GM 52482185
Heater Core

Replacing the Heater Core begins with draining the cooling system. The hose clamp pliers (J 38185) enables clamp release after which heater hoses detach from the Heater Core. Start by removing the left and right side sound insulators while keeping track that the right side screw will stay outside. First detach the air distributor duct screws then remove the duct followed by Heater Core heat shield screws before removing the heat shield. First dismantle the Heater Core screws and cover before uninstalling both the retaining screw and strap which holds the core in position then finally separate the core from its mounting bracket. Place the new Heater Core into the hvac module then lock it in position with attaching straps and screws by tightening them to 1.4 n.m (12 lb in). Place the Heater Core cover back into position making sure the dashboard seals sit correctly then tighten all screws to 1.4 n.m (12 lb in). Attach the Heater Core heat shield followed by its screws and maintain a torque of 1.4 n.m (12 lb in). Screw the left side angle bracket of the air distributor duct then tighten to 1.4 n.m (12 lb in). To complete the operation attach the heater hoses with hose clamp pliers (J 38185) to their clamps then replace the fuel injector sight shield while filling the cooling system.

The procedure to change the Heater Core into rpo do7 begins by emptying the cooling system fluid. Before commencing the Heater Core heater repair one must remove the sight shield through manual intervention while the spring hose clamp pliers (J 38185) must be employed for the removal of heater hose clamps and heating core hoses. Subsequently detach first the left and then the right side sound insulators followed by the auxiliary air distribution duct adapter. The right side screw of the air distributor duct does not need replacement as you take out the screws (1,2). Start by removing the air distributor duct before unfastening all heat shield screws from the core heater and the shield. After that detach the screws securing the Heater Core cover and remove it. First disconnect the retaining screw and strap attached to the Heater Core followed by its removal. Insert the new Heater Core into the hvac module through the attaching straps and screws which should be tightened to 1.4 n.m (12 lb in). First position the front dash seals correctly before tightening the Heater Core cover screws to 1.4 n.m (12 lb in). Following that install the Heater Core heat shield by tightening screws as per the specification of 1.4 n.m (12 lb in). The left screw should be installed through the air distributor duct at its proper tab positioning before tightening to the specified torque of 1.4 n.m (12 lb in). Continue by installing the auxiliary air distribution duct adapter and then proceed with the left and right side sound insulators. The spring hose clamp pliers (J 38185) should be used to reattach heater hoses and clamps before reinstalling the fuel injector sight shield. Finally, fill the cooling system.

Reattach the air distributor duct, ensuring the left side screw is properly seated and tightened to 1.4 N.m (12 lb in).

Reinstall the heater core heat shield and its screws, also tightened to 1.4 N.m (12 lb in).

Reinstall the left and right side sound insulators, attach the heater hoses and clamps using the Spring Hose Clamp Pliers (J 38185), and replace the fuel injector sight shield before filling the cooling system.

Reinstall the left and right side sound insulators, the heater hoses and clamps using the Hose Clamp Pliers (J 38185), the fuel injector sight shield, and fill the cooling system.

Remove the fuel injector sight shield.

Use the Hose Clamp Pliers (J 38185) to remove the heater hose clamps and detach the heater hoses.