SuperSprings Custom Suspension Stabilizer and Sway Control Kit
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2003 GMC Safari
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2003 GMC Safari
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Heavy trailers and bed loads can push your suspension past its comfort zone, but these helper leaf springs add up to 1,800 lbs of extra support right where it’s needed. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit bolts above your factory leaf springs to keep your rear end from sagging and to maintain a level ride. With no air pressure to manage or tubing to check, they automatically adjust as weight changes, giving you predictable handling and safer braking when you’re towing or hauling.
Crosswinds and passing semis can make a big truck feel like it’s rocking side to side. These helper springs act like built-in sway bars, keeping your factory springs from twisting and reducing body roll by up to 30 percent. They steady the vehicle through windy stretches, tight turns, or highway turbulence so steering feels more stable and the ride feels planted.
Every setup is a little different, so the included shackles let you dial in how much support you want. Choose an upper-hole setting for more constant load support and added height, a lower-hole position to keep the stock ride feel, or a mix of both ends for balanced support and comfort. This flexibility makes it easy to fine-tune ride quality for your typical load without extra parts or adjustments later.
Installation is straightforward—these springs mount above your existing leaf packs with no drilling required. Dense polyurethane pads seat between the factory springs and the SuperSprings to prevent shifting on certain setups. Once installed, they work automatically with no air lines, compressors, or upkeep needed. The design extends the life of your suspension, tires, and brakes while keeping you ready for the next heavy haul or long trip.
Ratings & Reviews
John
9/3/2026
The product works great after a year. I highly recommend the super springs for any heavy loads. After they are installed you never need to worry about the load.
Jerry B.
9/3/2026
Gwendolyn Y.
4/23/2026
Thanks for your feedback, Bob! We’re glad to hear the shackles made a noticeable improvement in your ride quality. We appreciate you pointing out the fitment challenge and the issue with the instructions, I'll pass it on to SuperSprings.
Javier G.
10/21/2025
They are working out fantastically! Now we dont bottom out and damage the sewer dump. Weve been all a long road trips and nothing is bothering us now in regards to suspension.
T
3/6/2026
Works great towing and seems to help with some sag and roll. I use them along with airbags so towing my fifth wheel is now worry free.
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Nick S.
12/1/2025
That is great to hear! I am glad this addition has worked well for your setup. What RV do you have that you added this too?