Replace GMC Envoy Exhaust Gas Recirculation Valve Replacement Cost & GMC Envoy EGR. Browse GMC Envoy Exhaust Gas Recirculation Sensor. Maintaining the EGR (Exhaust Gas Recirculation) valve of your GMC Envoy is crucial for optimal performance and fuel efficiency. Regular cleaning can prevent carbon build-up, a common cause of EGR failure, while noticing rough idling or a decrease in fuel economy often signals the need for replacement. When selecting a new EGR valve, ensure compatibility with your Envoy model; options include basic vacuum-operated valves and more sophisticated electronic variants with feedback sensors. Quality materials like high-grade metals can extend the lifespan of your EGR, and while installation is manageable for the DIY enthusiast, professional fitting is recommended to guarantee function and longevity. Enhance your Envoy's emission system today with our premium EGR valves, designed for reliability and seamless integration.