2006 chevy colorado won't start,let sit few minutes then it will start

Your vehicle has electronic throttle control , position sensors in the accelerator pedal ,position sensors in the throttle body . A REDUCED POWER message is suppose to warn the drive so it takes it to a quaified repair shop ,DEALER !
Cleaned MAF & throttle body & changed crank position sensor. Not just replace parts blindly .
Electronic Throttle Control System Diagnosis Diagnostic Quick Tips Snap on...
Electronic Throttle Control This video shows Toyota , your's works the same .
Over time these position sensors wear .

How often is this happening? Did you hear the alarm go off? Do you have an aftermarket radio?

does the unit crank after it fails? I would check all of my battery connections you may have a loose ground either at the battery or at the engine. You may also have a bad starter relay located un the fuse panel under the hood

Sounds like a bad battery. A number of chain auto parts stores will check it and your charging system free. Before that, if your battery has removable caps, check the water level, if it's down, fill to the bottom of the fill rings and charge the battery, if you have a battery hydrometer, all the cells should have about the same charge level, if one or more show a lot lower than the others, battery is probably bad. Hope this helps.

When you turn your key forward (pre-ignition) can you hear your fuel pump engage and have you checked your inline filters?

Your Main Battery is Flat, get a jump start if its safe or remove the battery and hook it up to a charger. Maybe you left your lights on, or your alternator isnt charging the battery properly when your driving around. Sometimes this can be the bushes located in the alternator.

I have the same problem few days ago, and still didn't find any solution. Can any one please help?????5

After for setting for so long it is possible the pump picked something up and it clogged the injector.

You can check Edmunds.com for possible recalls. I suspect bad or sticky oil pressure switch. Reason; Oil pressure switch is also a safety that controls your fuel pump. When oil pressure drops like in an accident or rollover, it cuts electric fuel pump off. Have you had it into a dealer for diagnosis??? Another note: when was last "healthy" tune up? Plugs, wires, All fluids & filters including fuel filter? You didn't mention mileage.

2005 Colorado 4x4 stick shift – I had the same thing happen and it had to do with the passlock system – it will keep your truck from starting for approximately 10 minutes, yes you will have to wait and let it sit- if you try to start it will just turn over forever. On my truck the solution was to change my starting procedure, I now keep the truck in neutral-turn the key all the way for a few seconds and then push in the clutch- it starts every time. If you have an automatic I don’t know..