Product Information

Hellwig #6400 GMC Truck air helper spring kits 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 #6400 air helper springs the superior choice.

Features & Benefits

  • Hellwig # 6400 is custom fit for the GMC Truck
  • Lifetime warranty on brackets, 2 year warranty on air springs
  • Custom for air helper springs for the GMC Truck
  • Heavy duty brackets
  • Virtually eliminates sagging springs
  • 5000 lbs level load capacity
  • Fully adjustable in order to insure improved leveling control
  • Simple bolt-on installation

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

    Note: Never load vehicle beyond the manufacturer's maximum gross vehicle weight rating.

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