604-106, 89018365, 52402588 HVAC Blend Door Actuator Replacement for , , GMC, Silverado Features: Compatible with part numbers: 89018365, 604-106, 52402588, 16163982, 52402598, 52402612. Direct replacement for the factory blend door actuator on your vehicle. Recalibration of the HVAC system is required after installation. Replaces actuators in , GMC, Cadillac, Buick, Pontiac, and Hummer models including Silverado 1500, 2500 HD, GMC Sierra 1500, 2500 HD (1999-2013), Tahoe, Suburban 1500, 2500, GMC Yukon, Yukon XL, Cadillac Escalade (2000-2014), Buick Century, Pontiac Grand Prix, Bravada, Hummer H2 (2003-2009) and other compatible vehicles. Refer to specifications for full fitment details. Easy installation on both driver and passenger side for a secure fit. HVAC system recalibration is recommended after installation. Tested for performance and noise to ensure smooth motor operation without abnormal sounds or blockages. Equipped with a reinforced internal circuit board designed to resist heat, corrosion, and vibration for improved durability. Specifications: Replacement part numbers: 89018365, 604-106, 52402588, 16163982, 52402598, 52402612 Fitment: Corvette 1997-2004 Blazer 1998-2002 S10 1998-2002 Silverado 1500, 1500 HD, 2500, 2500 HD 1999-2013 Silverado 3500 2001-2006 Silverado 3500 HD 2007-2014 Silverado 1500 HD, 2500 HD, 3500 Classic 2007 Tahoe 2000-2014 Suburban 1500, 2500 2000-2014 Trailblazer and EXT 2002-2003 GMC Jimmy 1998-2001 GMC Sonoma 1998-2002 GMC Sierra 1500, 1500 HD, 2500, 2500 HD 1999-2013 GMC Sierra 3500 2001-2006 GMC Sierra 3500 HD 2007-2014 GMC Sierra 1500 HD, 2500 HD, 3500 Classic 2007 GMC Yukon 2000-2014 GMC Yukon XL 2000-2014 GMC Envoy and XL 2002-2003 Cadillac Fleetwood 1994-1996 Cadillac Seville 1998-2004 Cadillac Escalade 2000-2014 Cadillac Escalade ESV and EXT 2003-2014 Package Included: 1 x Blend Door Actuator