Will Air Lift Air Bag Kit AL88388 Require Spacers For 2020 GMC 1500 AT4 With Additional 2" Lift?
Updated 12/15/2025 | Published 11/26/2025
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Question:
Good Morning, I am looking to get airbags for my 2020 GMC Sierra 1500 AT4. I have narrowed it down to PN AL88388 and the PN F2609. I noticed that on the Firestone PN F2609 it states that you need the spacer if you have a 2 Lift but i dont see that requirement on the All Lift AL88388. I have a 2 lift on top of the AT4 Stock Lift and I want to know if I need any spacer kits for the All Lift AL88388. I look forward to hearing from your team. Thank you
asked by: Jeremy C
Expert Reply:
Hello Jeremy, thanks for reaching out. You are on the right track with the Air Lift # AL88388 and Firestone # F2609 being the correct options for your 2020 GMC Sierra AT4. Since your truck has an additional 2" lift on top of the AT4 stock lift, you will need an additional spacer regardless of which kit you go with.
The Air Lift # AL88388 is designed for the AT4 stock 2" lift, but an additional spacer would be needed since you have additional lift. The air lift 2" spacer is part # AL52420.
The Firestone # F2609 needs the 2" spacer part # F2366 just to accommodate the AT4 lift. So you would be better off getting the 4" spacer part # F2371.
Personally I recommend the Air Lift. It is designed specifically for the AT4 model. I like the Air lift kits better in general. Their brackets are a bit more "custom" compared to the Firestone, so they will be easier to assemble and install.
I also recommend adding an onboard compressor. The Air Lift WirelessONE Compressor System for Air Helper Springs # AL25980EZ. This will allow you to monitor and fill the bags with your smartphone.
What kind of trailer do you have? Do you tow often?
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Firestone Ride-Rite Air Helper Springs - Double Convoluted - Rear Axle
- Vehicle Suspension
- Towing/Load Leveling
- Air Springs
- Suspension Only
- Heavy Duty
- Rear Axle Suspension Enhancement
- Firestone
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Jesse M.
12/8/2025
Hey Jeremy, how did things go with the Air Lift setup on your Sierra AT4 after adding the spacer? Your results could really help others trying to match airbags with a lifted AT4. Did you end up pairing it with the onboard compressor too?