Browse GMC Sierra 3500 Pickup O2 sensor socket & GMC Sierra 3500 Pickup Lambda sensor socket. Explore GMC Sierra 3500 Pickup O2 sensor cleaner. Maintaining the O2 sensors in your GMC Sierra 3500 Pickup is crucial for optimal performance and fuel efficiency. Regularly checking for signs of wear, such as a check engine light or poor gas mileage, can alert you to the need for replacement. Extend their lifespan by keeping your engine tuned and avoiding the use of leaded fuels. When selecting a new sensor, opt for high-quality options designed for your specific model, considering features like heated sensors for faster response or wideband sensors for advanced functionality. Proper installation is key, so ensure a secure fit and correct wiring to prevent future issues, enhancing your vehicle's functionality and maintaining its resale value.