Some time back I was freaking out over the price of a replacement turn-signal lever for our '96 Trans Sport and somebody here steered me to GMPartsDirect. I got what I believe is the correct part there for about half what the dealer wanted, it arrived sealed in an original GM parts bag, etc.
So this weekend I finally installed it. The lever itself just sticks into an open hole in the left side of the steering column, but you have to disassemble the column to reach the socket to plug in the little pigtail lead for the cruise control wiring harness. Joy.
So out comes the airbag, steering wheel, sensor coil, lock plate, turn-signal switch, ignition switch, various screws, etc., pull the shift bowl, try not to lose the dimmer-switch slider, fiddle with the wiring connector, get the new lever plugged in, get all the parts inside the shift bowl realigned, screw it all together again, and an hour or two later, it'* all done. Whew.
Okay, so there was one teensy problem with the cruise control switch... um, how can I describe this... oh, let'* just say...
IT DOESN'T [very naughty word here] WORK.
It'* like I never plugged in the connector, only I did, and it seemed to fit perfectly, but neither the Set/Resume/Accel slider nor the pushbutton on the end are doing anything. (The cruise system had been working fine with the old broken lever; we'd managed to break it off near the base but it was still dangling by its wire so I could still use the cruise system.)
The only difference between the old one and the new one was that the old one has a blue plug on the end; the new one has a black plug (same plug, different color). I didn't think too much about that at the time because (1) it plugged in perfectly anyway, and (2) the socket that it plugs into in the minivan is also black. I didn't compare wiring colors at the time to make sure the same wires go to the same pins; I guess I'll have to.
But am I missing something else here? I got what the listings said was the correct part number, and on-line there was no footnote about needing to check whether the plug color was blue or black; that'* the only noticeable difference between the two. They're otherwise absolutely identical and genuine GM parts. Other than having to take the whole blasted thing apart again and start testing wires (I'm sure I'll find the problem eventually; I just have better things to do with my time), I figured I'd see if anyone at a GM dealership can find a footnote or something that I'm missing here.