2005 Chevy Colorado P0300 check engine code

Engine Performance problem
2005 Chevy Colorado Four Wheel Drive Automatic 99000 miles

check engine light code p0300 comes on on and off, parts guy said it may be the coils have already replaced plugs and boots, but have read some info on the net today saying it could be in the engine valve springs head etc, and that this is a common problem on this truck, is there a recall on this? Or any idea's?