Your Results
Fifth wheel hitches for your
2003 GMC Sierra 3500
Long Bed · Nothing At All · 14 hitches match your setup Change truck
Trailer GVWR
How do you want to set this up?
Pick the option that matches your situation. Know your trailer weight? Use the filter above to narrow it down.
Pick your ISR kit
Includes brackets, rails, and hardware for your truck.
PullRite
24K ISR HD Mounting Rail Kit
$551
PullRite
18K ISR SuperRail Mounting Rail Kit
$800
Then pick your fifth wheel hitch
Any of these mount to the rails from your kit.
PullRite
24K ISRX Super 5th
$1,444
PullRite
24K ISRX SuperLite
$1,564
Blue Ox
24K 5th Wheel Hitch
$1,229
PullRite
20K Super 5th
$893
B&W
20K Companion
$899
PullRite
16K SuperGlide
$1,515
7-way wiring
You'll need a 7-way trailer plug in your bed for lights and brakes. Most trucks don't have this from the factory — check your bed before ordering.
Step 1: Get your brackets
These bolt to your truck frame.
Step 2: Get your rails
These mount to the brackets.
Step 3: Pick your fifth wheel hitch
Any of these mount to your rails.
PullRite
24K ISRX Super 5th
$1,444
PullRite
24K ISRX SuperLite
$1,564
Blue Ox
24K 5th Wheel Hitch
$1,229
PullRite
20K Super 5th
$893
B&W
20K Companion
$899
PullRite
16K SuperGlide
$1,515
7-way wiring
You'll need a 7-way trailer plug in your bed for lights and brakes. Check your bed before ordering.
Step 1: Get your ISR kit or brackets + rails
You'll need rails installed first.
PullRite
24K ISR HD Mounting Rail Kit
$551
PullRite
18K ISR SuperRail Mounting Rail Kit
$800
Step 2: ISR Gooseneck Adapter
Mounts to your rails, gives you a gooseneck ball.
Step 3: Gooseneck Pinbox for your trailer
Replace your trailer's pinbox with a gooseneck-compatible one.
Why this setup?
Some prefer gooseneck pinboxes for a smoother ride or more clearance. The ball on rails doesn't have clearance underneath, so Gooseneck Fifth Wheel adapters won't work here.
No products rated for that weight
Nothing rated for lbs. to see all.
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Not Sure Which Type is Right?
Guides that might help
Plain-English explanations — no jargon, no fluff.
Understanding Your Setup
Rails vs Pucks vs Gooseneck
Breaking down the three main bed prep systems — no jargon.
Read guide →Getting Started
How to Choose a Fifth Wheel Hitch
Weight ratings, slider vs fixed, and what actually matters when picking a hitch.
Read guide →