6. 2010 Chevrolet Colorado V8
Yes, you read it right, for a short period the Colorado V8 was a production vehicle. Most mid-size pickup truck buyers would like the option to have a V8 engine. But Colorado was only offered in this configuration for a very short amount of time. What made the V8 one of the least reliable trucks is that it was taken out of the larger Silverado. There was not a whole lot of engineering that went into this feat and thus Colorado with the V8 had a lot of reliability problems because the truck just wasn’t ready for this kind of challenge.
Take into account the fact that oil pump failures are all too common on these trucks and you have an expensive money pit. Still, it was pretty cool that a Chevy Colorado of all things came with a V8 configuration.