Question: must have gmc sierra accessories?
Answer: Spray-In Bedliner. Your pickup truck's bed is tough, but its painted surface is just as susceptible to scratches and dents as your truck's exterior is. ... 
Running Board. Strong running boards that are attached to the truck's frame provide a sturdy stepping surface. ... 
A Backup Camera. ... 
Bed Lights. ... 
All-Weather Floor Mats. ... 
Bed Cover.