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I have an 05 with 27k miles on it and mine wiggles from side to side. I bought the car 3 months ago and it has wiggled from the day I bought it.
 

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Formerly 06 STS-V, now 13 XTS
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If you are talking about the bottom seat cushion seeming to wiggle back and forth on the frame (sometimes emitting a squeaking or farting sound), then there is a TSB on this. VERY common problem.

The fix involves using some split rubber tubing to shim up the seat. I had it done many months ago, and have had no issues since.

Do a forum search on "squeaky seat" or something similar. Lots of discussion on it already. Then take it to the dealer. They should fix it for you as you should still be under warranty.
 

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Cadillac STS-V Black/Black
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Wow I noticed this in my car but just though it was me. It does not bother me enough to bring it in for service though.
 

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While we are on the subject of seats.. I was in the back seat of a friends 05 STS, i notice the back of the drives seat had actually come apart. It was very noticeable on his car. So, i looked at my drives seat and it appear to be seperating at the same place as his just not as pronounced.. have others noticed this? is there a TSB for this?
 

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2010 CTS4 & 2005 STS4
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Has anyone tried fixing this themselves? My 05 is out of warranty and thinking of doing it myself. Tips welcome.
Thanks............. Joe
 

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2010 CTS4 & 2005 STS4
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I dove into this and fixed the seat myself. Pull off the two sided trim around front of seat. Disconnect the seat controls, or remove the entire module. You will find two 10mm nuts holding the front of the seat down on the rails. Remove these and lift the seat up, you will not be able to remove it completely so just work around it. You will see 4 square holes in the top of the rails, this is where the seat fits into. You may even see wear marks at these holes, ergo the movement and noise. Put small pieces of split vaccum hose with glue inside, on each side of these holes, 8, let the glue dry a little and then place the seat back into these holes. It will be a challenge to get the seat back in place, but it's just rubber hose and it will give. Use some downward force when resetting the studs in the front, replace the 10mm nuts and you are done. Just replace the trim panel. Most of these instructions will become clear once you are actually seeing the mechanics of it.
PS the only reason you need the glue is to keep those pieces of hose in place until after insertion. Joe P
 

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Document ID# 1863385
2006 Cadillac STS


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Subject: Front Seat Cushion Moves Sideways, Pops and Creaks When Turning (Install Rubber Hose (Vacuum Line) On Adjuster Rail) #06-08-50-010 - (09/21/2006)



Models: 2005-2007 Cadillac STS




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Condition
Some customers may comment that the driver or passenger seat cushion moves sideways slightly while going around corners. They may also hear a pop or creak noise when this happens.

Cause
This condition may be caused by too much clearance between the seat cushion platform anchors and the seat adjuster rail.

Correction
Install four pieces of rubber hose (vacuum line) on the seat adjuster track following the procedure below:

Move the seat back and up in order to gain access.
Remove the power seat switch bezel by pulling the bezel away from the seat. This will disengage the retaining clips.
Remove the seat trim plate.
Disconnect the connector from the power seat switch.
Remove the two 10 mm nuts that retain the seat cushion to the adjuster rail.
Lift the front of the seat cushion up and forward in order to unfasten the rear hooks that retain the seat cushion to the adjuster rail.
Cut four pieces of 7/64 in rubber hose (vacuum line).



Split the rubber hose (vacuum line) down the side . Apply weatherstrip adhesive to the inside of the hose (vacuum line) and install to the seat adjuster rail.
Install the seat cushion to the adjuster rail.
Install the two 10 mm nuts.
Tighten
Tighten the seat cushion nuts to 9 N·m (80 lb in).

Install the seat trim plate.
Connect the electrical connector to the power seat switch.
Install the power seat switch bezel.
Re-zero the inflatable restraint passenger presence system whenever the seat cushion or any components are removed. Refer to Control Module References.
Warranty Information
For vehicle repaired under warranty, use;

Labor Operation
Description
Labor Time

C9711*
Left Seat Cushion, Install Rubber Hose Adjuster Rail - R&R
0.3 hr

C9712*
Right Seat Cushion, Install Rubber Hose Adjuster Rail - R&R
0.3 hr

*This is a unique labor operation for bulletin use only. This 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.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© Copyright General Motors Corporation. All Rights Reserved.


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Document ID# 1863385
2006 Cadillac STS
Winder if anyone has ever taken any photos of doing this? Would be handy!
 

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2006 STS V8 1SF RWD
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I plan on undertaking this myself sometime this summer, these creaky seats have annoyed the crap out of me since I bought this car...If I do it I will take some pics as I go.
 

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2006 STS4 V8 1SG & 2007 STS V8 1SE
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It was a long time ago, but I do remember seeing some images.

With roughly 8,000 threads, there's an awful lot of stuff just here on the STS forum. Think hor much there is on the whole site.
 

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Ok so I decided to tackle this job. All I had to do was tighten up the two 10mm nuts. They were surprisingly pretty loose. Seat is nice and tight now.
 
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