Detect oxygen content in the exhaust gases to optimize emissions and fuel economy , GM-recommended replacement part for your GM vehicle’s original factory component , Offering the quality, reliability, and durability of GM OE , Manufactured to GM OE specification for fit, form, and function , Connector Gender: Female , Fits: Chevrolet- 2002: Avalanche 1500, Tahoe, Suburban 1500, 1999-2002: Silverado 1500, 1999-2000: Silverado 2500. Cadillac- 2002 Escalade. GMC- 2002 Yukon/ Yukon XL 1500, 1999-2002: Sierra 1500, 1999-2000: Sierra 2500.