What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Sam Harris]

Nope. All I have is a continuity tester, but I didn't know what the pinouts were, so I just said screw it and bolted them on. Once or twice it seemed like the driver side was gonna fold. Hitting the switch to close them, ds mirror went down, but that was it, nothing more.

Interesting! So it’s moving the mirrors down, when you push it inboard..? That’s step one, before they fold in..! Sounds like the fold motor doesn’t have power or ground.

 

[Sam Harris]

Wish I knew. Both tho.....

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Turn signals look good. [emoji106] Man, really need to replace my stock tails.

 

[ScottyBoy]

Tony, I used to have the pinouts saved on my old computer before it crashed. I know for a fact that the fold wires are a gray wire and a brown wire. I can't remember which one is which. But when voltage is applied to those two wires, the mirrors will either fold or unfold. Reverse the polarity on those wires and the mirror will move the opposite direction (fold or unfold).

 

[Rocket Man]

Humph f me it was a hard day. Doing this shit in my driveway is torture. Especially for an old man. Gettin too old for this.

 

[Tonyrodz]

Turn signals look good. [emoji106] Man, really need to replace my stock tails.

Thx. I hated my stock tails. Was my 1st mod.

Tony, I used to have the pinouts saved on my old computer before it crashed. I know for a fact that the fold wires are a gray wire and a brown wire. I can't remember which one is which. But when voltage is applied to those two wires, the mirrors will either fold or unfold. Reverse the polarity on those wires and the mirror will move the opposite direction (fold or unfold).

Thx Scotty. Can't wait to give that a shot. Are those wires in the black connector? Power to one and ground to the other? Good to see you back buddy

 

[Tonyrodz]

Humph f me it was a hard day. Doing this shit in my driveway is torture. Especially for an old man. Gettin too old for this.

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What'd you find Mark?

 

[ArcticYukon]

Interesting! So it’s moving the mirrors down, when you push it inboard..? That’s step one, before they fold in..! Sounds like the fold motor doesn’t have power or ground.

That's what I'm thinkin.

 

[Rocket Man]

What'd you find Mark?

Nothing obvious. Transfer case seems ok, torque converter looks ok, trans looks ok with no oil leaking from the front seal. But if I put the gear selector in N the tail shaft only turns in one direction. When it happened, at first the truck felt like the brakes were on then it killed the engine and the starter wouldn’t turn it over. After it sat for about an hour I was able to start the engine and I was able to move forward a few feet but not reverse. And when the tow truck came, I tried pushing it forward and back in N with the engine running and not running. I could only move it forward, it wouldn’t go back at all.( I warned the driver but he loaded it on a flatbed and there’s a whole other story in my build thread about getting it off that truck.) So something was locked up and it looks like it was the trans. I’ll get a warranty authorization and ship it and the converter back to see what they find.

 

[Tonyrodz]

Nothing obvious. Transfer case seems ok, torque converter looks ok, trans looks ok with no oil leaking from the front seal. But if I put the gear selector in N the tail shaft only turns in one direction. When it happened, at first the truck felt like the brakes were on then it killed the engine and the starter wouldn’t turn it over. After it sat for about an hour I was able to start the engine and I was able to move forward a few feet but not reverse. And when the tow truck came, I tried pushing it forward and back in N with the engine running and not running. I could only move it forward, it wouldn’t go back at all.( I warned the driver but he loaded it on a flatbed and there’s a whole other story in my build thread about getting it off that truck.) So something was locked up and it looks like it was the trans. I’ll get a warranty authorization and ship it and the converter back to see what they find.

Hopefully they won't bust your chops and replace it.

 

[ArcticYukon]

Nothing obvious. Transfer case seems ok, torque converter looks ok, trans looks ok with no oil leaking from the front seal. But if I put the gear selector in N the tail shaft only turns in one direction. When it happened, at first the truck felt like the brakes were on then it killed the engine and the starter wouldn’t turn it over. After it sat for about an hour I was able to start the engine and I was able to move forward a few feet but not reverse. And when the tow truck came, I tried pushing it forward and back in N with the engine running and not running. I could only move it forward, it wouldn’t go back at all.( I warned the driver but he loaded it on a flatbed and there’s a whole other story in my build thread about getting it off that truck.) So something was locked up and it looks like it was the trans. I’ll get a warranty authorization and ship it and the converter back to see what they find.

Oh wow.... does it have a trans brake?