it sayz right on the bar do not adjust. it will make truck ride like crap and affect your alignment too but if u must there is a bolt and cam toward the back of the bar tighten or loosen that bolt make sure u have a tape measure so u can measure from the front fender to ground on both front sides to level it
yes 02-05 have torsion bars 06 and up have coil overs
No, The Silverado 1500 does not have torsion bars it has coil overs and shocks. All 4wd silverados have them and the 2500HD 2wd also does.
No.
To lift the front of a Ram you have to replace the springs, or add spring spacers.
YES it does.
on the rear cross member where the torsion bars mount there is an adjustment screw
torsion bars only exist on 4WD dakotas....2WD have coils
If it 4x4 you need to crank the torsion bars so no rubbing happens but you can easily put 285/70R17
Two wheel drive trucks have torsion bars to help adjust the ride of the vehicle. They can be turned up or down based on the vehicle's load.
There is a bolt near rear of torsion bar (the end closer to rear bumper) which will increase or decrease the tension on torsion bar when you adjust bolt.
the is a bolt right behind the transmisson that you turn
as the rear is torsion it is not straight forward. the torsion bars have to be removed one side at a time, with the torsion bar out simply adjust hub the required amount and replace torsion bar. then do the other side. this can be hard as the bars can be difficult to remove. best left to professional should cost between £60-£100