M1R Monotube Rear Shocks for Silverado/Sierra 1500 (1999-2007)

About this kit

M1R Monotube Rear Shocks, fitment-checked

Rough Country 770738RES_M is a pair of M1R monotube rear shocks with external reservoirs, sold for 1999-2007 Chevrolet and GMC 1500-series trucks in RWD, 4WD, and AWD forms. The 46mm monotube body runs a digressive piston and an internal floating piston, and the assembly carries a 3 Year Limited Warranty.

These M1R monotube rear shocks for the 1999-2007 Silverado 1500 and Sierra 1500 also cover the C1500, K1500, 1500 HD, and the Classic-badged 2007 applications listed in the fitment section, across RWD, AWD, and 4WD. The external reservoir and separated floating piston move heat away from the damping oil, while digressive valving handles rebound and compression independently as the surface changes. The 16mm chromed, case-hardened rod, 2-inch seamless extruded tube, galvanized zinc-plated finish, and vulcanized natural rubber bushings make up the rest of the build. Rough Country lists install time at 1-2 hours.