Yukon Denali AWD V8-6.2L (2007)
Heater Hose: Customer Interest
A/C - Coolant Leak at Rear of Vehicle
Bulletin No.: 07-01-37-002
Date: March 30, 2007
Coolant Leak at Rear of Vehicle (Install Auxiliary Heater Inlet and Outlet Hose Quick Connector Service Kit)
2005-2007 Cadillac Escalade, Escalade ESV
2005-2007 Chevrolet Suburban, Tahoe
2005-2007 GMC Yukon Models
with Auxiliary Heater (RPO C36)
Some customers may comment on a coolant leak at the rear of the vehicle.
This condition may be due to the auxiliary heater hose quick connection leaking or the retaining clip is broken.
Technicians are to install an auxiliary heater inlet and outlet quick connector service kit instead of replacing the entire auxiliary heater hose line set. The
components of the service kit are shown in the illustration above. The kit consists of an instruction sheet, retaining clip (1), second 0-ring (2), mid-spacer
(3), and first 0-ring (4). Refer to the Auxiliary Heater Inlet and Outlet Hose Connector Retainer and Seal Replacement procedure in SI for more
information on how to install this service kit (Document ID# 1887838).