OEM 2004 Buick LeSabre Heater Core

2004 Buick LeSabre Parts Questions & Experts Answers

• Q: How to replace the heater core with RPO Code DO7 on 2004 Buick LeSabre?

  A: The repair process for Heater Core replacement with rpo code do7 begins with draining the cooling system while taking off the fuel injector sight shield. The hose clamp pliers (J 38185) should be used to detach the heater hoses from the Heater Core through the removal of their clamps. Uninstall the left and right side sound insulators then separate the auxiliary air distribution duct adapter from the air distributor duct screws (1,2) with the exception of skipping right-side screw reinstallation. Starting by taking out the air distributor duct alongside its heat shield screws and the Heater Core heat shield itself. Extending your work with a screwdriver begins by loosening screws from the Heater Core cover and then removing that cover before proceeding with screw and strap removal from the Heater Core which frees up the core for removal. Secure the new Heater Core in the hvac module by attaching its straps and screws and tighten them to 1.4 n.m (12 lb in). The Heater Core cover must be installed with proper seal positioning at dash front while tightening its screws to 1.4 n.m (12 lb in). First slip in the Heater Core heat shield after screwing it down to 1.4 n.m (12 lb in). You should next put on the air distributor duct and fit the left side screw properly before tightening it to 1.4 n.m (12 lb in). You should finish your work by using hose clamp pliers (J 38185) on the heater hoses and their clamps while also reinstalling the auxiliary air distribution duct adapter, left and right side sound insulators and filling the cooling system.