Chevrolet Colorado GMC Canyon 2004 thru 2012 - Haynes Automotive Repair Manuals Author:John H Haynes Haynes manuals are written specifically for the do-it-yourselfer, yet are complete enough to be used by professional mechanics. Since 1960 Haynes has produced manuals written from hands-on experience based on a vehicle teardown with hundreds of photos and illustrations, making Haynes the world leader in automotive repair information.