I don't about the power, but the rear drum brakes on the Colorados 'stink'. I service some of the local NAPA trucks (2wd 4cyl), and they have been having problems with the rears locking-up when cold. They also sound like they are metal-to-metal, yet they are just glazed. A TSB by GM advised to use a dremel-type tool & cut-off every-other tooth on the auto adjuster. I've never heard of that before!! I'm not sure I would trust them pulling a trailer. Just my 2 cents (keep the change)