2015-2020 Chevy Colorado / GMC Canyon and ZR2. Front 1.25" Leveling Kit. PN RTX99100. The RTX Off Road Chevy Colorado/GMC Canyon/ZR2 1.25" inch Leveling Kit will lift the front of your 2015-UP Chevy Colorado and GMC Canyon pickup to allow for larger wheels and tires. Provides a leveled stance. CNC Machined from billet aluminum and designed to install on the bottom of the factory strut. No cutting bolts. Easy to install in just an hour. Allows for 31" tall tires.