🚛 Elevate your haul game — stay level, stay legendary.
The ACDelco Specialty 504-539 Rear Air Lift Shock Absorber is a precision-engineered suspension upgrade designed for Chevrolet and GMC trucks from 1988 to 2003. With up to 1,100 lbs of temporary load leveling capacity per pair and adjustable air pressure from 25 to 200 psi, it maintains optimal ride height and improves handling under heavy loads. Featuring a corrosion-resistant chromed piston rod, this shock absorber extends durability while reducing suspension wear and undercarriage damage during towing or hauling. Ideal for professionals who demand reliable, customizable performance without exceeding vehicle GVWR.
| Brand | ACDelco |
| Auto Part Position | Rear |
| Style | Adjustable |
| Vehicle Service Type | Truck |
| Exterior Finish | Painted |
| Material | Chrome |
| OEM Part Number | 88946627 |
| Global Trade Identification Number | 00021625318936 |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 021625318936 |
| Manufacturer | ACDelco |
| Model | ACDelco - Rear Air Lift S (Slp) (504-539) |
| Item Weight | 12.67 pounds |
| Product Dimensions | 19.4 x 6.5 x 3.9 inches |
| Item model number | 504-539 |
| Manufacturer Part Number | 504-539 |
P**Y
Great air shocks at a great price.
Was looking for shocks for 94 K1500, saw these in the 50 buck range, ordered. Seem like good quality air shocks, installed them in an evening. Hose kit for filling was included. Replacement bolts were not, had to reuse old ones, luckily they were not frozen from the rust. I used them towing a dual axle trailer with over a ton of scrap metal in it. Seemed to work well. Made in Mexico.
S**W
Works great
These are easy to install and they work great. Put these on my sons 1998 Chevy 1500. Definitely worth the money.
T**R
... one ton Chevy as much as i would have liked, but with 300k on the suspension
Didn't life the old one ton Chevy as much as i would have liked, but with 300k on the suspension, you cant expect miracles. Went on exactly as you would expect. Plenty of hose. I ended up running the valve in the both hole of my licence plate, odd place but it was a perfect fit. They say they hold 200 psi, my compressor only goes up to about 120. At that pressure, i really don't think the shocks have made the ride any rougher. Solid buy, will buy again if i get in the mood for air shocks again.
A**R
Fantastic
Have a 98 k3500 stock suspension with a service utility bed. Bed was sagging because of the large amount weight I have in it. Was going to put airbags on it but at a hefty price tag. Gave these a shot and they worked fantastic. Pumped them up to 200 psi with a high pressure bike pump and raised my bed about 4 inches. Great quality for the price and alot cheaper than airbags.Pretty easy install. Only negative comment I have is the fitting and airlines are all plastic. But have held up find.
R**Y
What a deal
Easy to install and man did it change the way my truck drives. Perfect. And strong
H**D
Ac delco air shocks
I installed these and one went a quarter way up the other one never went up.I messaged Amazon support and the seller. Which was a waste of time. I’m not sure if I will ever order from Amazon again. What a waste of money and time
C**R
Perfect fit.
Perfect replacement for my shocks on a 89 GMC 1500. They were a bit wider but still easy to install.
S**Y
Decent quality for the price
Liked the simplicity in the installation, decent quality for the price. Doesn't hold the psi like I thought it would, but still does the job. Big improvement from the stock shocks.
Trustpilot
2 weeks ago
3 weeks ago
