Your search for "2009 GMC Yukon XL 1500 SLT" revealed the following:

Fox Mono Tube Rear Shock 980-24-660
FOX 2.0 Performance Series Shock Rear 0-1IN Lift - Trucks - 980-24-660 FOX 2.0 Performance Series Shock Rear 0-1IN Lift - Trucks - 980-24-660
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Fox Coilover Shock 985-02-018
Fox 2.0 Performance Series Coilover IFP Shock 0-2in Lift - 985-02-018 Fox 2.0 Performance Series Coilover IFP Shock 0-2in Lift - 985-02-018
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Bushwacker 48523 Image 2 GarageMAD4X4
Bushwacker GMC Smootback Ultimate BedRail Cap w/o Stake Pocket - 48523 Bushwacker GMC Smootback Ultimate BedRail Cap w/o Stake Pocket - 48523
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Bushwacker 40105-02 Image 1 GarageMAD4X4
Bushwacker GMC Cut-Out Front Fender Flare (Paintable) - 40105-02 Bushwacker GMC Cut-Out Front Fender Flare (Paintable) - 40105-02
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Bushwacker 48524 Image 2 GarageMAD4X4
Bushwacker GMC Smootback Ultimate BedRail Cap w/o Stake Pocket - 48524 Bushwacker GMC Smootback Ultimate BedRail Cap w/o Stake Pocket - 48524
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Bushwacker 48527 Image 2 GarageMAD4X4
Bushwacker GMC Smootback Ultimate BedRail Cap w/ Stake Pocket - 48527 Bushwacker GMC Smootback Ultimate BedRail Cap w/ Stake Pocket - 48527
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Bushwacker 48525 Image 2 GarageMAD4X4
Bushwacker GMC Smootback Ultimate BedRail Cap w/o Stake Pocket - 48525 Bushwacker GMC Smootback Ultimate BedRail Cap w/o Stake Pocket - 48525
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Fox Monotube Shock 985-02-009
Fox 2.0 Performance Series Smooth Body IFP Shock 0-2in Lift - 985-02-009 Fox 2.0 Performance Series Smooth Body IFP Shock 0-2in Lift - 985-02-009
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Bushwacker 48528 Image 2 GarageMAD4X4
Bushwacker GMC Smootback Ultimate BedRail Cap w/ Stake Pocket - 48528 Bushwacker GMC Smootback Ultimate BedRail Cap w/ Stake Pocket - 48528
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