofitting modern engines into older cars.
While in the past, we have not recommended painless for people here who wanted to replace thier factory harness, I do think they deserve another look. They have a lot of new products that I at least know little about.