Auxiliary Heater Core Replacement (Tahoe/Yukon/Escalade)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Auxiliary Heater Core (Tahoe/Yukon/Escalade)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedure Remove the HVAC module - auxiliary. Refer to Auxiliary HVAC Module Replacement (Tahoe/Yukon/Escalade) or Auxiliary HVAC Module Replacement (Suburban XL) . Disconnect any wiring connectors or harnesses from HVAC module.
1	HVAC Module Gasket
2	Auxiliary HVAC Module Lower Cover Bolt (Qty: 3) NOTE: Refer to Fastener Notice . Tip: Remove any fastener clips that secure cover to module. Tighten: 3 N.m (27 lb in)
3	Auxiliary HVAC Module Lower Cover
4	Separate the HVAC Module Case Tip: Remove any fastener clips that secure cover to module. Tighten: 3 N.m (27 lb in)
5	Auxiliary HVAC Heater Core Tip: Ensure all seals and gaskets are in place upon installation.