* Dual overhead camshafts (DOHC) and four valves per cylinder * Twin counter-rotating balance shafts for operational smoothness * Electronic throttle control * Low - friction, roller - finger follower valvetrain with
hydraulic lash adjusters * Low - maintenance chain - drive for the camshafts * 58X crankshaft positioning * Direct - mount accessories, which reduce or eliminate traditional sources of noise and vibration * Full - circle transmission mount to reduce noise and vibration * GM Oil Life
System, which can reduce the frequency for oil changes *
Innovative cast - in oil filter housing, which eliminates the need to crawl under the vehicle to perform oil changes and eliminates throwaway oil filter cans that retain used oil