Genuine GMC Envoy Rocker Arm

The Rocker Arm in GMC Envoy vehicles plays an important role of the valvetrain system, where the rocker arm Transmit motion from the pushrod to the intake as well as the exhaust valves. These are usually made from stamped steel or aluminum and are designed to translate the up-and-down movement of the push rods to the requisite downward force to lifts the valves. High speed engines are normally made from aluminum due to its light weight whereas cast iron or forged carbon steel is used in diesel engines. Derivative products of rocker arms include roller rockers that use needle bearings at contact points; they undergo less friction or wear than other models. The rocker ratio that currently stand at 1.5:1 to 1.8:1 enables twice the camshaft lift to occur hence enhancing performance. Earlier, ratios such as 1:1 were relatively prevalent up to the 1950s. Newly designed fulcrum bearings are also used in high RPM engines to withstand stress and thus have longer life thereby increasing on the functionality of the rocker arm.

Each OEM GMC Envoy Rocker Arm we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.