2006 Chevy Colorado

Truck has 156,600 miles Engine would stall on me when turning and driving on the highway. Took it to the dealer and the codes were P0300,P0121, and P0106. They Performed a compression test and a back pressure check and found a crack spark #1 Cly. They replaced all spark plugs. Replaced throttle body do to intermittment short inside throttle position sensor. Replace Camshaft actuator for exhaust camshafts position correlation. Last night I was driving home and the truck was stalling and the engine light was flashing. I took it to the dealer and they told #4 cly was misfiring and it was some type of coil.

Thanks, Bill Taylor