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In Chevrolet Equinox vehicles, the Rocker Arm is used to play a significant role in the engine's valvetrain system, whereby it connects the pushrod to the intake and exhaust valves. Usually, made from stamped steel or aluminum material, the Rocker Arm plays a role in translating the movement of the pushrod in the vertical direction to the down ward movement required to open the valves. For high revolutions per minute operations, aluminum is used due to its weight reducing benefits while for durablity GMC employs cast iron or forged carbon steel especially in diesel engines. Rocker Arms in Chevrolet Equinox may vary and may comprise of normal and roller Rocker Arms. Roller rockers are favoured with needle bearings to lessen wear and tear, steel better than the traditional metal contact counterparts. The rocker ratio which falls between 1.5:1 and 1.8:1 in most of the modern engines, acts as a multiplier on camshaft lift thus improving efficiencies. In high RPM Chevrolet Equinox engines, improved fulcrum bearings are also used to deal with stress as well as enhance the longevity.