2005 Chevrolet Colorado Z71 LS 5 Cyl 3.5L
check engine light is on
I've changed spark plugs, Both oxygen sensors. It's seems to be idling high.
Have the code read either pick up a code reader or try a chain autoparts store sometimes they put the reader on for free. I wouldn't keep changing parts you may have all ready fixed the problem, but codes nee to be cleared after the repair to turn off the engine light.