Heater Inlet/Outlet Hoses: Removal

Disconnect negative battery cable.
Drain coolant. See BLEEDING .
Position approved coolant container under vehicle below the heater hose connections to catch any coolant that may be trapped in the lines.
If only one hose is being serviced, open hose assembly clamp and remove. See Fig 1 .

Fig 1: Removing Heater Hose Clamp Assembly
Courtesy of GENERAL MOTORS CORP.
Remove heater inlet hose from heater core pipe by depressing quick connect collar tab, located at 6 o'clock. See Fig 2 . And pulling collar (black) toward front of vehicle and then pull quick connect off of heater core pipe. See Fig 3 .

Fig 2: Identifying Quick Connect Collar Tab Location
Courtesy of GENERAL MOTORS CORP.

Fig 3: Removing Heater Inlet Hose From Heater Core
Courtesy of GENERAL MOTORS CORP.
Remove heater outlet hose from heater core pipe by depressing quick connect collar tab, located at 6 o'clock. See Fig 2 . Pulling collar (white) toward front of vehicle, and then pull quick connect off of heater core pipe. See Fig 4 .
Remove heater core inlet hose to engine housing clamp and remove hose. See Fig 5 .
Remove heater core outlet to thermostat housing clamp and remove hose. See Fig 5 .

Fig 4: Removing Heater Outlet Hose From Heater Core

Courtesy of GENERAL MOTORS CORP.

Fig 5: Removing Heater Inlet Hose From Engine

Courtesy of GENERAL MOTORS CORP.

Fig 6: Removing Heater Outlet Hose From Engine

Courtesy of GENERAL MOTORS CORP.