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Dan, Technician
Category: Chevy
Satisfied Customers: 23492
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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94 suburban: replace rear heater core

Customer Question

have a 94 suburban the heater core for the rear heat leaked and soaked the rear carpet was out of town at the time so i cut the hoses underneath the floor and bypassed the heater core want to replace heater core now but it looks like to get to heatr core whole airbox assembly will have to be removed this would mean opening up ac system which i would rather not do how do you replace rear heater core?
Submitted: 7 years ago.
Category: Chevy
Expert:  Dan replied 7 years ago.

Here are instructions, let me know if you have questions. Thanks





  1. Engine coolant.
  2. Rear quarter interior trim, as necessary.
  3. Right rear quarter trim panel.
  4. Right rear wheelhouse.
  5. Auxiliary heater hoses from heater core.
  6. Electrical connectors, as necessary.
  7. Drain valve.
  8. Bolts.
  9. Nuts.
  10. Heater module.
  11. Blower motor, if necessary.
  12. Heater case cover.
  13. Heater core.


  1. Heater core.
  2. Heater case cover.
  3. Blower motor, if necessary.
  4. Heater module.
  5. Nuts.
  6. Bolts. Tighten;
    • Bolts to 1.5 Nm (13 in.lbs.)
    • Nuts to 10 Nm (89 in.lbs.)
  1. Drain valve.
  2. Electrical connectors, as necessary.
  3. Auxiliary heater hoses to heater core.
  4. Right rear wheelhouse.
  5. Right rear quarter trim panel.
  6. Rear quarter interior trim, as necessary.
  7. Engine coolant.