The acceleration pedal position sensor or APPS determines the angle or position of the throttle or accelerator pedal enabling the throttle body to open depending how far the pedal is pressed which results into acceleration or deceleration of the vehicle. The acceleration pedal position sensor can easily be located under the dashboard of the driver and can easily be replaced by removing a few clips and bolts. Compatible with the following vehicles: 2007-2011 Escalade 2007-2011 Escalade ESV 2007-2011 Escalade EXT 2007-2011 Avalanche 2007-2011 Silverado 1500 2007-2011 Silverado 2500 HD 2007-2011 Silverado 3500 HD 2007-2011 Suburban 1500 2007-2011 Suburban 2500 2007-2011 Tahoe 2007-2011 Sierra 1500 2007-2011 Sierra 2500 HD 2007-2011 Sierra 3500 HD 2007-2011 Yukon 2007-2011 Yukon XL 1500 2007-2011 Yukon XL 2500 2008-2009 Hummer H2 Replaces part numbers: 25832864, 699-105, 699105 This is a compatible replacement part manufactured by AA Ignition. This throttle position sensor is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this throttle position sensor fits.