2015 Chevrolet Colorado, GMC Canyon 3.6L Makes 305 HP by CLittle | Jun 18, 2014 | News GM’s 2.5-liter I-4 and 3.6-liter V-6 feature dual-overhead camshafts with variable valve timing, direct injection, jet-spray piston cooling, aluminum blocks, and forged-steel crankshafts. GM is getting back into the midsize …read more Share this:FacebookTwitterPinterest