Fitment: 
For  2007-2018 Chevy Silverado 1500 2500HD 3500HD, 
For  2007-2018 GMC Sierra 1500 2500HD 3500HD (Not include 2007 Classic Models)

Specifications:
>>【FUNCTION】Allows your heavy tailgate to be lowered smoothly and safely without having to worry about a loud noise when the tailgate is down.
>>【MATERIAL】Made of high quality solid steel to achieve better durability and higher strength.
>>【PROCESS】Black powder coating：can further improve the overall corrosion resistance, prolong the service life, and maintain an attractive appearance in the next few years.
>>【PRECISION】Computer-aided design and laser-cut to ensure the perfect fit.
>>【INSTALLATION】Easy installation，No drilling required，Only takes 10 minutes，come with Installation Instruction.
>>【TOOLS REQUIRED】WRENCH/SOCKET，TAPE MEASURE，PLIERS.
>>【NOTE】CAN ONLY BE INSTALLED ON THE DRIVER’S SIDE.

Package Included:
>> （1）—TAILGATE ASSIST SHOCK
>> （1）—TOP BALL MOUNT PLATE
>> （1）—BOTTOM BALL MOUNT PLATE
>> （1）—BLIND NUT TOOL
>> （1）—BOLT
>> （1）—INSTALLATION INSTRUCTION