Air Lift SlamAir for lowered trucks. 59202Air LiftOriginal price was $734.99. Current price is $532.99.Out of Stock
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SlamAir fits most lowered trucks with a 2, 4, or 6 inch drop, including trucks with flipped axles or notched frames.
Restore load carrying capacity and eliminate bottoming out by adding SlamAir air helper springs to your lowered vehicle. SlamAir kits supplement a lowered truck's leaf springs to provide adjustable spring rate for ride comfort, safety and variable loads. Easy to install between your existing springs and the vehicle frame, they are made with rugged, durable components for long, reliable service. Air Lift SlamAir kits fit most lowered trucks with a 2 -- 6 inch drop, including trucks with flipped axles and notched frames. SlamAir air helper springs are air adjustable from 5 to 100 PSI and come with quick connecting, easy-to-use air fittings. They also come standard with a limited lifetime warranty and an exclusive 60 day ride satisfaction guarantee.
Air Lift Company has developed dependable air spring suspension products since our inception in 1949. Our original product, a rubber air spring inserted into a car’s factory coil spring, was created and patented in 1950. We’ve come a long way since 1949 and are proud to be a dedicated suspension specialist company.
Today, Air Lift load support products are sold worldwide and are engineered to fit over 540 vehicles. Our extensive product line offers air helper springs for trucks, RVs, SUVs, CUVs, and vans, as well as the most technologically advanced on-board air compressor systems for on-the-go air spring control.
Air Lift leads the industry in no-drill applications – kits that bolt onto your vehicle’s frame, speeding the installation process. Our teams work constantly to bring innovative products to you and upgrade existing products with the latest technology.
All of our efforts are spent ensuring your safety and comfort by designing, engineering, and manufacturing the highest quality suspension products. We are a family-owned business based in Lansing, Michigan, and make your family and cargo’s safety our top priority.
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2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 1999 - 2017 | Chevrolet Silverado 1500 | Fits 4: 6" drops only Does not fit long bed |
| 1999 - 2016 | GMC Sierra 1500 | Fits 4: 6" drops only Does not fit long bed |
The Air Lift SlamAir Adjustable air springs for lowered trucks. 59209 (Part #BBCG59209) fits the following vehicles: Chevrolet Silverado 1500; 1999-2016 GMC Sierra 1500. Always verify your specific year, make, and model before ordering.
The Air Lift SlamAir Adjustable air springs for lowered trucks. 59209 (Part #BBCG59209) fits Chevrolet Silverado 1500 models. The 2016 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the Air Lift SlamAir Adjustable air springs for lowered trucks. 59209 (Part #BBCG59209) is designed to fit the Chevrolet Silverado 1500.
The Air Lift SlamAir Adjustable air springs for lowered trucks. 59209 (Part #BBCG59209) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The SlamAir is an air spring suspension kit designed for lowered Chevrolet Silverado and GMC Sierra trucks. It uses two air springs (part 58482) mounted between the frame and axle to support the vehicle's weight and maintain ride height. The kit allows you to adjust air pressure to fine-tune ride height, comfort, and stability. It does not change your vehicle's GVWR or payload capacity.
The SlamAir kit is designed for Chevrolet Silverado and GMC Sierra trucks in GMT 800 (1999–2007) and GMT 900 (2007 and later) generations. However, because this is a universal kit for custom lowering applications, fitment depends on the type of lowering kit already installed on your vehicle. Air Lift cannot guarantee it will fit every vehicle configuration. You may need to modify or weld the upper bracket depending on your lowering kit type and optional equipment. Contact Air Lift customer service at (800) 248-0892 to confirm fitment for your specific vehicle.
Any load assist product, including the SlamAir kit, could affect brake performance on vehicles equipped with a rear brake proportioning valve. Air Lift recommends checking with your vehicle's dealer before installing this kit. If your vehicle does not have a rear brake proportioning valve or is equipped with an anti-lock brake system, installation will have no effect on brake system performance.
The kit requires a minimum of 5 inches of clearance between the frame and tire when the air spring is fully inflated. This clearance must be measured at the custom ride height of your lowered vehicle.
Required tools include: hoist or floor jacks, safety stands, safety glasses, torque wrench, ratchet with 3/8", 9/16", and 1/2" deep well sockets, 3/8" and 9/16" drill bits (very sharp), 3/8" nut driver, 1/2", 3/4", 7/16", and 1-1/16" open-end or box wrenches, heavy-duty drill, hose cutter or sharp knife, air compressor or compressed air source, and spray bottle with dish soap/water solution.
The kit includes: 2 air springs (58482), 1 installation tool with nut (10549), 2 upper brackets (07940), 2 lower brackets (03616), 2 clamp bars (01426), 2 U-bolts (10583), 4 washer head frame bolts (17159), 2 3/4" nylon nuts (18454), 12 3/8" flat washers (18444), 8 3/8" oversized flat washers (18447), 12 3/8" nyloc nuts (18435), 2 1/2"-13 x 7/8" bolts (17124), 2 1/2" flat washers (18414), 8 3/8"-16 x 4" bolts (17145), 4 3/8"-16 x 1.5" self-tapping bolts (17129), 8 frame spacers (13240), 2 swivel air fittings (21848), 2 3/8" spacers (18442), 2 L-brackets (10487), 2 7/16" spacers (18443), 2 square spacers (13377), 1 air line assembly (20086), 6 zip ties (10466), 2 valve caps (21230), 2 5/16" flat washers (18405), 2 rubber washers (21234), 2 star washers (18411), and 4 5/16" hex nuts (21233).
No, replacement U-bolts are not included in the kit. The manual recommends that U-bolts be replaced with new ones (not provided) when installing the L-brackets for flipped axle lowering applications.
The manual does not specify that the battery must be disconnected for SlamAir installation.
Custom ride height is the distance between the bottom edge of the wheel-well and the center of the hub when the vehicle is in its lowered condition. It is critical for installation because the vehicle must be at this exact height when positioning and attaching the upper bracket. The installation tool uses this reference to ensure proper air spring alignment and mounting hole placement. If your leaf springs are sagging badly, you may need to use a jack to raise the rear end to achieve the correct custom ride height before proceeding.
Yes, you must raise the vehicle and remove the wheels before installation. After raising the vehicle, ensure it is at the custom, lowered ride height. If using an axle contact hoist, place axle stands under the frame and lower the axle as needed. If using a frame contact hoist, place axle stands under the axle and lower the frame as needed.
The installation tool (part 10549) is a rigid assembly that helps position the upper bracket correctly and ensures proper air spring alignment. It attaches to both the upper and lower brackets and self-aligns the upper bracket. The threaded section ensures the air spring can only be mounted at the correct height. You assemble it by securing the upper bracket (C) to the tool using the provided nylon nut (H), then loosely attach the tool to the lower bracket using a 1/2" flat washer (M) and 1/2" bolt (L). The tool is removed after drilling the upper bracket mounting holes.
GMT 800 (1999–2007) classic models mount the air spring forward of the axle. GMT 900 (2007 and later) models mount the air spring behind the axle. This difference applies to both standard and flipped axle lowering installations. The upper bracket attachment procedure also differs between the two generations: GMT 800 uses a reinforcing frame ridge for mounting, while GMT 900 requires frame spacers and different hole drilling procedures.
1. Set the installation tool assembly on the leaf spring. 2. Place the hook end of the lower bracket (D) over the stock U-bolt or the edge of the L-bracket (for flipped axle applications). This prevents the bracket from walking up the leaf spring. 3. Attach the lower bracket to the leaf spring using the supplied U-bolt (F), lower clamp bar (E), 3/8" flat washers (I), and nyloc nuts (K). 4. Torque to 16 ft/lbs. The bracket will pull down flat to the leaf spring when the nuts are tightened.
Yes. In some situations, the upper bracket will need to be mounted in an inverted "legs up" position to achieve the correct mounting position. This is typical for shackle or complete leaf spring replacement lowering kits. The manual states that you should carefully read the instructions for proper installation and not hang the axle on a frame contact hoist while checking this step. The vehicle suspension must be in custom ride height condition.
1. Using the slot in the lower bracket (D), push the upper bracket (C) against the frame rail. 2. Use the pal nut on the threaded portion of the installation tool and a supplied nylon nut to adjust the upper bracket so that the upper bracket legs are flat against the frame rail and all four holes are in the middle section of the frame. 3. The mounting holes must stay 3/4" from the rounded edges of the frame rail. 4. At least 1.25" must be left above the top of the upper bracket for air fitting clearance. The brackets can be mounted anywhere within the threaded range of the installation tool. The vehicle must be at custom ride height.
Yes, drilling is required. You must drill holes in the frame to attach the upper bracket. For GMT 800 models, you drill a 3/8" hole for the rear lower hole and a 5/16" hole for the forward lower hole. For GMT 900 models, you drill 3/8" holes through the frame for all mounting hardware, and then enlarge the inside holes to 9/16" to accommodate frame spacers. Before drilling, you must check the back side of the frame for clearance issues such as brake lines, gas lines, and electrical lines, and temporarily relocate any obstacles.
For GMT 800 (1999–2007) models: 1. Drill a 3/8" hole for the lower rear hole (center punch first). 2. Drill a 5/16" hole for the forward lower hole (center punch first). 3. Drill a 5/16" hole in the forward upper hole. 4. Drill a 3/8" hole in the rear upper hole. Use a very sharp 3/8" and 9/16" drill bit.
For GMT 900 (2007 and later) models: 1. Drill 3/8" holes through the frame for all four mounting holes. 2. Enlarge the inside holes only to 9/16" to accommodate frame spacers (P). The outside holes remain 3/8". Use a very sharp 3/8" and 9/16" drill bit. You may need to unbolt and move the brake line bracket on the driver side for drilling clearance.
Yes. The air line assembly (AA) must be cut in two equal lengths. When cutting or trimming the air line, use a hose cutter, razor blade, or sharp knife to make a clean, square cut. Do not use wire cutters or scissors, as these tools may flatten or crimp the air line, causing it to leak around the O-ring seal inside the elbow fitting. After routing the air line along the frame, cut off the air line leaving approximately 12" of extra air line, again ensuring a clean square cut.
Yes. You must drill a 5/16" hole to install the inflation valve. Choose a convenient location such as the wheel well flanges, license plate recess in bumper, under the gas cap access door, or through the license plate itself. Make sure there is enough clearance around the inflation valve for an air chuck.
Possibly. The manual states that you may need to modify the upper bracket, or even weld it, depending on the type of lowering kit the vehicle was lowered with or optional equipment present. Because this is a universal kit for custom applications, Air Lift cannot guarantee it will fit every vehicle without modification. Contact Air Lift customer service at (800) 248-0892 if you have questions about modifications needed for your specific vehicle.
The lower bracket U-bolt (F) should be torqued to 16 ft/lbs using the supplied U-bolt (F), lower clamp bar (E), 3/8" flat washers (I), and nyloc nuts (K).
The nylon nut (H) on the upper threadpost of the air spring should be tightened to 4 ft/lbs. Do not overtighten.
Install the air fitting into the top of the air spring and tighten with your fingers first. Then seal the fitting by tightening one and a half turns with a 7/16" open-end wrench, being careful to tighten on the metal hex nut only. Do not overtighten. The swivel air fitting is precoated with a sealant.
The manual states to "tighten securely" for GMT 900 upper bracket bolts but does not provide a specific torque value. For GMT 800 models, the rear lower hole frame bolt is tightened securely after initial attachment. Contact Air Lift customer service at (800) 248-0892 for the specific torque value for GMT 900 upper bracket bolts.
After aligning the air spring, torque the L-bracket U-bolts to OEM specifications. The manual does not provide a specific torque value; you should refer to your vehicle's original equipment manufacturer specifications.
1. Choose a convenient location for the inflation valve (wheel well flanges, license plate recess, under gas cap, or through license plate). Ensure clearance for an air chuck. 2. Drill a 5/16" hole. 3. Place a 5/16" nut (GG) and star washer (FF) on the air valve, leaving enough valve exposed to extend through the hole. 4. Push the inflation valve through the hole and secure with rubber washer (EE), flat washer (DD), and another 5/16" nut (GG). Tighten the nuts to secure. Approximately 1/2" of valve should be exposed for easy pressure gauge or air chuck application. 5. Route the air line along the frame to the air fitting on the air spring, maintaining at least 6" clearance from heat sources (exhaust, muffler, catalytic converter). Use plastic tie straps (BB) to secure the air line to fixed, non-moving points. Leave at least 2" of slack for movement. 6. Cut the air line leaving approximately 12" of extra length with a clean square cut. Insert into the 90° swivel fitting until it bottoms out (9/16" of air line should be in the fitting).
Route the air line along the frame to the air fitting on the air spring. Keep at least 6 inches of clearance between the air line and heat sources such as exhaust pipes, muffler, or catalytic converter. Avoid sharp bends and edges. Use plastic tie straps (BB) to secure the air line to fixed, non-moving points along the chassis. Ensure the tie straps are tight but do not pinch the air line. Leave at least 2 inches of slack to allow for any movement that might pull on the air line.
Minimum air pressure: 10 PSI. Maximum air pressure: 100 PSI. The minimum pressure must be maintained at all times to keep the air spring in shape and ensure it moves throughout its travel without rubbing or wearing on itself. Never exceed 100 PSI. Failure to maintain correct minimum pressure will void the warranty.
No. The installation of the SlamAir kit does not alter the Gross Vehicle Weight Rating (GVWR) or payload of the vehicle. You must check your vehicle's owner's manual and not exceed the maximum load listed for your vehicle. Exceeding the GVWR is dangerous and voids the Air Lift warranty.
Gross Vehicle Weight Rating (GVWR) is the maximum allowable weight of the fully loaded vehicle, including passengers and cargo. This number is shown on the vehicle's Safety Compliance Certification Label along with tire, rim size, and inflation pressure data. Payload is the combined, maximum allowable weight of cargo and passengers that the truck is designed to carry. Payload equals GVWR minus the Base Curb Weight.
No. Compressed air can cause injury and damage to the vehicle and parts if not handled properly. Do not try to inflate the air springs until they have been properly secured to the vehicle.
The air spring can compress to 2.4 inches and extend to 7.0 inches. Regardless of load, the air pressure should be adjusted so that the custom ride height is maintained at all times. The air spring should not be the suspension limiter in compression or extension; the shock absorber is usually the limiter on extension. If this is not the case, you should consider the use of limiting straps.
Keep at least 6 inches of clearance between the air line and heat sources such as exhaust pipes, muffler, or catalytic converter. If a heat shield was included in the kit, install it. If there is no heat shield but one is required, call Air Lift customer service at (800) 248-0892.
Before operating, perform these checks: 1. Clearance test — Inflate the air springs to 60 PSI and ensure at least 1/2" clearance from anything that might rub (tire, brake drum, frame, shock absorbers, brake cables). 2. Leak test — Inflate to 30 PSI and check all connections for leaks. All leaks must be eliminated before road testing. 3. Heat test — Ensure at least 6" clearance from heat sources. 4. Fastener test — Recheck all bolts for proper torque. 5. Road test — Road test the vehicle after the preceding tests. Inflate to 25 PSI (50 PSI if loaded). Drive 10 miles and recheck for clearance, loose fasteners, and air leaks.
1. Inflate the air spring to 30 PSI. 2. Spray all connections and the inflation valves with a solution of 1/5 liquid dish soap and 4/5 water. 3. Look for bubbles in the soapy water to spot leaks easily. 4. After the test, deflate the springs to the minimum pressure required to restore the custom ride height, no less than 10 PSI. 5. Check the air pressure again after 24 hours. A 2–4 PSI loss after initial installation is normal. Retest for leaks if the loss is more than 5 PSI.
The overnight leak down test should be performed after the vehicle has been used for 24 hours. Recheck the air pressure after 24 hours. If the pressure has dropped more than 5 PSI, there is a leak that must be fixed. Either fix the leak yourself or return to the installer for service. A 2–4 PSI loss after initial installation is normal.
After 30 days or 500 miles (whichever comes first), you must recheck the air spring system. Inspect for any signs of rubbing or abrasion. If found, identify the source and move it if possible. If relocation is not possible, the air spring may need to be remounted. If professionally installed, consult the installer. Check all fasteners for tightness.
Check the air pressure weekly. Always maintain normal ride height. Never inflate beyond 100 PSI.
1. Check air pressure weekly. 2. Always maintain normal ride height. Never inflate beyond 100 PSI. 3. If you develop an air leak, use a soapy water solution to check all air line connections and the inflation valve core before deflating and removing the spring. 4. When increasing load, adjust air pressure to maintain normal ride height. Loads carried behind the axle (including tongue loads) require more leveling force (pressure) than those carried directly over the axle. 5. Always add air in small quantities, checking pressure frequently. Sleeves require less air volume than a tire and inflate quickly. 6. If raising the vehicle by the frame, ensure the system is at minimum pressure (10 PSI) to reduce tension on suspension/brake components. On-board leveling systems do not require deflation or disconnection.
Yes, the vehicle can be lifted on a hoist for short-term service work such as tire rotation or oil changes. However, if the vehicle will be on the hoist for a prolonged period of time, support the axle with jack stands to take the tension off the air springs.
If the air springs are properly installed and maintained, they can last indefinitely.
1. Check the air line connection by deflating the spring and removing the line by pulling the collar against the fitting and pulling firmly on the air line. Trim 1 inch off the end of the air line. Be sure the cut is clean and square. Reinsert the air line into the push-to-connect fitting. 2. Check the threaded connection by tightening the swivel fitting another 1/2 turn. If it still leaks, deflate the air spring, remove the fitting, and re-coat the threads with thread sealant. Reinstall by hand tightening as much as possible, then use a wrench for an additional two turns.
1. Check the valve core by tightening it with a valve core tool. 2. Check the air line connection by removing the air line from the barbed type fitting. Do not cut the air line completely off, as this will nick the barb and render the fitting useless.
If the preceding troubleshooting steps have not resolved the problem, call Air Lift customer service at (800) 248-0892 for assistance. The leak is most likely caused by a failed air spring (either a factory defect or an operating problem), and you may need a replacement air spring.
The manual identifies these potential causes: 1. Leak at air line connections, threaded connection of the elbow into the air spring, or inflation valves. 2. Dirt debris in the valve core. 3. Pinched air lines (tie straps may be too tight). 4. Holes and cracks in the air line. 5. Kinks or folds in the air line. 6. Failed air spring (factory defect or operating problem). A 2–4 PSI loss after initial installation is normal. If loss exceeds 5 PSI, retest for leaks.
No. Air pressure can be adjusted with any type of compressor as long as it can produce sufficient pressure to service the springs. Even a bicycle tire pump can be used, but it requires significant effort.
Pressure tuning depends on three factors: 1. Level vehicle — If headlights are shining into the trees or the vehicle is leaning to one side, raise the air pressure to level it. 2. Ride comfort — If the ride is rough and harsh, try different pressures to find the best comfort. Too much or too little pressure can cause harshness. 3. Stability — Stability should be the priority for safety. Stability issues include roll control, bounce, dive during braking, and sponginess. Tuning these problems usually requires an increase in pressure. Start with the vehicle level or slightly above. When in doubt, always add air. Adjust pressure up and down to find the best ride.
For motorhomes, start with 50–100 PSI in the rear because it can be safely assumed that it is heavily loaded.
Yes. It may be necessary to maintain different pressures on each side of the vehicle. Loads such as water, fuel, and appliances will cause the vehicle to be heavier on one side. As much as a 50 PSI difference is not uncommon.
If the front of the vehicle dives while braking, increase the pressure in the front air bags, if equipped.
If it is suspected that the air springs have bottomed out, increase the pressure. Bottoming out occurs when the air spring compresses completely and the piston reaches the bottom of the sleeve.
The SlamAir kit fits GMT 800 (1999–2007) and GMT 900 (2007+) Silverado and Sierra trucks. However, fitment depends on your lowering kit type. Contact Air Lift at (800) 248-0892 to confirm fitment for your specific vehicle.
The kit requires a minimum of 5 inches of clearance between the frame and tire when the air spring is fully inflated.
Torque the lower bracket U-bolt to 16 ft/lbs. Torque the upper nylon nut to 4 ft/lbs. Do not overtighten.
No. The kit does not alter GVWR or payload. You must not exceed the maximum load listed in your vehicle's owner's manual.
Check air pressure weekly. Maintain normal ride height and never exceed 100 PSI. When increasing load, adjust pressure to maintain ride height. Perform a 30-day or 500-mile inspection for rubbing or loose fasteners.
A 2–4 PSI loss after initial installation is normal. If loss exceeds 5 PSI, there is a leak. Perform a leak test by inflating to 30 PSI and spraying all connections and inflation valves with a soap/water solution (1/5 dish soap, 4/5 water). Look for bubbles to identify the leak location. Check the air line connections, swivel fitting threads, valve core, and air line for holes, kinks, or pinches. If the leak persists after troubleshooting, call Air Lift at (800) 248-0892.
1. Deflate the spring and remove the air line by pulling the collar against the fitting and pulling firmly. 2. Trim 1 inch off the end of the air line with a clean, square cut. 3. Reinsert the air line into the push-to-connect fitting. If the leak persists, tighten the swivel fitting another 1/2 turn. If it still leaks, deflate the spring, remove the fitting, re-coat the threads with thread sealant, and reinstall by hand tightening as much as possible, then use a wrench for an additional two turns.
1. Check the valve core by tightening it with a valve core tool. 2. Check the air line connection by removing the air line from the barbed fitting. Do not cut the air line completely off, as this will nick the barb and render the fitting useless. If the leak persists, call Air Lift at (800) 248-0892.
Inspect the air line for pinches caused by tight tie straps or kinks and folds in the line. Loosen or replace the tie strap and reroute the air line as needed. Ensure at least 6 inches of clearance from heat sources (exhaust, muffler, catalytic converter) and at least 2 inches of slack for movement.
The vehicle is not level. Raise the air pressure to correct this problem and level the vehicle. If loads such as water, fuel, or appliances are causing the vehicle to be heavier on one side, it may be necessary to maintain different pressures on each side. As much as a 50 PSI difference is not uncommon.
A rough and harsh ride may be due to either too much pressure or not enough. Try different pressures to determine the best ride comfort. Start with the vehicle level or slightly above. When in doubt, always add air. Adjust pressure up and down to find the best ride.
These are stability issues that should be the priority for safety. Tuning out these problems usually requires an increase in pressure. Raise the air pressure to improve roll control, reduce bounce, prevent dive during braking, and eliminate sponginess. Adjust pressure up and down to find the best stability.
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