This applies to the full size trucks, not sure about the Colorados. You can lift the front of the truck by cranking the torsion bars, but only safely about 2". Any more than that, your upper control arms will be hitting the bumpstops and your shocks may not be long enough. To make the adjustment, locate the torsion bar and follow it back to just about under the seats where it will enter into a crossmember between the frame rails. You will see a bolt with the head pointing down just below the end of the torsion bar, this is the adjusting bolt. Turn it clock wise to raise the truck. 1 full turn equal 1/4 inch of lift. After any adjustments from stock you must have the truck re-aligned. Again this is how to do it on a full size truck, not sure about yours.
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