If you're looking for the high beam on your Chevy Colorado, it's likely in the same place as most other cars - on the left side of the steering column. There's a small knob that you can turn to activate the high beams, and they should come on automatically when you do so. If they don't, it's possible that there's a problem with the bulbs or with the wiring. In any case, it's best to take your car to a mechanic or dealership to have it checked out.