What did you do to your NNBS GMT900 Tahoe/Yukon Today?

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BackPagePhil
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So I've noticed this problem 2 times in the past few months, but chalked it up to possibly my fault. This time however, it for sure wasn't. My Tahoe keeps putting itself into 4wheel high. The knob shows it is in 2wd, but the orange light is on 4WH. I noticed it tonight coming around a turn and heard a noise. Then made another slow turn and heard and felt it. Then turned into my driveway and felt it again, looked down and there it was on 4wh. I stopped to take a pic, but by the time I got my phone on and on camera, it switched back.

Has anyone ever experienced this? It's hard to take it to a mechanic when it's extremely random or won't stay in that position.
 

Doubeleive

Wes
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So I've noticed this problem 2 times in the past few months, but chalked it up to possibly my fault. This time however, it for sure wasn't. My Tahoe keeps putting itself into 4wheel high. The knob shows it is in 2wd, but the orange light is on 4WH. I noticed it tonight coming around a turn and heard a noise. Then made another slow turn and heard and felt it. Then turned into my driveway and felt it again, looked down and there it was on 4wh. I stopped to take a pic, but by the time I got my phone on and on camera, it switched back.

Has anyone ever experienced this? It's hard to take it to a mechanic when it's extremely random or won't stay in that position.
might be a faulty switch, I think the nbs have a similar issue sometimes and it's been the switch
 

swathdiver

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My Tahoe keeps putting itself into 4wheel high. The knob shows it is in 2wd, but the orange light is on 4WH. I noticed it tonight coming around a turn and heard a noise. Then made another slow turn and heard and felt it.

might be a faulty switch, I think the nbs have a similar issue sometimes and it's been the switch

Probably the switch Phil like Wes says if the DIC did not give a warning and if no internal codes are present.
 

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BackPagePhil
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When you say the switch, you mean the knob to turn it into auto,4wh, or 4wl? Or something else. Just take it to my mechanic and have him replace it? Obviously I don't want it to go into 4wd while I'm doing 50-60 mph.....
 
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