Dorman 604-108 Air Door Actuator for Select Chevrolet/Cadillac/Buick/Pontiac Models DIRECT REPLACEMENT: This Dorman air door actuator is specifically engineered to match or exceed the original design and performance of the original air door actuator on select Cadillac Escalade, Chevrolet Avalanche, Chevrolet Silverado, Chevrolet Tahoe, Chevrolet Suburban, GMC Sierra and GMC Yukon vehicles. UPGRADED MATERIALS: Engineered with an upgraded motor and internal circuit board for improved durability and better overall performance. COST SAVINGS: Save time and money by replacing the failed actuator, instead of the entire assembly. QUALITY-TESTED: This part has undergone extensive vehicle try-on and durability testing to ensure year after year of trouble-free service. ENSURE FIT: To make sure this fits your exact vehicle, input your year, make, model and trim into the Amazon Garage. Original Equipment (OE) Numbers: 10308593, 10325404, 10356910, 15142056, 15249473, 15844096, 22754988, 52409974