Your search for "2003 Chevrolet Silverado 3500 Base" revealed the following:

Fox Monotube Shock 980-24-958
Fox 2.0 Performance Series IFP Shock Rear 7-10in Lift - 980-24-958 Fox 2.0 Performance Series IFP Shock Rear 7-10in Lift - 980-24-958
Call for Pricing
Bushwacker 49517 Image 2 GarageMAD4X4
Bushwacker Chevrolet OE Style Ultimate BedRail Cap w/o Stake Pocket - 49517 Bushwacker Chevrolet OE Style Ultimate BedRail Cap w/o Stake Pocket - 49517
Call for Pricing
Fox Mono Tube Front Shock 980-24-659
FOX 2.0 Performance Series Shock Rear 4-6IN Lift - Trucks - 980-24-659 FOX 2.0 Performance Series Shock Rear 4-6IN Lift - Trucks - 980-24-659
Call for Pricing
Fox Monotube Shock 980-24-963
Fox 2.0 Performance Series IFP Shock Front 0-1in Lift - 980-24-963 Fox 2.0 Performance Series IFP Shock Front 0-1in Lift - 980-24-963
Call for Pricing
Fox Reservoir Shock 980-24-959
Fox 2.0 Performance Series IFP Reservoir Shock Front 0-1in Lift - 980-24-959 Fox 2.0 Performance Series IFP Reservoir Shock Front 0-1in Lift - 980-24-959
Call for Pricing
Bushwacker 48507 Image 2 GarageMAD4X4
Bushwacker Chevrolet / GMC Smoothback Ultimate BedRail Cap w/o Stake Pocket - 48507 Bushwacker Chevrolet / GMC Smoothback Ultimate BedRail Cap w/o Stake Pocket - 48507
Call for Pricing