Finally getting around to replacing the blower motor wiring. Just one question, though.

It says to use these wiring sleeves, but requires "the approved crimping tool," GM part number 12085115. Is there any common equivalent?

thats a standard connector, just alot of people use the "non insulated" part of the normal crimper and you want to use the insulated part

The only crimper I own is for Ethernet… I don't think that will work. Any other suggestions?

http://www.homedepot.com/webapp/wcs/...cStoreNum=1273

this is what i use, if you dont intend on using it very much you can probably find a cheaper one like this

Now I know what to look for. Thanks!

In case I can't find a crimper (doubtful), would those twist-on caps used for house wiring work for automotive wires? The package says they're good up to 700 V, but doesn't say anything about amperage.

you dont want to use those on anything that vibrates. so no. in fact i would be soldering and heat shrink the heater wires or any high current application on the car. if you solder it you dont have to worry about vibration, corrosion, heat, etc...

Me, I'd solder.. That way it'* a solid wire connection and your high power blower voltage isn't only flowing where the outter piece is crimped to the wire.

solder is definitely the way to go. probably cheaper too if you have an iron already. just make sure you get some good shrink tubing.

I'm terrible at soldering, but that does seem like the best way if I can't use these fancy wire joiners. Will regular solder work, or do I need a certain kind?

Wal-mart, in the auto section, carries the solder you need, along with the heat shrink tube, which is about 80% cheaper than Radio Shack. Practice a bit on some old wire, you will find it is not that hard. Since you are not doing work on a printed circuit board, a high power solder gun is the easiest to work with.