Replace GMC Sierra 1500 Pickup Catalytic Converter Exhaust Leak & GMC Sierra 1500 Pickup Catalytic Converter Prices. Maintaining the catalytic converter of your GMC Sierra 1500 Pickup is crucial for ensuring optimal performance and longevity. Regular inspections can help catch early signs of wear, such as decreased fuel efficiency and a sluggish engine, signaling it might be time for a replacement. To extend its lifespan, avoid using leaded fuels and ensure the engine is running efficiently to prevent excess carbon buildup. When selecting a new catalytic converter, choose between universal, direct-fit, or high-flow options, each designed to meet specific performance needs and emission requirements. High-quality materials and professional installation are paramount to ensure that your Sierra's emission system remains in top condition, safeguarding both your ride and the environment.