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

[89Suburban]

without the parking stop being there not sure, people have had problem with the rear glass not opening and it is usually because of the rear wiper not in the correct position, happened to me on my nbs these are the same design mechanically.

I am going to investigate the wiring from the push button and the latch solenoid and see if they run into the wiper plug and if I can make any sense out of it or bypass it.

But I will plug the motor in first and test everything to confirm our theories and report back. Thanks for the help and brainstorming.

 

[89Suburban]

 

[Tonyrodz]

View attachment 255455

Were you able to figure it out?

 

[89Suburban]

Were you able to figure it out?

Working on it right now brah. Here is the wiring plugs. The blue and the pink with black stripe both go to the wiper motor. The red with white stripe on the wiper plug is power black is ground. If I run a jumper from the red/white to the blue the glass solenoid pops open. Really need a wire diagram.

 

[89Suburban]

Pin
Wire Color
Circuit No.
Function

1
L-BU
6795
Liftglass/Trunk Motor Release Control 2

2
BK
1450
Ground

3
BK
1450
Ground

4
PK/BK
1303
Liftgate Ajar Switch Signal (E52 Except E61)

PU
2279
Liftglass Ajar Switch Signal (E61)

 

[89Suburban]

Ok when I run this jumper from tan to blue on the wiper plug it works. The button and the key fob open the glass. Not sure what to do with the pink/black wire for the glass ajar signal.

 

[89Suburban]

That jumper wire was the ticket, everything works right, rear access warning works, all good!

 

[Tonyrodz]

Ok when I run this jumper from tan to blue on the wiper plug it works. The button and the key fob open the glass. Not sure what to do with the pink/black wire for the glass ajar signal.


View attachment 255458

Do you get the window ajar message? If so maybe try putting a jumper from the pink/blk to ground--maybe that'll kill the signal?

 

[89Suburban]

Do you get the window ajar message? If so maybe try putting a jumper from the pink/blk to ground--maybe that'll kill the signal?

Nah I think it’s all good man. Warning only comes on when it should. Tailgate open or glass open. No warning when all is closed. I think I got it.

 

[George B]

Quick question:
How long ‘yall going between oil changes on Mobil-1?

I am at 4,000 and down 1/2 quart. Oil still looks golden color.