GMC R3500 Bed Rails and Caps

Your GMC R3500 will be happy to know that the search for the right Bed Rails and Caps you’ve been looking for is over! Advance Auto Parts has 1 different Bed Rails and Caps for your vehicle, ready for shipping or in-store pick up. The best part is, our GMC R3500 Bed Rails and Caps start from as little as $103.99.

When it comes to your GMC R3500, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top reliable Bed Rails and Caps brands so you can shop with complete confidence. Some of our top Bed Rails and Caps brands are Westin. We’re sure you will get the right product to keep that R3500 running for a long time.

Shop online, find the best price on the right product, and have it shipped right to your door. If you prefer to shop in person for the right Bed Rails and Caps for your R3500, visit one of our local Advance Auto Parts locations and you’ll be back on the road in no time!

Compare 25 GMC Bed Rails and Caps

CURT – Universal 5th Wheel Base Rails (Gloss Black) (Part No.16104)

Universal 5th Wheel Base Rails (Gloss Black)

from

$110.99
CURT 5th wheel base rails are industry-standard, meaning they can be used with any 5th wheel trailer hitch with industry-standard anchoring points. They are compatible with virtually all CURT 5th wheel trailer hitches and many competitors. Installation of CURT universal 5th wheel base rails is quick and simple. They mount with high-strength hardware, providing a solid mounting place for a new 5th wheel hitch. 5th wheel base rail bolts and other hardware can also be purchased separately to aid in reinstalling used rails. To protect our 5th wheel base rails from corrosion, scratches and UV damage, we coat each one in a co-cured finish of A-coat and powder coat. This gives them the tough skin they need for hauling that RV trailer, flatbed or other heavy-duty trailer and gives you the confidence to tow wherever the horizon leads. This set of 5th wheel rails is rated for 25,000 pound gross trailer weight and has a gloss black finish. Knowing that your 5th wheel trailer hitch is properly mounted in your truck bed is vitally important to the success of your towing. Without a firm attachment point, a 5th wheel hitch is rendered useless to your tow vehicle. When you choose a 5th wheel hitch for your pickup, install it with confidence with a CURT 5th wheel bracket kit and a set of CURT 5th wheel base rails.

Product Features:
  • Helps provide a solid mounting point for a 5th wheel hitch
  • Industry-standard mounting point to accept most 5th wheel hitches
  • Designed for use with select CURT custom 5th wheel brackets
  • Protected by a durable gloss black powder coat finish
  • Co-cured in a rust-resistant liquid A-coat
See More

CURT – Universal 5th Wheel Base Rails (Carbide Black) (Part No.16204)

Universal 5th Wheel Base Rails (Carbide Black)

from

$117.99
CURT 5th wheel base rails are industry-standard, meaning they can be used with any 5th wheel trailer hitch with industry-standard anchoring points. They are compatible with virtually all CURT 5th wheel trailer hitches and many competitors. Installation of CURT universal 5th wheel base rails is quick and simple. They mount with high-strength hardware, providing a solid mounting place for a new 5th wheel hitch. 5th wheel base rail bolts and other hardware can also be purchased separately to aid in reinstalling used rails. To protect our 5th wheel base rails from corrosion, scratches and UV damage, we coat each one in a co-cured finish of A-coat and powder coat. This gives them the tough skin they need for hauling that RV trailer, flatbed or other heavy-duty trailer and gives you the confidence to tow wherever the horizon leads. This set of 5th wheel rails is rated for 25,000 pound gross trailer weight and has a carbide black finish. Knowing that your 5th wheel trailer hitch is properly mounted in your truck bed is vitally important to the success of your towing. Without a firm attachment point, a 5th wheel hitch is rendered useless to your tow vehicle. When you choose a 5th wheel hitch for your pickup, install it with confidence with a CURT 5th wheel bracket kit and a set of CURT 5th wheel base rails.

Product Features:
  • Helps provide a solid mounting point for a 5th wheel hitch
  • Industry-standard mounting point to accept most 5th wheel hitches
  • Designed for use with select CURT custom 5th wheel brackets
  • Protected by a highly durable carbide powder coat finish
  • Co-cured in a rust-resistant liquid A-coat
See More

Westin – Bedcaps (Part No.72-40151)

Bedcaps

from

$112.99
Westin Bed Caps, constructed with high-impact ABS, give your vehicle a finished factory look while protecting your bed railing from the elements. Product installs quickly and easily with sturdy 3M tape. Available with or without stake pocket in black finish.

Product Features:
  • Protects bed railing against damage
  • Gives vehicle a finished factory look
  • Installs quickly and easily with 3M tape
  • Matching Tail Cap / Front Cap available
  • Will work with tonneau covers, camper shells and tie-downs if properly installed
  • Available in Smooth or Ribbed style
  • Available with or without stake pocket holes
  • Made in the USA
See More

Westin – Bedcaps (Part No.72-00151)

Bedcaps

from

$119.99
Westin Bed Caps, constructed with high-impact ABS, give your vehicle a finished factory look while protecting your bed railing from the elements. Product installs quickly and easily with sturdy 3M tape. Available with or without stake pocket in black finish.

Product Features:
  • Protects bed railing against damage
  • Gives vehicle a finished factory look
  • Installs quickly and easily with 3M tape
  • Matching Tail Cap / Front Cap available
  • Will work with tonneau covers, camper shells and tie-downs if properly installed
  • Available in Smooth or Ribbed style
  • Available with or without stake pocket holes
See More

Putco – Putco Crossrails (Part No.69855)

Putco Crossrails

from

$733.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • NeveRust (TM) Stainless Steel Construction
  • Solid Die Cast Construction Allows For 1000 Pound Tie Down Strength
  • 500 Pound Tie-Down Strength
  • Easy No Drill Installation Via Stake Pockets
  • Oval Shaped 1-3/4 Inch By 2-1/2 Inch
See More

Putco – Locker Side Rails (Part No.89856)

Locker Side Rails

from

$647.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Solid Die Cast Construction Allows For 1000 Pound Tie Down Strength
  • Tube And End Castings Chromed To 44 CASS Standards For Extra Durability
  • 1 3/4 Inch Tube Diameter
  • 500 Pound Tie Down Strength
  • Easy No Drill Installation Via Stake Pockets
  • Limited Lifetime Warranty
See More

Putco – Direct-Fit, Stake Pocket Mount, Polished, Ss, With Built In Tie Downs (Part No.89896)

Direct-Fit, Stake Pocket Mount, Polished, Ss, With Built In Tie Downs

from

$633.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Solid Die Cast Construction Allows For 1000 Pound Tie Down Strength
  • Tube And End Castings Chromed To 44 CASS Standards For Extra Durability
  • 1-3/4 Inch Tube Diameter
  • 500 Pound Tie-Down Strength
  • Easy No Drill Installation Via Stake Pockets
See More

Putco – Direct-Fit, Stake Pocket Mount, Polished, Ss, With Built In Tie Down (Part No.89855)

Direct-Fit, Stake Pocket Mount, Polished, Ss, With Built In Tie Down

from

$592.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Solid Die Cast Construction Allows For 1000 Pound Tie Down Strength
  • Tube And End Castings Chromed To 44 CASS Standards For Extra Durability
  • 1-3/4 Inch Tube Diameter
  • 500 Pound Tie-Down Strength
  • Easy No Drill Installation Via Stake Pockets
See More

Putco – Putco Ssr Locker Side Rails (Part No.59855)

Putco Ssr Locker Side Rails

from

$513.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Solid Die Cast Construction
  • Entry Level, Value Priced Side Rail
  • 1-3/4 Inch Tube Diameter
  • Stainless Tubes Are Chromed To 44 Hour CASS
  • Easy No Drill Installation Via Stake Pockets, Installs In Minutes
See More

Putco – Putco Locker Side Rails-Black Powder Coated (Part No.88856)

Putco Locker Side Rails-Black Powder Coated

from

$447.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Black Powder Coated Rail For Extra Durability
  • Black Nylon Ends
  • 500 Pound Tie-Down Strength
  • Injection Molded Nylon Casting Stanchion
  • High-Polished Stainless Steel And Coated Black Tube
  • Utilizes Existing Mounting Hardware And Installation Method
  • Easy No Drill Installation Via Stake Pockets
See More

Putco – Direct-Fit, Stake Pocket Mount, Black, Ss, With Built-in Tie Down, With Nylon End (Part No.88855)

Direct-Fit, Stake Pocket Mount, Black, Ss, With Built-in Tie Down, With Nylon End

from

$423.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Black Powder Coated Rail For Extra Durability
  • Black Nylon Ends
  • 500 Pound Tie-Down Strength
  • Injection Molded Nylon Casting Stanchion
  • High-Polished Stainless Steel And Coated Black Tube
  • Utilizes Existing Mounting Hardware And Installation Method
  • Easy No Drill Installation Via Stake Pockets
See More

Putco – Bed Rail: Locker: Black: Black Nylon Ends: Stake Pocket Mnt: Colorado 5 Ft. Box (Part No.88850)

Bed Rail: Locker: Black: Black Nylon Ends: Stake Pocket Mnt: Colorado 5 Ft. Box

from

$334.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Black Powder Coated Rail For Extra Durability
  • Black Nylon Ends
  • 500 Pound Tie-Down Strength
  • Injection Molded Nylon Casting Stanchion
  • High-Polished Stainless Steel And Coated Black Tube
  • Utilizes Existing Mounting Hardware And Installation Method
  • Easy No Drill Installation Via Stake Pockets
See More

Putco – Putco Nylon Traditional Locker Rails (Part No.99855)

Putco Nylon Traditional Locker Rails

from

$311.99
Locker Side Bed Rails add tying loops at each end of the rail for versatile cargo securing rated up to 500 Pound each. Putco Locker Bed Rails come in highly-polished stainless steel and boast 1 3/4 Inch tubing to enhance the tough appearance and rugged performance of your truck.

Product Features:
  • Injection Molded Nylon Casting Utilizing Our Traditional Design
  • High-Polished Stainless Steel Tube
  • Utilizes Existing Mounting Hardware And Installation Method
  • Entry Level, Value Priced Side Rail
  • 500 Pound Per End Tie-Down Strength
  • 1-3/4 Inch Tube Diameter
See More

Westin – Platinum Oval Bed Rails (Part No.50-2070)

Platinum Oval Bed Rails

from

$272.99
Heavy duty 304 polished stainless steel. Flexible mounting system. Accommodates most stake pockets. Easy installation with no drilling required. Accentuates truck appeal. Drill mount hardware is included.

Product Features:
  • Heavy Duty 304 Polished Stainless Steel
  • Flexible Mounting System
  • Accommodates Most Stake Pockets
  • Easy To Install
  • No Drilling Required
  • Accentuates Truck Appeal
  • Drill Mount Hardware Included
  • Lifetime Warranty
See More

Westin – Platinum Oval Bed Rails (Part No.50-2040)

Platinum Oval Bed Rails

from

$256.99
Heavy duty 304 polished stainless steel. Flexible mounting system. Accommodates most stake pockets. Easy installation with no drilling required. Accentuates truck appeal. Drill mount hardware is included.

Product Features:
  • Heavy Duty 304 Polished Stainless Steel
  • Flexible Mounting System
  • Accommodates Most Stake Pockets
  • Easy To Install
  • No Drilling Required
  • Accentuates Truck Appeal
  • Drill Mount Hardware Included
  • Lifetime Warranty
See More

Westin – Platinum Oval Bed Rails (Part No.50-2030)

Platinum Oval Bed Rails

from

$222.99
Heavy duty 304 polished stainless steel. Flexible mounting system. Accommodates most stake pockets. Easy installation with no drilling required. Accentuates truck appeal. Drill mount hardware is included.

Product Features:
  • Heavy Duty 304 Polished Stainless Steel
  • Flexible Mounting System
  • Accommodates Most Stake Pockets
  • Easy To Install
  • No Drilling Required
  • Accentuates Truck Appeal
  • Drill Mount Hardware Included
  • Lifetime Warranty
See More

TrailFX – Stake Pocket Mount, Polished, Ss, Without Tie Down, Not Compatible With Tool Box (Part No.D0009S)

Stake Pocket Mount, Polished, Ss, Without Tie Down, Not Compatible With Tool Box

from

$216.99
When it comes to your truck or SUV, you want quality, style, protection, and durability at a price you can afford. TrailFX offers you an array of products, whether it is for work or play, TrailFX has something for everyone needs. Step bars to grille guards, tool boxes to bed protection, whatever your need, we have you covered. TrailFX sources high quality products for trucks, SUVs, and cars at a price you can afford. Whether you need a nerf step for your SUV, a tool box for your truck, or a bug shield for your car, we want to make sure that you are supplied the quality, style, and durability you expect from a product.

Product Features:
  • Custom Designed For Each Application
  • Highly Polished, Mirror Finish 304 Rust Proof Stainless Steel Construction
  • The Perfect Combination When Used With Other Stainless Steel Accessories
  • Easy Do It Yourself Installation With Hand Tools
  • Easy Do It Yourself Installation With Hand Tools
See More

TrailFX – Stake Pocket Mount, Polished, Ss, Without Tie Down, Not Compatible With Tool Box (Part No.D0001S)

Stake Pocket Mount, Polished, Ss, Without Tie Down, Not Compatible With Tool Box

from

$216.99
When it comes to your truck or SUV, you want quality, style, protection, and durability at a price you can afford. TrailFX offers you an array of products, whether it is for work or play, TrailFX has something for everyone needs. Step bars to grille guards, tool boxes to bed protection, whatever your need, we have you covered. TrailFX sources high quality products for trucks, SUVs, and cars at a price you can afford. Whether you need a nerf step for your SUV, a tool box for your truck, or a bug shield for your car, we want to make sure that you are supplied the quality, style, and durability you expect from a product.

Product Features:
  • Custom Designed For Each Application
  • Highly Polished, Mirror Finish 304 Rust Proof Stainless Steel Construction
  • The Perfect Combination When Used With Other Stainless Steel Accessories
  • Easy Do It Yourself Installation With Hand Tools
See More

TrailFX – Bed Rails, Stake Pocket Mount, Polished, Drilling Required, Chevrolet 8 Foot Bed (Part No.D0006S)

Bed Rails, Stake Pocket Mount, Polished, Drilling Required, Chevrolet 8 Foot Bed

from

$216.99
When it comes to your truck or SUV, you want quality, style, protection, and durability at a price you can afford. TrailFX offers you an array of products, whether it is for work or play, TrailFX has something for everyones needs. Step bars to grille guards, tool boxes to bed protection, whatever your need, we have you covered. TrailFX sources high quality products for trucks, SUVs, and cars at a price you can afford. Whether you need a nerf step for your SUV, a tool box for your truck, or a bug shield for your car, we want to make sure that you are supplied the quality, style, and durability you expect from a product.

Product Features:
  • Fit Your Bed Pockets Perfectly
  • Custom Designed For Each Application
  • Highly Polished, Mirror Finish 304 Rust Proof Stainless Steel Construction
  • The Perfect Combination When Used With Other Stainless Steel Accessories
  • Easy Do It Yourself Installation With Hand Tools
  • Limited Lifetime Warranty
See More

TrailFX – Bed Rails, Stake Pocket Mount, Polished, Not Compatible With Tool Box, Drilling Not Required (Part No.D0002S)

Bed Rails, Stake Pocket Mount, Polished, Not Compatible With Tool Box, Drilling Not Required

from

$216.99
When it comes to your truck or SUV, you want quality, style, protection, and durability at a price you can afford. TrailFX offers you an array of products, whether it is for work or play, TrailFX has something for everyones needs. Step bars to grille guards, tool boxes to bed protection, whatever your need, we have you covered. TrailFX sources high quality products for trucks, SUVs, and cars at a price you can afford. Whether you need a nerf step for your SUV, a tool box for your truck, or a bug shield for your car, we want to make sure that you are supplied the quality, style, and durability you expect from a product.

Product Features:
  • Fit Your Bed Pockets Perfectly
  • Custom Designed For Each Application
  • Easy Do It Yourself Installation With Hand Tools
  • Limited Lifetime Warranty
See More

TrailFX – Stake Pocket Mount, Polished, Ss, Without Tie Down, Not Compatible With Tool Box (Part No.D0007S)

Stake Pocket Mount, Polished, Ss, Without Tie Down, Not Compatible With Tool Box

from

$216.99
When it comes to your truck or SUV, you want quality, style, protection, and durability at a price you can afford. TrailFX offers you an array of products, whether it is for work or play, TrailFX has something for everyone needs. Step bars to grille guards, tool boxes to bed protection, whatever your need, we have you covered. TrailFX sources high quality products for trucks, SUVs, and cars at a price you can afford. Whether you need a nerf step for your SUV, a tool box for your truck, or a bug shield for your car, we want to make sure that you are supplied the quality, style, and durability you expect from a product.

Product Features:
  • Custom Designed For Each Application
  • Highly Polished, Mirror Finish 304 Rust Proof Stainless Steel Construction
  • The Perfect Combination When Used With Other Stainless Steel Accessories
  • Easy Do It Yourself Installation With Hand Tools
  • Easy Do It Yourself Installation With Hand Tools
See More

Dee Zee – Covers Inside And Top Of Rail, Without Stake Holes, Aluminum, Direct-Fit (Part No.DZ11991)

Covers Inside And Top Of Rail, Without Stake Holes, Aluminum, Direct-Fit

from

$166.99
Dee Zee Wrap Side Bed Caps protects the top edge of truck bed. Made from heavy Gauge Brite-Tread Aluminum. Custom fit that wraps the rear corners of the bed for maximum protection. Available with or without stake pocket holes punched out.

Product Features:
  • Made From Brite-Tread Aluminum
  • Contours To Bed Edges
  • Custom Fit Application
  • Made In USA
See More

Bushwacker – Ultimate BedRail Cap (Part No.48503)

Ultimate BedRail Cap

from

$141.99
Ultimate BedRail Cap

Bushwacker – Ultimate BedRail Cap (Part No.48501)

Ultimate BedRail Cap

from

$134.99
Ultimate BedRail Cap

Bushwacker – Ultimate BedRail Cap (Part No.49525)

Ultimate BedRail Cap

from

$134.99
Ultimate BedRail Cap