'99-02 Chevrolet Silverado Fenders | 5" Bulge Jeep JK Fiberwerx The 2001-2010 GM 2500HD/3500 requires

The 2001-2010 GM 2500HD/3500 requires significant shock damping to comply with the massive spring rate of the factory torsion bar system

Unique valving developed for the lighter weight of the 2015-2020 F-150

Chip-resistant

The “stock length” versions do not work with icon leaf springs

the better the small bump compliance will be at proper inflation pressures

'99-02 Chevrolet Silverado Fenders | 5" Bulge Jeep JK Fiberwerx The 2001-2010 GM 2500HD/3500 requiresThese fenders will give your truck an additional 4 inches of tire coverage, a 2 rise and work on all trim motor packages 1500, 2500, 3500, & HD SIZES FEATURES GIVES YOU TIRE CLEARANCE TO RUN LARGER TIRES 33" 37" DEPENDING ON SUSPENSION AND WHEEL OFFSET These will fit a 99 2006 GMC Sierra