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Your hard-working and easy-on-the-eyes GMC Sierra is truly the rock star of the 4WD truck world. Maintain its top-notch performance by scheduling routine check-ups, including maintenance of its emissions controls. A GMC Sierra EGR valve replacement is available at AutoZone to ensure that your big rig's engine performs well for the long haul.

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Your truck's EGR valve is a critical part of its emissions control system. This system functions by recirculating some of the exhaust formed by combustion and actually running it through the combustion process a second time. In this process, fuel is burned more cleanly and the amount of greenhouse gases released into the atmosphere is reduced. Over time, your EGR valve for GMC Sierra becomes clogged with carbon and must be replaced to maintain optimal engine functionality. Order Sierra EGR valves online at AutoZone and enjoy home shipping.

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