I've done it. There's some issues.
The wiper motor is the same. The harness under your dash *should* be the same, you just need to unplug it from your switch and plug it into a new controller box, that in factory trucks ties to the bottom of the column (deck of cards looking thing with alum finx on one end), the column switch plugs into the other end of this. I wired my truck from scratch, so I figured out the wiper circuit from my own bench testing. But if the connector isn't the same, according to the wiring diagrams from the factory, you should be able to cut that connector off and get a donor connector (or new one from
Haywire here) and wire your wires into that. You can splice the wires or use GM Pack-Con II terminals with a Delphi crimper. Part number for terminals for the connector, the controller, and generic wiring can be
found here.. Factory wiring diagrams can be, as always, found on Dremu's site.
http://brochures.slosh.com
Turn signal switch will need updated to the new one, or Painless makes a conversion to use older chassis wiring connector with a newer column connecter. They just lenghtened the connector by a few pins.
Here's the
painless conversion. But IIRC, that conversion is to use older column in newer truck. 30806 is what I was thinking. 30805 will cover you in any event, it comes with both style connectors.
Or check here for all new connectors.
Keep in mind, to use any of these conncetors and terminals, you need the
delphi crimper, a standard crimper doesn't work. That crimper is $100. If your just doing 1 or 2, you could get away with careful plier crimping and solder. But tediously soldering that many in the T/S, wiper, dimmer, that will get old quick, if your not an expeireced solderer, you'll gett too much on there too and they won't fit into the connector body. The delphi crimper bends and folds the wings into and back outboard distributing the wings of the terminals throughout as many strands of wire as possible. If you plier crimp, that's why you need to solder, to spread the electrical load out through the strands of wire. Regular crimper, just doesn't work on these terminals.
Watch what end you get that connects to the steering shaft. There are slight differences depending on year, and style.
See this post detailing some of the issues with that. Post # 7 is probably most relavent.
Dimmer switch, you can use the same connector, it fits, I think you have to break off a small piece of it, but the terminal layout is the same. Or you can buy the exact proper connector from painless or haywire sources listed above.
And finally, a word of advice, if your going to use new or replace the dimmer and wiper switches in the column, and arm/stalk in the column, which I would recomened anyway, use GM parts. The aftermarket ones don't fit as well, the switch has notches for the intermittent positions, where the GM on is infinite (smooth) rotateing, the arm/stalk from the aftermakret didn't line up perfectly with the switch, so the lines were off, no niggie, but annoying when you just bought new. I spent twice and bought GM because it annoyed me so bad. Sold the aftermarket ones back on eBay.