Envoy 2WD V8-5.3L VIN P (2004)
34.
Install the coolant bypass valve to its original location and secure with a nut.
35.
Connect the other end of the new hose from step 29 to the outlet port of the auxiliary heater pump.
36.
Connect the vacuum hose to the coolant bypass valve.
37.
Connect the coolant bypass valve hose to the auxiliary rear heater line.
38.
Install the heater hose quick connect retainers to the heater core pipes.
39.
Connect the remaining two hoses to the heater core.
40.
Install the new auxiliary heater pump wiring harness to the vehicle.
