Time for an update here I guess as I've spent some more money
Following my previous post, the rear HVAC continued to act strange, even after I had replaced the blend door actuator (which I did confirm was broken). Took the thing apart again and found that the blend door itself had actually broken off of it's swivel point. GM only sells the entire HVAC box, not the individual door, so I took a trip to my friendly (not really!) scrapyard and pulled a blend door out of the only Yukon they had, which was lying on it side (that was fun). Replacing mine involved removing the rear HVAC assembly, taking it apart and then reassembling. Took a solid hour of work, tedious but not too difficult. Here's what the box looks like (not my photo):
Then the factory HID/Xenon headlights started acting up. I've whined enough here about it enough, but the short version is that the truck burned through 2 OE ballasts (@$500 a shot) and one aftermarket ballast in about a 2 month span. With the crap weather and not having the electrical expertise to diagnose I brought to a shop....more screwing around....I ended up suggesting that we setup a relay harness system direct to the battery to power up the ballasts, then I sourced the parts, and had the shop install, even though at that point I could've done it in 20 minutes in my driveway
That was finished yesterday and so far they've been working. *fingers crossed* they continue to work.
Lastly; I was getting an intermittent "service ride control" message on the dash. I diagnosed as a leaky left rear air shock for the automatic rear leveling system. I Ordered a set of replacement shocks (Monroe OE Spectrums) an installed them. Huge difference in the way the truck feels, plus no more service message, and the onboard air compressor runs a lot less. The shocks were money well spent IMO.
It didn't really need one, but while it was at the shop for the headlights I had an alignment done.
Here's hoping that it goes for awhile now without anymore hassles.
Pics from late summer, just because an update feels wrong without pics....