5/8" and 3/4"
The Chevy heater hose removal tool is a plastic piece that clamps around the hose. The tool slides into the fitting to release the hose.
removal of heater hose from engine to fire wall
Cool the heater hose and then gently take it off
Generally, the upper heater hose leads to the water pump.
The heater inlet hose is on the firewall. On the 2002 Silverado it is close to the bottom of the firewall on the passenger side.
to engine and rad
That hose goes to your heater core, follow the hose to passenger side of the firewall.
In the engine bay, remove the inlet and outlet hose from the firewall for the heater core, get a heater hose connector that matches the hose sizes (fair warning they are 2 different sizes but i cant remember) and just join the 2 hoses together with the connector and some clamps. you wont have heat or defrost by doing this though.
Heater core? Inlet or outlet hose fitting at heater core?
www.oehq.com
On a 1989 Chevy Celebrity the heater hose leaves the water pump via a hose barb then runs along the top of the passenger side frame rail and then into the heater core. The heater core is in the firewall below the blower fan on the passenger side of the car. The return hose leaves the heater core and runs along the firewall then to the water outlet below the thermostat.
one large hose from bottom of radiator to side of water pump. other large hose from thermostat housing to top of radiator. one heater hose from water pump to heater core, I think this one has a Y in it if there is a rear heater other heater hose from heater core to somewhere on top the engine. If there is a rear heater, its return hose goes to a fitting on the radiator.