GM Genuine Parts 20904439 Original Equipment Trailer Brake Continue Relay Assembly，Replaces 20904439 - Compatible with Chevy, GMC and Cadillac Vehicles electronics_update_2023 The new improved lithium polymer

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GM Genuine Parts 20904439 Original Equipment Trailer Brake Continue Relay Assembly，Replaces 20904439 - Compatible with Chevy, GMC and Cadillac Vehicles electronics_update_2023 The new improved lithium polymerGM Genuine Parts 20904439 Original Equipment Trailer Brake Continue Relay AssemblyReplaces 20904439 Compatible with Chevy, GMC and Cadillac Vehicles Product Features 20904439 Brake Control Relay for GM recommended replacement part for your GM vehicles original factory component,Offering the quality, reliability, and durability of GM OE,Manufactured with GM Original Equipment specification for fit, form, and function REPLACE PART # Replace For 2 4 27