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

Products Featured in This Question

Firestone Ride-Rite Air Helper Springs - Double Convoluted - Rear Axle

(3116)

$421.14

Air Lift WirelessONE Compressor System for Air Helper Springs - Remote - Bluetooth - EZ Mount

(646)

$539.43

Air Lift Universal Air Spring Spacers for LoadLifter 5000 and 7500XL - 2" Lift - Qty 2

(44)

$98.72

Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle

(1436)

$552.96

Lift Spacers for Firestone Ride-Rite Air Helper Springs - 2" Spacers - Qty 2

(51)

$97.94

Lift Spacers for Firestone Ride-Rite Air Helper Springs - Vehicles w/ 4" Lift

(7)

$132.96

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?

expert reply by: Jesse M

AL88388
(click to enlarge)

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?

Jeremy C.

12/15/2025

@JesseM Hello Jesse, Unfortunately the items didn't get delivered in time for me to have installed prior to my trip as we were hoping. I will be installing in the coming weeks and will let you all know how it goes. I intend to have valving installed to an air power tank (rather than onboard compressor) so that I have aux air for other items as well.

Jesse M.

12/15/2025

@JeremyC Thanks for the update, Jeremy, and I appreciate your patience. I’m sorry the shipment didn’t arrive in time for your trip, but I’m glad to hear you’ll be moving forward with the install soon. I’d love to hear how everything turns out once you have the system set up, especially with the tank based air setup. Let me know if you need anything along the way.