Removal Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Remove the appropriate rear bench seats. Rear Bench Seat Removal and Installation (With Bench Seat) , or Rear Bench Seat Removal and Installation (With Split Bench)
Body Rear Corner Garnish Molding - Left Side - Remove - Body Rear Corner Garnish Molding Replacement
Body Rear Corner Trim Panel - Left Side - Remove - Body Rear Corner Trim Panel Replacement - Left Side
Courtesy of GENERAL MOTORS COMPANY

Auxiliary Air Conditioning Air Outlet Duct (2) - Remove - Auxiliary Air Conditioning Air Outlet Duct Replacement (Top Hat Cargo Van C69) , or Auxiliary Air Conditioning Air Outlet Duct Replacement (Rear Pillar Passenger Van)
Courtesy of GENERAL MOTORS COMPANY

Auxiliary Heater and Air Conditioning Blower Motor Relay Bracket Bolt (1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Auxiliary Heater and Air Conditioning Blower Motor Relay Bracket (1) - Remove
Disconnect the electrical connectors.
Courtesy of GENERAL MOTORS COMPANY

Note the routing of the auxiliary heater wiring harness prior to removal.
Auxiliary Air Conditioning Wiring Harness (1) - Remove