Product Information

Using the heaviest duty brackets on the market Hellwig air helper spring kits are tough to beat. Designed to give you the benefit of better handling and control under heavily loaded conditions. These air helper springs are installed between the frame of GMC Truck and the suspension, providing load support through the use of air pressure. Heavy duty brackets, higher test pressure and a longer stroke make Hellwig air helper springs the superior choice.

Features & Benefits

  • Includes heaviest duty mounting brackets in the market today
  • Lifetime warranty on brackets, 2 year warranty on air springs
  • 5000 lbs level load capacity
  • Hellwig # 6400 is custom fit for the GMC Truck
  • Virtually eliminates sagging rear suspension while towing or hauling
  • Improves ride control and handling
  • Fully adjustable via air pressure
  • Simple bolt-on installation
  • Fully compatible with Air Lift and Firestone compressor systems for convenient in cab control

Tech Specs

Download Instructions 6400 Instructions
Level Load Capacity: 5,000 lbs
Average Install Time: 1 to 2 hours
Front or Rear Axle: REAR
Drilling Required (Yes or No): YES
Weight:
51 lbs.
SKU #6400 Fits:
  • 1987 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1986 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1985 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1984 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1983 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1982 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1981 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1980 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1979 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1978 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1977 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1976 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1975 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1974 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • 1973 GMC Truck 1/2, 3/4 & 1 ton 2wd
  • Installation Notes

    1. Note: Never load vehicle beyond the manufacturer's maximum gross vehicle weight rating.
    2. Fully compatible with Air Lift and Firestone compressor systems.

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