Question about 1999 Chevrolet Malibu

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Where is the heater core at on a 1999 chevy malibu with the 3100 in it

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If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
where is the heater core at on a 1999 chevy malibu - f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Posted on Jan 11, 2011

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SOURCE: How to change a heater core in a 1999 Chevy Malibu?

Before starting this job I would get a repair manual. This is not a easy job, 6+ hours for an experienced tech with all of the right tools. And you may have to discharge and recharge the AC system.

Posted on Jan 30, 2009

  • 157 Answers

SOURCE: need location of heater core

Usually under the passenger side dash and a pain to change.

Posted on Jan 05, 2011

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