<p>Includes: - Secondary Air Injection Relay Connector</p> <p>Fits Models: - GMC Sierra 1500</p> <p>Model Years: - 2014–2018</p> <p>Submodels: - Common trims include SLT, SLE, Denali, WT (Work Truck) - Chassis codes: GMT K2XX - Body styles: Crew Cab, Double Cab, Regular Cab</p> <p>Engine Options: - Common engine sizes include 4.3L V6, 5.3L V8, 6.2L V8 - Engine codes: L83, L86, LV3</p> <p>Description: This Secondary Air Injection Relay Connector is designed specifically for the GMC Sierra 1500 from 2014 to 2018. It ensures proper electrical connection for the secondary air injection system, which helps reduce emissions and improve engine performance.</p> <p>Features: - Direct fit for easy installation - Durable construction for long-lasting performance - Designed to meet or exceed OEM specifications - Ensures reliable operation of the secondary air injection system</p> <p>Part Numbers: - 21211HSYD</p>