Part Notes: Silverado, Sierra; 5.3l; 1/2 Ton; 2WD; W/Engine Code B;Silverado, Sierra; 5.3l; 1/2 Ton; 2WD; W/O Engine Code B; Crew Cab; W/Hd Trailer Equip; W/Spring Special;Silverado, Sierra; 5.3l; 1/2 Ton; 2WD; W/O Engine Code B; Extended Cab; 134" Wheelbase; W/Hd Trailer Equip;Silverado, Sierra; 5.3l; 1/2 Ton; 2WD; W/O Engine Code B; Extended Cab; 143" & 157" Wheelbase; W/Hd Trailer Equip; W/Spring Special;Silverado, Sierra; 5.3l; 1/2 Ton; 4WD; W/Engine Code B;Silverado, Sierra; 5.3l; 1/2 Ton; 4WD; W/O Engine Code B; W/Hd Trailer Equip