our78pacer

2005 Tahoe Z71 - 100k - 5.3
Happy New Year! Have an issue with unintended motion of the driver's seat. Has happened a couple times in the past, but most recently twice in the past few days.

Came back to car after whatever and find that seat has moved to it's FAR forward position. Seat was unoccupied.

Some time ago, had the seat start this forward trek while I was in the seat. Had a bit of a panic moment as I had to get it stopped and back to my normal position.

Love the Tahoe, but this has me concerned. Any others experiencing similar issue?

Thanks - GaryC - Central Indiana

tech2

Does it have the memory seat option?

our78pacer

Tech2, yes, it has memory seats.

Drove to a breakfast about 1/2 hr away this morning. No problem going other than saw a low of 5 degrees. When I came back out from breakfast, seat had moved to the far forward position. I readjusted the seat, did not use memory, to my liking.

Thanks
GaryC

tech2

there is a bulletin out to address this. belive it involves checking the switch? If that is ok, the memory seat module is reprogrammed.

can you live with it? Otherwise it will cost probably an hour labour to fix it?

our78pacer

Tech 2, thanks for the info. Is there a way to get to the tech bulletin? I'd really like to get the issue corrected.

our78pacer

I believe that GM bulletin 050850012 may cover this problem. Is there a way for me to see what's in this bulletin? NHTSA 10017764

Thanks

in2pro

Here is a bulletin I found but it appears to apply to a mechanical movment

Service Information 2005 Chevrolet Tahoe - 2WD | Avalanche, Escalade, Suburban, Tahoe, Yukon (VIN C/K) Service Manual | Document ID: 1849537
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#05-08-50-012A: Unwanted/Loose Seat Movement (Apply Adhesive and Install New Bolts in Seat Mounting Rails) - (Jul 24, 2006)


Subject: Unwanted/Loose Seat Movement (Apply Adhesive and Install New Bolts in Seat Mounting Rails)


Models: 2002-2006 Cadillac Escalade, Escalade EXT

2003-2006 Cadillac ESV

1999-2007 Chevrolet Silverado Pickup Models (Classic)

2000-2006 Chevrolet Suburban, Tahoe

2002-2006 Chevrolet Avalanche

1999-2007 GMC Sierra Pickup Models (Classic)

2000-2006 GMC Yukon, Yukon XL

2003-2006 HUMMER H2

with Power Driver Front Seat Power Adjuster (RPO AG1) and/or Passenger Seat Power Adjuster (RPO AG2)




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This bulletin is being revised to add model years and additional Warranty Information. Please discard Corporate Bulletin Number 05-08-50-012 (Section 08 -- Body and Accessories).


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Condition
Some customers may comment on unwanted seat movement in the front power bucket seat (driver or passenger) during fast acceleration or hard braking. A metal to metal clicking noise is often heard at seat "stops."

Cause
The threads of the two zinc nut retainers (one on each side of the seat adjuster) may creep over time, causing a loss of self-rolling screw clamp load and ultimately causes relative rail and vehicle seat motion.

Correction
Apply adhesive and install new bolts in seat mounting rails using the following procedure.

Remove the front seat and invert onto a flat surface covered with a clean, non-scratch material (soft cloth or similar). Refer to the applicable Seats sub-section in SI. Adjust so that the seat mounting rails are at 45 degrees.
Remove the upper M8 mounting bolt from one rail and discard. Leave the other bolt intact as this will hold the track in place while working. Wipe the bolt hole area with a clean rag.
Important: Only use the adhesive provided in the repair kit. Do not substitute with other adhesives.

Take one of the adhesive sachets and carefully cut the flag tip off the notched end spout in line with the notch.



While holding the sachet vertical, slowly dribble the adhesive into the edge of the bolt hole as shown, ensuring that the adhesive flows into the joint between the seat rail and the zinc block. DO NOT pour the adhesive down the center of the hole. The object is to let the adhesive "wick" between the zinc block and the seat rail in order to bond the two pieces together.



Important: If the bolt thread strips or the proper torque cannot be achieved, then the entire seat adjuster mechanism must be replaced.

Replace the previous bolt with a new M8 bolt (1) (included) and install using a "click torque wrench" preset to 9 N·m (79 lb in).
Remove the second M8 mounting bolt from the rail and discard.
Repeat steps 2 through 5 for the second bolt.
Repeat steps 2 through 6 for the opposite mounting rail.
Before installing the seat into the vehicle, verify that the seat will function correctly and does not make any unusual noises during forward and rearward travel motion.
Install the seat. Refer to the applicable Seats sub-section of SI.
While sitting in the seat, verify seat function and listen for any unusual noises.
Parts Information



Part Number
Description
Qty

89045784
Adhesive Kit, D/Seat Adj Bolt
1 kit per seat


Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

C9740*
Replace seat rail bolts and apply adhesive
0.5 hr

Add
to service additional seat
0.4 hr


*This labor operation number is for bulletin use only. The number will not be published in the Labor Time Guide.



GM bulletins are intended for use by professional technicians, NOT a ""do-it-yourselfer"". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

our78pacer

Thanks for chasing this bulletin down. It isn't applicable to our situation. This is not just the seat being loose or whatever, this is movement of the seat via the electrics. Get our of the car with everything in it's normal position and come back to find the seat has trucked forward to it's most forward position. This is a voice changing forward position. As I said, it is usually found when you return to the car, but believe I have had one instance of it starting forward while in the car. Quickly hit the controls on side of the seat and it back tracked.

Guess we'll keep digging.

Thanks
Gary

our78pacer

Had hoped to be able to find something ahead of just taking it into the dealer for $$$$$ repairs.

Gary

in2pro

You might want to try removing the electrical connector from the seat as a temporary fix until you can get a more convenient time to do the repair...