I have read that there may be an issue with the seat motor control unit. Check with your dealer on a recall or tech bulletin. It may need to be reprogrammed to work properly.
Although this is for a 2004 it may carry over to the 2009 model:
Document ID# 1694588
2004 Chevrolet Tahoe - 4WD
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Subject: Memory Seat May Not Return to Requested Position (Reprogram Driver Seat Module) #04-08-50-016C - (08/12/2005)
Models: 2003-2005 Cadillac Escalade, Escalade ESV, Escalade EXT
2003-2005 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003-2005 GMC Sierra, Yukon, Yukon XL, Yukon Denali
All with Seat FRT, Individual (Non BKT) (RPO AN3)
2003-2005 HUMMER H2 with Seat, Front Bucket Deluxe (RPO AR9)
This bulletin is being revised to update the correction information. Please discard Corporate Bulletin Number 04-08-50-016B (Section 08 -- Body and Accessories).
Condition:
Some customers may comment that with repeated cycling of the memory seat between the 'exit' and one of the 'presets', the position of the seat may "creep" forward or rearward out of expected adjustment.
Cause:
There is a coding deficiency in the software for the memory seat module.
Correction:
Technicians are to reprogram the driver seat module with an updated software calibration. The previous bulletin stated to use a service calibration that was released with TIS satellite data update version 4.5. Feedback has proved that calibration to be ineffective in eliminating the memory seat creep condition. An updated service calibration was released with TIS satellite data update version 6.5 available June 13, 2005. This new calibration has additional memory seat creep protection. As always, make sure your Tech 2® is updated with the latest software version.
Important: After programming is complete, move the seat all the way rearward and down, then bump the seat slightly forward and up. This position will be just off the end of travel hard stops. Reset both memory seat exit positions at this position. Having the seat set at just off the hard stops will aid in reducing the creep condition.
Warranty Information
Labor Operation
Description
Labor Time
N9524*
Driver Seat Module - Reprogram
0.4 hr
*This is a unique labor operation number for use only with this bulletin. This number will not be published in the Labor Time Guide.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# 1694588
2004 Chevrolet Tahoe
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