Question about 1999 Chevrolet Silverado 1500

1 Answer

Heater core inlet snapped off in hose.

Called chevy and they sell the inlet and outlet but they couldnt tell me how to install. The remainder of inlet rotates freely in the firewall

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  • Richard Scordino May 11, 2010

    Haven't tried to change one yet but the ones I've seen appear to be a "heat shrink" setup. you may be able to cut the part off with an exacto knife or something similar, just be careful not to gouge the inside pipe to the core.

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Nope you need a tool to do it. It's a pain in the rear. It's a 3/4" quick disconnect. Do not try and cut it off. you will break your heater core!!! You can find the tool at most places.

Posted on Jun 19, 2009

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How to replace the heater core to a chevy astro 2003


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Diagram on how to replace heater core in 99 expedition


Removal & Installation 1997-2002 To Remove:
NOTE: Heater core must be vacuum leak tested before it is remove from vehicle if a heater core leak is suspected.
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  2. Remove instrument panel.
  3. For 5.4L (4V), if quipped, remove junction splash shield.
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ford-10-00-3098.gif

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4.for 5.4 (4v) if equiped, disconnect starter relay cable9ad8eea.gif
  1. For 5.4L (4V), if quipped, remove junction block bracket.
  2. Clamp inlet and outlet heater hoses.
  3. Disconnect heater hose from heater core by gently pressing it toward heater core.
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  6. Remove 13 plenum chamber top screws.
  7. Remove blend door assembly from case.
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NOTE: If needed, clean and lubricate coolant hoses with plain water.

0f0dfb5.gif
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  2. Install blend door assembly to case.
  3. Install 13 plenum chamber top screws.
  4. Connect vacuum line.
  5. Install A/C plenum demister adapter.
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  9. For 5.4L (4V), if quipped, connect starter relay cable.
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