Can a 4x4 truck be lowered?
Between all the major truck suspension lowering companies, you can find parts to lower nearly all of the newer domestic 4wd half ton trucks and even a little bit of stuff for some of the heavier trucks. The rear is always the easy end to lower. via
How do I lower my 1 ton truck? (video)
Can you lower a truck with air suspension?
Truck Air Suspension For Towing/Hauling
These air bags are not designed to raise or lower your vehicle as much as air shocks, but can be used to raise your truck bed back up when loaded down. via
Can I lower car with stock suspension?
One popular method for lowering a car that most budget-minded enthusiasts opt for is using lowering springs with the car's OEM (stock) shock absorbers. While this is indeed a very cost-effective way of lowering the car's ride height, it doesn't help much in terms of the car's ride quality. via