Offset Gooseneck Hitch Ball Kit for a Short Bed 2021 GMC Sierra 3500
Updated 09/26/2025 | Published 05/01/2025
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Question:
Have 2021 gmc 3500 sierra short bed 6.5 bed, will the curt 60663 fit
asked by: Tim G
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Expert Reply:
Hey Tim, thanks for reaching out!
The Curt Multi-Fit Ball Kit w/ 4" Offset # C68ZV (60663) will only fit your 2021 GMC Sierra 3500 if it has the 8' bed and OEM puck system.
Since you have a short bed, the only offset gooseneck hitch ball kit that will work is the Gen-Y # GY55XR. This actually offers a 5" offset as opposed to the 4" offset of the Curt kit.
The puck pattern for the long and short GM trucks is different in relation to the gooseneck hitch ball hole. Why GM decided to go that route is beyond me, but that's why the Curt kit isn't interchangeable.
What gooseneck ball do you currently use?
Product Page this Question was Asked From
Curt Multi-Fit Ball Kit w/ 4" Offset for Factory Gooseneck Hitches - 30K
- Gooseneck Hitch
- Above the Bed
- Fixed Offset Ball
- 7500 lbs TW
- 30000 lbs GTW
- Built-In Loop
- CURT
more information >
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on Gooseneck Hitch
Jon G.
9/26/2025
Hey Tim, did you have a chance to try the Gen-Y hitch ball kit with your Sierra? I'm curious to know if it worked out for you, as it could help others with similar setups.