MANUFACTURER PART NUMBER: R38RS55263. Replaces Part Numbers & Specifications PRODUCT TYPE: SHOCK ABSORBER AND STRUT ASSEMBLY. SIERRA 1500 SLT ALL ENGINES 1999-2006 WITH FRONT COIL SPRING, WITH 0 IN. SIERRA 1500 HD SLT 8 CYL 6.0L 2006 WITH FRONT COIL SPRING.