TrailBlazer 4WD L6-4.2L VIN S (2002)
Heater Hose: Service and Repair
Heater Hose Replacement - Inlet
Trailblazer, Envoy, and Bravada
TOOLS REQUIRED
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J 43181 Heater Line Quick Connect Release Tool
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J 38185 Hose Clamp Pliers
REMOVAL PROCEDURE
1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
2. Remove the coolant recovery reservoir.
3. Using the J 43181 disconnect the inlet heater hose (2) from the heater core inlet tube.
3.1.
Install the J 43181 to the quick connect on the outlet heater core hose (2).
3.2.
Close the tool around the inlet heater core hose.
3.3.
Firmly pull the tool into the quick connect end of the heater hose.
3.4.
Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the hose from the heater core.
4. Reposition the hose clamp at the engine outlet using J 38185.
5. Remove the heater inlet hose (4) from the the engine block.
6. Remove the nut retaining the coolant bypass valve to the cowl.
7. Remove the heater inlet hose.
INSTALLATION PROCEDURE
1. Apply coolant to the end of the heater Inlet hoses.
