Manufactured by Air lift | 57272 | 1999-06 Silverado/Sierra 1500 4wd AirLift Load Lifter 5000 Series, Does not fit 1500HD models Up to 5,000 lbs. of load-leveling capacity* Eliminates squat, trailer sway, rough ride and bottoming out Now fits 1/2 ton pickup trucks Does not fit Quadrasteer., Level your load, like you mean it. Level your massive loads in safety and comfort. Up to 5,000 lbs. load-leveling capacity* Fits 1/2-, 3/4-, and 1-ton pickups and vans with leaf springs Roll plates protect the air springs from possible abrasion and increase load capacity up to 10 percent Most popular kits offer no-drill installation Kit includes; 2 air springs All necessary mounting brackets All of the hardware needed for installation Fully-illustrated installation guide Product information updated on 2023-08-21