2011 GMC Sierra Shock and Strut Set Sierra 1500 - SL - 4WD - Optional Twin Tube Replacement - w/o Elec. Susp. - Front and Rear - Kit guaranteed to replace your current 2011 GMC Sierra Shock and Strut Set Sierra 1500 - SL - 4WD - Optional Twin Tube Replacement - w/o Elec. Susp. - Front and Rear - Kit. 2011 GMC Sierra Shock and Strut Set comes new OEM 2011 GMC Sierra Shock and Strut Set aftermarket new 2011 GMC Sierra Shock and Strut Set of remanufactured 2011 GMC Sierra Shock and Strut Set Sierra 1500 - SL - 4WD - Optional Twin Tube Replacement - w/o Elec. Susp. - Front and Rear - Kit.