about to hit 100,000 soon can't wait tell it says. 99,999 miles
it's sitting at 98800 right now going to get the oil changed on Monday as it's due
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
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it's sitting at 98800 right now going to get the oil changed on Monday as it's due
Kee Fuller
Full Access Member
Bought new tires about a month ago. Tried to get the hazard certificates from discount tire, but couldn't because they didnt sell the particular brand i bought. A few weeks later my tpms went out. Bout 4 oems on ebay. Discount quote me over the phone 40 bucks a tire to install with road force balance. I finally get in and one of the salesman offers me the certificates. I paid 40 bucks total for the install of the tpms and 100 bucks total for the certificates and it comes with unlimited free road force balances. Paid less than what i expected to pay and got more than expected
no you have a lazy or stuck actuator, now you just need to figure out which one, mine was obvious because the passenger side was blowing warm air when I had it on 60degI was just out in the garage hooking up the Tech2 to reset the trans fluid monitor. I didn't have the engine running, just the key on engine off. The headlights, radio, and HVAC all came on and I turned off the headlights while I stood next to it with the door open and the Tech2 sitting on the seat.
I decided to check for DTCs while I had it hooked up and got 2 for the HVAC system as pictured below. Are these because I had the vehicle on with the engine off and the HVAC still turned on?
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according to the service manual it is either the re-circulation actuator or auxiliary passenger? side, looks like the same code I was getting before I changed my passenger side actuator.
there are a couple ways to test it but the manual says to check voltage, I would check both the drivers side and passenger side on full cold with a thermometer, and then switch them to hot and check them again, if the passenger side is a different temp (not as cold or not as hot) then you know, I don't know how you would check re-circulation except visually I think it is on the left side of the airbox under the dash maybe use a flashlight and watch it while commanding and see if it articulates all the way back and forth.
I don't know if you can use the tech2 to command left or right on the front individually I only messed with the rear which is only 2 actuators hot/cold & up/down. to get to the passenger side front actuator you have to do what I did in my youtube video, pull the dash trim off and pull the passenger airbag.
I don't know if you can use the tech2 to command left or right on the front individually I only messed with the rear which is only 2 actuators hot/cold & up/down. to get to the passenger side front actuator you have to do what I did in my youtube video, pull the dash trim off and pull the passenger airbag.
swathdiver
Full Access Member
I was just out in the garage hooking up the Tech2 to reset the trans fluid monitor. I didn't have the engine running, just the key on engine off. The headlights, radio, and HVAC all came on and I turned off the headlights while I stood next to it with the door open and the Tech2 sitting on the seat.
I decided to check for DTCs while I had it hooked up and got 2 for the HVAC system as pictured below. Are these because I had the vehicle on with the engine off and the HVAC still turned on?
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Your Auxiliary Mode Actuator probably needs replacing. Go into the Body Control Module, HVAC and then Door Positions and see what the commanded and actual states are. If they are off by more than 4 or 5 counts its going to throw a code. The B3782 code makes me think that the thing is wandering, the commanded might be a 32 counts but the actual is all over the place. That's is what my main Mode Door Actuator is doing right now with it's corresponding code like yours. If it doesn't rain tomorrow and my back holds out, it'll get changed.
Good luck trying to order the right one ahead of time. I thought I knew them but was proven wrong! I THINK it is 15-72972/89018375. Already proven that 15-72971/89018365 controls the driver and passenger air temperatures and that 15-73952/89018374 is the main Mode Door up front, it's sitting on my desk.
swathdiver
Full Access Member
While on the topic of Tech-2 and AC, do you guys show a reading for Rear Cabin Air Temperature? Mine is blank and wondering if the Aspirator in the headliner is to blame back there. Front gives a reading.
wjburken
Supporting Member
Surprised that you’re still not changing you’re own oil after the stories you’ve told about the incompetence of the folks that you’ve been having do it. Besides, didn’t you buy like 5 gallons of Mobil1 last year when they had all the rebates or do you bring your own oil in for them to use?
I’d make sure to double check how tight the filter is.
Never mind, it looks like you have an actuator that’s stuck.
Burb!!
Full Access Member
Used her to tow for the first time ever. Brought home another toy. 
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gooffeyguy
Tom
Got my Diodes in the mail today, Thanks!!
What gauge wire should I use for this mod?
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