Hi everyone! So far, reading through all these is giving me a good idea of what needs to be done, but I thought I'd put in my situation and see if anyone has any other ideas. I have an '05 Yukon, cc worked fine up until just today that I know of, but I haven't used it in about two months since it's been winter. Today was a balmy 35 degrees, roads were good, and I use my cc a Lot. I wouldn't have thought it related until I read through other experiences here, but here's what is going on. I tried to activate cc (mine is a button on the blinker control stick), and nothing. Pressed it again and nothing. Pressed it a third time and saw the dash light for it light up dimly for about a second, and then nothing. This is where it get's into ideas I got from this forum: The other day, my right rear blinker went out, pulled over at a gas station, pulled the capsule off, checked the bulb, but it was fine, then found it was all three right tail lights weren't working. *Important detail?* Took it in to the place I go for things I can't do (winter and no garage means most things right now), and it turned out it was just the connecter for those lights pulled out because a block of ice built up on the wire, they cleaned it for me, hooked it up, and didn't even charge me for it. After it was fixed, I noticed that night that same side backing/perimeter light was out (probably from me messing around with it, no big deal. *Important detail?* So today, before noticing cc didn't work, I went to my local napa where I buy all my parts and got six new bulbs, not LEDs, just bulbs, and replaced all six tail light bulbs, figured I'd just do them all at once. It was on my way to work from there when I noticed cc didn't work. So I'm wondering if maybe that the truck is 12 years old (still runs fantastic!), and a complete fluke, and maybe the brake switch just stopped working, or if the tail light connector or new bulbs could be the culprit. Unfortunately it's supposed to freezing rain all day tomorrow, so I might not get a chance to check anything for a couple days, but I didn't throw away the old brake light bulbs yet, so I'm wondering if maybe that's the culprit. All six lights do work properly now, but I use cc constantly in good weather, and would be devistated if it was gone. Also I don't know if it could be connected in any way, but My ABS light has been on since I got the truck over a year ago, and in the fall one of my calipers seized, and since then after about 2 seconds to several minutes, I get 30 seconds of ringing and a "service brakes soon" message, but I've had it checked and it looks like it's just the sensor in the bearing hub which I'm doing once spring hits (meant to before winter, but then winter happened faster than I could get around to it). I'm sorry if this is more information, I don't usually post to things like this, I just want to get any info out that could help. Also, sorry for the massive wall of text. Thank any and all of you who are able to help me in advance, and if you need more details, please ask. I will check back and when I find a resolution, I will report back as to what it finally was.
. All the people in this thread were happy because it worked with them immediately 
. I don't know why it didn't work for me although I'm pretty sure there are no codes present. The part I installed is brand new. The ACD number is D1539J.
