The 3.0-liter Duramax turbodiesel I-6 is the standard ... Why they weren’t offered previously, when Colorado ZR2 had rock rails standard from launch, is a mystery (and one that cost us thousands ...

Colorado ZR2 competes with full-sized trucks ... but the benefits include much larger engine options - either a 3.0-liter Duramax turbo-diesel or 6.2-liter V-8 - a bed with best-in-class cargo ...

This year, we gladly parked the Squarebody and instead made a few additional trips to our mountain property in the Colorado ZR2 to haul wood. See All 12 Photos Driving to the firewood plot is ...

Since there was rain in the weather forecast the same week I had a Colorado to test, there was only one thing to do: play in whatever mud the weather created. Powering the ZR2 is the same engine ...