1999-2006 GM 1500 Limit Strap Kit Front Leveling (110-90223)Used on these older vehicles where the shock was not designed to be the droop limiter which means the upper control arm was taking the abuse and transferring the load to the upper ball joints. Features Limit Strap Kit (Front Leveling) for 99 06 Silverado Sierra 1500 2WD 4WD Torsion Bar Front End Trucks Drive: 2WD 4WD Location: Front Details It is a bolt in installation but requires holes to be drilled to mount the upper end, and there is adjustability