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 Sierra 1500 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 and 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 # 6012 is custom fit for the GMC Sierra 1500
  • 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

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.

Tech Specs

Download Instructions 6012 Instructions
Level Load Capacity: 5,000 lbs
Average Install Time: 1 to 2 hours
Front or Rear Axle: REAR
Drilling Required (Yes or No): NO
Weight: 20 lbs.
Part 6012 fits:
  • 2006 GMC Sierra 1500 2wd & 4WD
  • 2005 GMC Sierra 1500 2wd & 4WD
  • 2004 GMC Sierra 1500 2wd & 4WD
  • 2003 GMC Sierra 1500 2wd & 4WD
  • 2002 GMC Sierra 1500 2wd & 4WD
  • 2001 GMC Sierra 1500 2wd & 4WD
  • 2000 GMC Sierra 1500 2wd & 4WD
  • 1999 GMC Sierra 1500 2wd & 4WD

Customer Questions & Answers

Have a question about this product? Let one of our experts answer it for you!

Name (optional)

E-mail Address (optional)

We will respond with an answer ASAP.

I have a 2007 gmc sierra classic, slt, 1500 with the 5'9" bed and 6.0 engine with 4 wheel drive. I'm pretty sure its basically a 2006 but wanted to make sure the Hellwig 6012 air spring kit would fit this vehicle. Will this kit work?
Yes, the 2007 classic is the same as the 2006 models. This kit will work on the classic models without a problem.


  • 5.0 out of 5 Overall
  • 100% reviews recommend this product
Review Product
Great product
Does just what it Is advertised to do. Quality is great. install went quick. Happy with the product.
Recommend this Product: YES
2003 Sierra 1500
– Value
– Quality
– Installation
Does the job
Has done everything right as of now. Looks just fine and works very well. Happy with the performance and the price. Install time was rather long but it was worth the time.
Recommend this Product: YES
P Dog
2005 GMC Sierra 1500
– Value
– Quality
– Installation
Super sweet
Easy install and I'm happy with the product
Recommend this Product: YES
2003 gmc 1500
– Value
– Quality
– Installation
worked well
This product was east to install and works great, had it on my truck in less than an hour and doesnt sag when i hook up to my 5th wheel
Recommend this Product: YES
jonny boy
1999 GMC Seirra 1500
– Value
– Quality
– Installation
Great product
These bags work problems and are easy to use and air up and down
Recommend this Product: YES
2004 gmc 1500
– Value
– Quality
– Installation