2021 GMC Sierra 1500 Truck and Towing
What are you working on today?
Get an exact fit for your 2021 GMC Sierra 1500
SHOP TOWING
trustworthy advice
cool truck accessories and mods
Learn about mods that can help you unlock your truck’s performance, or just customize it for yourself.
what size hitch ball do i need?
Learn how to pick the right size hitch ball and how to level your towing equipment.
everything you should know about light bars
Light bars are the easiest way to massively boost off-road visibility. Learn how they work and how to install them on your truck.
more parts, products and accessories
Most Popular Parts
- 2021 GMC Sierra 1500 Trailer Hitch
- 2021 GMC Sierra 1500 Side Window Deflector
- 2021 GMC Sierra 1500 Bug Deflector
- 2021 GMC Sierra 1500 Truck Tool Box
- 2021 GMC Sierra 1500 Tonneau Cover
- 2021 GMC Sierra 1500 Step Nerf Bar
- 2021 GMC Sierra 1500 Splash Guard
- 2021 GMC Sierra 1500 Running Board
- 2021 GMC Sierra 1500 Grille/Brush Guard
- 2021 GMC Sierra 1500 Truck Bed Mat
- 2021 GMC Sierra 1500 Trailer Brake Control Harness
- 2021 GMC Sierra 1500 Running Board Mount Kit
solutions for trailer lighting and wiring
Trailer Light Troubleshooting
If your lights aren’t turning on, it’s usually a grounding problem in the trailer wiring. Learn how you can test your trailer light installation and ensure they are properly grounded in a few simple steps.
A Guide to Diagnosing Trailer Electrical Problems
Troubleshooting a problem with your trailer wiring? Watch this short video to learn how to use a probe tester to quickly and easily find the answers you need.
LEER tonneau covers
If you want truck bed protection that is strong but lightweight, look no further than LEER’s wide selection of folding, retractable, and fiberglass tonneaus. LEER’s sleek and modern designs will not only improve the style and performance of your truck, but also reduce drag for a more fuel-efficient and aerodynamic ride. When it comes to tonneaus, LEER has you covered.
featured brands
FREQUENTLY ASKED QUESTIONS
Questions? We’ve got you covered.
How much your truck can tow will primarily depend on the type of truck you drive. You can find out how much your truck is rated to safely tow by checking the owner's manual. Some vehicles also have this rating on a tag posted on the inside of the driver's doorjamb.
In essence, installing a trailer hitch means bolting the hitch to threaded holes on a frame. The hitch will come with instructions for installation on your specific vehicle. If you drive an older truck that has not had a hitch installed before, you may need to use a thread tapper to clean the threaded holes before installing.
Just like towing capacity and trailer hitch installation, the right hitch ball depends on your vehicle. The hitch ball you choose will need to be a specific size to keep your trailer level. Learn how to level your trailer and choose the right hitch ball here.
Light bars can help you get a much better view of the road when you're driving off-road or anywhere that light is low. Plus, with the right tools and supplies, installation is a breeze. Check out our step-by-step guide for installing light bars here.
Shop By Category
- 2021 GMC Sierra 1500 Cargo Boxes, Bags and Storage
- 2021 GMC Sierra 1500 Grille and Brush Guard
- 2021 GMC Sierra 1500 Hitches, Balls, Mounts and Hitch Accessories
- 2021 GMC Sierra 1500 Running Boards, Nerf Bars and Steps
- 2021 GMC Sierra 1500 Splash Guards and Fender Flares
- 2021 GMC Sierra 1500 Tonneau Cover and Bed Liner / Mat
- 2021 GMC Sierra 1500 Towing
- 2021 GMC Sierra 1500 Trailer Wiring and Electrical
- 2021 GMC Sierra 1500 Trailer, Flood / Fog and Assorted Lighting
- 2021 GMC Sierra 1500 Truck Bed Accessories
- 2021 GMC Sierra 1500 Truck Boxes and Liquid Storage Tanks
- 2021 GMC Sierra 1500 Vent Visors, Bug Deflectors and Truck Cover
Advice and How-To's
- What Size Tonneau Cover Do I Need?
- Tonneau Cover Buying Guide: Best Tonneau Covers for 2023
- Trailer Hitch Buying Guide: Choosing the Right Hitch for Your Needs
- How Much Does It Cost to Install Trailer Hitches?
- What Is a Tonneau Cover?
- What are the Different Trailer Hitch Types and Classes?
- How to Wire Your Trailer
- Trailer hitch accessories you need for your vehicle
- Best Trailer Hitches for Your Vehicle
- 4-Wheel Drive (4WD): What You Need to Know