Envoy 2WD V8-5.3L VIN M (2005)
16.
Remove the nut and bolt securing the coolant recovery reservoir.
17.
Remove the coolant recovery reservoir with the accumulator attached.
18.
Remove the evaporator tube nut at the evaporator.
19.
Remove the evaporator tube from the evaporator
20.
Using the J 43181, disconnect the heater hoses from the core.
20.1. Install the J 43181 to the heater core hose.
20.2. Close the tool around the heater core hose.
20.3. Firmly pull the tool into the quick connect end of the heater hose.
20.4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the hose from the heater core.
21.
Disconnect the coolant bypass valve hose from the auxiliary rear heater line.
22.
Disconnect the coolant bypass valve hose from the engine.
23.
Disconnect the electrical connector from the coolant bypass valve. This connector will no longer be used. Tape off with electrical tape.
24.
Disconnect the vacuum hose from the coolant bypass valve.
25.
Remove the nut retaining the coolant bypass valve to the cowl and remove the coolant bypass valve with hoses attached.
26.
Remove the heater hose quick connect retainers from the heater core pipes.
27.
Remove the four nuts and the HVAC plate from the dash panel.
28.
Attach the new auxiliary heater pump to the new bracket using the supplied retainers as shown. Note the position of the pump on the bracket.
