[2WD MODELS ONLY] - BOLT ON - Both (2) Brand New Driver & Passenger Side Front Lower Ball Joint 10-Year Warranty - [2WD MODELS ONLY] 2WD MODELS ONLY 1999-06 Chevrolet Silverado 1500 - [1999-2006 GMC Sierra 1500 2WD] - Detroit Axle Suspension Control Arms are ready to meet the rigorous demands of today's foreign and domestic passenger cars, trucks and SUVs Detroit Axle is a leading supplier of ride control products to OE vehicle manufacturers Nationwide, that expertise translates to Detroit Axle's OE-quality 10-Year Unlimited Warranty fits Coil spring suspension only, goes to lower control arm K620264 + K620265 (Bolt on)