Heater core replacement

Tiny
C.COLLIER
  • MEMBER
  • 2008 CHEVROLET SILVERADO
  • 4.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Need a step by step procedure or diagram of bolts to be removed to remove heater core.
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Tuesday, November 20th, 2018 AT 4:21 PM

2 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good evening,

Below are the step by step instructions with the pictures.

Roy

HVAC Module Assembly Replacement

Tools Required

J 43181 Heater Line QC Release Tool

Removal Procedure

1. Drain the engine coolant. Refer to Cooling System Draining and Filling (Vac-N-Fill) Cooling System Draining and Filling (Static Fill).

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2. Using the J 43181 disconnect the inlet heater hose from the heater core.

1. Install the J 43181 to the heater core pipe.
2. Close the tool around the heater core pipe.
3. Firmly pull the tool into the quick connect end of the heater hose.
4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the inlet hose from the heater core.

3. Using the J 43181 disconnect the surge tank outlet hose from the heater core.

1. Install the J 43181 to the heater core pipe.
2. Close the tool around the heater core pipe.
3. Firmly pull the tool into the quick connect end of the heater hose.
4. Firmly grasp the heater hose. Pull the heater hose forward in order to disengage the surge tank outlet hose from the heater core.

4. Remove the upper intake manifold sight shield.
5. Remove the battery.
6. Remove the accumulator.
7. Remove the instrument panel to the service position.

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8. Remove the nuts (2) from the HVAC module (3).
9. Remove the bolts (1) from the HVAC module (3).
10. Remove the HVAC module (3).
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Tuesday, November 20th, 2018 AT 4:55 PM
Tiny
KEN
  • ADMIN
Hello,

Here are the rest of the diagrams to help you get the job done plus you will need to vacuum down the air conditioner:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Tuesday, November 20th, 2018 AT 5:37 PM

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