What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
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went to load some things in the back, and the dam hatch wouldn't open, or rather it wouldn't lift up like it normally would so I thought great.....
first thought was the battery could be to low since I have been having questionable battery stuff going on, reads 12.33 volts, ok so I thought well maybe if I start it up if the voltage is too low then it should work with the alternator going, I start it up, look up to push the button and god dammit one of the kids must have switched it to off lol mission abort!
first thought was the battery could be to low since I have been having questionable battery stuff going on, reads 12.33 volts, ok so I thought well maybe if I start it up if the voltage is too low then it should work with the alternator going, I start it up, look up to push the button and god dammit one of the kids must have switched it to off lol mission abort!
lol, I was about to go bust out the tech2 grumble, grumbleKarma is a ***** road rager!!!
Can’t tell you how many times I’ve had to talk my wife off the ledge because if this. She hit it accidentally when trying to open the garage.
Shoulda done it, betcha could have found SOMETHING you could fu*k up.lol, I was about to go bust out the tech2 grumble, grumble
lol maybe but I kinda learned my lesson on that one alreadyShoulda done it, betcha could have found SOMETHING you could fu*k up.
George B
¯\_(ツ)_/¯
Shoulda done it, betcha could have found SOMETHING you could fu*k up.
I am surprised I could wash mine without Fu*kn' something up!
Yeah me too. Turned into one helluva lesson now that I look back on it. It started with me deciding to update the firmware in my HVAC control head for no good reason, I just wanted the latest version. My heater and ac were working fine. During this process, which you actually helped me with since it was the first time I programmed a module, as you might remember I bricked the module. So I ended up buying a used one from LKQ. It seemed to work fine and I didn’t want to chance bricking it so I never programmed it. That was in February so I never checked the AC. Fast forward to a couple weeks ago, after I had swapped in an entire dash from a Tahoe along with an entire new interior into my Silverado, and I try to use the AC for the first time and it’s blowing hot air and the Tech2 throws a code saying the evaporator temp sensor is open, and from what I can find out about this sensor I needed to pull the dash out to access the evaporator and remove the case...so I pull the entire dash and sub assembly but can’t find this damn sensor. And lo and behold somewhere in my internet searches I come across a TSB that says...get this...if you replace an HVAC control head in these rigs, you need to program it to your vehicle or it will throw a code for this sensor which ISNT EVEN USED IN THIS MODEL YEAR! So holy shit I hook everything back up (with the dash still out), program the module, and the AC works and the code is gone. In case you missed it, here’s what it looked like for awhile.
I never found a tsb for mine I just came to the conclusion that since the "rear temperature sensor" on a "open circuit" didn't even exist then it must be the firmware, the closest I got was a wiring diagram for "said" sensor from "just answer" that I paid for and oddly enough the diagram was on some amazon server, no mention of it in the service manual AT ALL this was when I discovered there are like 10 of these little small temp sensors all over the truck and I thought one of them must be bad or disconnected or something, glad I didn't tear the whole truck apart but I sure thought about it, I might have if I hadn't got the wiring diagram showing me where it should have been all the way in the back by the rear hatch on the drivers side so I took down the headliner and looked all over for even a wiring harness nope nada nothing there.
I can’t even find that TSB now, in fact I think it’s listed under “preliminary information” and never made it to TSB status. I have looked through alldatadiy and all my internet history on my iPad and desktop and I can’t find it. But if I hadn’t found it, and the fact that it listed the exact symptoms and the DTC number ( which isn’t even listed on my alldatadiy list of DTC’s, it’s not listed because the truck doesn’t have that sensor) I might still have no AC. I just got lucky because I probably wouldn’t have programmed the module because of what happened the first time I tried. I really got lucky.
iamdub
Full Access Member
Clown? Looks like a game of Whack-A-Mole to me!
George B
¯\_(ツ)_/¯
New right side cv going in.
iamdub
Full Access Member
Likely from the gasket collapsing from age. They'll dry up, shrink and harden. That's why they start leaking when they're old. It's also why these engines have specific torque specs- it's to crush the gasket just enough to make a good seal and provide a measured amount of tension on the bolts but not deform the gasket.
Looks like I missed all kinds of PA excitement. Wrong gasket, reused original (and collapsed) gasket, had resulting oil leakage, shotgunned it with all new parts...
Is that Dorman VLOM the upgraded design?
iamdub
Full Access Member
lol, I was about to go bust out the tech2 grumble, grumble
That still would've been MUCH better than ripping out the dash to chase a ghost.
Drok
Full Access Member
ill probably be in that area myself soon. Im hearing some not so nice noises when i hit 50-55 mph and a nice hummmm when i hit the brakes at that speed too. Ughhhh. Lol
George B
¯\_(ツ)_/¯
Lol
No sh*t
