604-106, 89018365, 52402588 HVAC Blend Door Actuator Replacement for Chevrolet, Chevy, 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. Proper installation requires recalibration of the HVAC system. Designed as a replacement for select Chevrolet, GMC, Cadillac, Buick, and Pontiac models including Chevy Silverado 1500, 2500 HD, GMC Sierra 1500, 2500 HD (1999–2013), Chevy Tahoe, Suburban 1500, 2500, GMC Yukon, Yukon XL, Cadillac Escalade (2000–2014), Century, Pontiac Grand Prix, Bravada, Hummer H2 (2003–2009), and other compatible vehicles. Refer to vehicle fitment details below for more information. Easy installation on both driver and passenger sides for correct fitment. Recalibration of the HVAC system is required after installation. Tested for performance and noise to ensure smooth motor operation without clogging or abnormal sounds. Equipped with a reinforced internal circuit board designed to resist heat, corrosion, and vibration for improved durability. Specification: Replaces part numbers: 89018365, 604-106, 52402588, 16163982, 52402598, 52402612 FITS THE FOLLOWING VEHICLES: Chevy Corvette 1997–2004 Chevy Blazer 1998–2002 Chevy S10 1998–2002 Chevy Silverado 1500, 1500 HD, 2500, 2500 HD 1999–2013 Chevy Silverado 3500 2001–2006 Chevy Silverado 3500 HD 2007–2014 Chevy Silverado 1500 HD, 2500 HD, 3500 Classic 2007 Chevy Tahoe 2000–2014 Chevy Suburban 1500, 2500 2000–2014 Chevy Trailblazer and EXT model 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 model 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 Note: 1. Please allow 1–3 mm error due to manual measurement and 1–3g weight variation. Ensure you are comfortable with this before ordering. 2. Due to lighting conditions during photography and differences in monitor displays, the actual product color may vary slightly from images. Confirm acceptance before placing an order.