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Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
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Experience:  Have owned a repair shop for 25 yrs.
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2001 chevy: 1500 4X4 with a/c 5.3L..heater core leaks

Customer Question

2001 chevy 1500 4X4 with a/c 5.3L pickup heater core leaks need step by step instruction. after i open door of truck what do i do next what comes off first and how do i take it off and so on ,so on,so on
Submitted: 4 years ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 4 years ago.

hi

this should help you..please print

thanks

 

Avalanche, Sierra, Silverado, C&K Series, 1999-2005

Removal & Installation

  • FRONT

 

  1. Disconnect the negative battery cable.
  2. Drain the engine cooling system into a clean container for reuse.
  3. Disconnect the heater hoses from the heater core.
  4. Remove the instrument panel storage compartment.
  5. Disconnect the electrical connectors, as necessary, that may be in the way.
  6. Remove the center floor air distribution duct.
  7. Remove the hinge pillar trim kick panels.
  8. Remove the blower motor cover screws and the cover.
  9. Remove the blower motor screws and the blower motor.
  10. Remove the steering wheel and the steering column (standard & tilt).
  11. Remove the instrument panel fasteners and pull the instrument panel back far enough to gain access to the heater assembly.
  12. While holding the heater assembly against the firewall, remove the screw located on the interior side near the evaporator pipe, if equipped.
  13. In the engine compartment, remove the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts.
    NOTE Removal of the heater assembly may require the help of an assistant.
  14. Remove the 7 heater cover-to-heater assembly screws and the cover.
  15. Remove the heater core from the heater assembly.

FIG : View of the front heater assembly

image

FIG : Location of the front heater assembly-to-chassis fasteners

image

To install:

  1. Install the heater core to the heater assembly.
  2. Install the heater cover and the 7 heater cover-to-heater assembly screws.
    NOTE Installation of the heater assembly may require the help of an assistant.
  3. In the engine compartment, install the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts. Torque the screws to 17 inch lbs. (1.9 Nm) and the nuts to 25 inch lbs. (2.8 Nm).
  4. While holding the heater assembly against the firewall, install the screw located on the interior side near the evaporator pipe, if equipped. Torque the screw to 97 inch lbs. (11 Nm).
  5. Install the instrument panel and the instrument panel fasteners.
  6. Install the steering column (standard & tilt) and the steering wheel.
  7. Install the blower motor and the blower motor screws.
  8. Install the blower motor the cover and the cover screws.
  9. Install the hinge pillar trim kick panels.
  10. Install the center floor air distribution duct.
  11. Connect the electrical connectors that were disconnected.
  12. Install the instrument panel storage compartment.
  13. Disconnect the heater hoses to the heater core.
  14. Refill the engine cooling system.
  15. Connect the negative battery cable.
  16. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.



NOTE This procedure requires the use of J 43181 Quick Connect Connector Removal Tool or equivalent.

  1. Drain the engine cooling system into a clean container for reuse.
  2. Remove or disconnect the following:

    Negative battery cable Air conditioning refrigerant, using the proper equipment
  3. Using the J 43181 or equivalent quick connect tool, disconnect the inlet heater hose from the heater core.
    1. Install the tool 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.

  4. Disconnect the surge tank outlet hose from the heater core using tool J 43181.
  5. Remove or disconnect the following:

    Accumulator Instrument panel carrier HVAC module drain hose Electrical harnesses and the ground connections from the HVAC module Retaining nuts and bolts and HVAC module Screws from the heater core cover Cover from the HVAC module Heater core cowl gasket from the heater core Heater core from the HVAC module assembly
  6. FIG : Remove the nuts (4), bolts (3), then remove the HVAC module (2) from the vehicle (1)-Avalanche

    image

  7. To install:

    1. Install or connect the following

      Heater core to the HVAC module Heater core cowl gasket HVAC module cover and secure with the retaining screws HVAC module into position. Torque the nuts to 90 inch lbs. (8 Nm) and the bolts to 35 inch lbs. (4 Nm). Electrical connectors to the module Instrument panel carrier Accumulator Hoses to the heater core. Firmly push the hoses on until you hear an audible -click- to be sure they are properly seated. Negative battery cable.
    2. Refill the engine cooking system. Recharge the A/C system, using the proper methods and equipment.
    3. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

    1. Drain the engine cooling system into a clean container for reuse.
    2. Remove or disconnect the following:

      Negative battery cable Heater hoses from the heater core Temperature control cable from the heater case assembly Disconnect the mode control cable from the heater case assembly Instrument panel carrier to provide access to the heater case assembly Electrical connectors that may interfere with the heater case assembly removal Heater case assembly-to-chassis screws/nuts and the assembly. Place the heater case assembly on a bench. Heater core cover screws Heater core from the heater case
    3. FIG : View of the heater case assembly-Sierra \

      image


    4. FIG : View of the heater core-Sierra \

      image

    5. To install:

      1. Install or connect the following:

        Heater core to the heater case Heater core cover screws and tighten to 14 inch lbs. (1.6 Nm) Heater case assembly and the assembly-to-chassis screws, then, tighten the screws to 35 inch lbs. (4 Nm) and the nuts to 80 inch lbs. (9 Nm) Electrical connectors, as necessary Instrument panel carrier Mode control cable to the heater case assembly Temperature control cable to the heater case assembly Heater hoses to the heater core Negative battery cable.
      2. Refill the engine cooking system.
      3. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

      1. Disconnect the negative battery cable.
      2. Drain the engine cooling system into a clean container for reuse.
      3. Disconnect the heater hoses from the heater core.
      4. Disconnect the temperature control cable from the heater case assembly.
      5. Disconnect the mode control cable from the heater case assembly.
      6. Remove the instrument panel carrier to provide access to the heater case assembly.
      7. Disconnect any electrical connectors that may interfere with the heater case assembly removal.
      8. Remove the heater case assembly-to-chassis screws/nuts and the assembly.
      9. Place the heater case assembly on a bench and remove the heater core cover screws.
      10. Remove the heater core from the heater case.
        FIG : View of the heater case assembly -Chevy/GMC Silverado \

        image

      11. FIG : View of the heater core-Chevy/GMC Silverado \

        image

      12. To install:

        1. Install the heater core to the heater case.
        2. Install the heater core cover screws and tighten to 14 inch lbs. (1.6 Nm).
        3. Install the heater case assembly and the assembly-to-chassis screws, then, tighten the screws to 35 inch lbs. (4 Nm) and the nuts to 80 inch lbs. (9 Nm).
        4. Connect any electrical connectors that may have been disconnected.
        5. Install the instrument panel carrier.
        6. Connect the mode control cable to the heater case assembly.
        7. Connect the temperature control cable to the heater case assembly.
        8. Connect the heater hoses to the heater core.
        9. Connect the negative battery cable.
        10. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

        1. Drain the engine cooling system into a clean container for reuse.
        2. Remove or disconnect the following:

          Negative battery cable Heater hoses from the heater core Temperature control cable from the heater case assembly Disconnect the mode control cable from the heater case assembly Instrument panel carrier to provide access to the heater case assembly Electrical connectors that may interfere with the heater case assembly removal Heater case assembly-to-chassis screws/nuts and the assembly. Place the heater case assembly on a bench. Heater core cover screws Heater core from the heater case

          Front



          1. Drain the engine cooling system into a clean container for reuse.
          2. Remove or disconnect the following:
            NOTE Removal of the heater assembly may require the help of an assistant.


            Negative battery cable Heater hoses from the heater core Instrument panel storage compartment Electrical connectors, as necessary, that may be in the way Center floor air distribution duct Hinge pillar trim kick panels Blower motor cover screws and the cover Blower motor screws and the blower motor Steering wheel and the steering column Instrument panel fasteners and pull the instrument panel back far enough to gain access to the heater assembly Screw located on the interior side near the evaporator pipe, if equipped, while holding the heater assembly against the firewall 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts, working in the engine compartment


            7 heater cover-to-heater assembly screws and the cover Heater core from the heater assembly

            Click image to see an enlarged view

            Fig. View of the HVAC assembly mounting



            Click image to see an enlarged view

            Fig. Removing the heater core from the HVAC module



          To install:

          1. Install or connect the following:
            NOTE Installation of the heater assembly may require the help of an assistant.


            Heater core to the heater assembly Heater cover and the 7 heater cover-to-heater assembly screws


            4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts. Torque the screws to 17 inch lbs. (1.9 Nm) and the nuts to 25 inch lbs. (2.8 Nm). Screw located on the interior side near the evaporator pipe, if equipped. Torque the screw to 97 inch lbs. (11 Nm). Instrument panel and the instrument panel fasteners Steering column and the steering wheel Blower motor and the blower motor screws Blower motor the cover and the cover screws Hinge pillar trim kick panels Center floor air distribution duct Electrical connectors that were disconnected Instrument panel storage compartment Heater hoses to the heater core Negative battery cable
          2. Refill the engine cooling system.
          3. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

          1. Disconnect the negative battery cable.
          2. Drain the engine cooling system into a clean container for reuse.
          3. Disconnect the heater hoses from the heater core.
          4. Remove the instrument panel storage compartment.
          5. Disconnect the electrical connectors, as necessary, that may be in the way.
          6. Remove the center floor air distribution duct.
          7. Remove the hinge pillar trim kick panels.
          8. Remove the blower motor cover screws and the cover.
          9. Remove the blower motor screws and the blower motor.
          10. Remove the steering wheel and the steering column (standard & tilt).
          11. Remove the instrument panel fasteners and pull the instrument panel back far enough to gain access to the heater assembly.
          12. While holding the heater assembly against the firewall, remove the screw located on the interior side near the evaporator pipe, if equipped.
          13. In the engine compartment, remove the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts.
            NOTE Removal of the heater assembly may require the help of an assistant.
          14. Remove the 7 heater cover-to-heater assembly screws and the cover.
          15. Remove the heater core from the heater assembly.

            Click image to see an enlarged view

            Fig. View of the front heater assembly-Chevy/GMC C/K-Series, Blazer, Jimmy, Sierra, Suburban, Tahoe, Yukon



            Click image to see an enlarged view

            Fig. Location of the front heater assembly-to-chassis fasteners-Chevy/GMC C/K-Series, Blazer, Jimmy, Sierra, Suburban, Tahoe, Yukon


          To install:

          1. Install the heater core to the heater assembly.
          2. Install the heater cover and the 7 heater cover-to-heater assembly screws.
            NOTE Installation of the heater assembly may require the help of an assistant.
          3. In the engine compartment, install the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts. Torque the screws to 17 inch lbs. (1.9 Nm) and the nuts to 25 inch lbs. (2.8 Nm).
          4. While holding the heater assembly against the firewall, install the screw located on the interior side near the evaporator pipe, if equipped. Torque the screw to 97 inch lbs. (11 Nm).
          5. Install the instrument panel and the instrument panel fasteners.
          6. Install the steering column (standard & tilt) and the steering wheel.
          7. Install the blower motor and the blower motor screws.
          8. Install the blower motor the cover and the cover screws.
          9. Install the hinge pillar trim kick panels.
          10. Install the center floor air distribution duct.
          11. Connect the electrical connectors that were disconnected.
          12. Install the instrument panel storage compartment.
          13. Disconnect the heater hoses to the heater core.
          14. Refill the engine cooling system.
          15. Connect the negative battery cable.
          16. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.


Customer: replied 4 years ago.

i have everything i can see taking apart but dash will not come out / dash flips up about 6 inches but wont come out help

 

Expert:  Tim's Auto Repair replied 4 years ago.

hi

you need to raise it up and pull out

thanks

 

Trim Panel Replacement - Upper

TRIM PANEL REPLACEMENT - INSTRUMENT PANEL (I/P) UPPER

REMOVAL PROCEDURE

  1. If equipped with air conditioning (A/C), set the air flow control to the instrument panel (IP) vent position.
  2. Apply the parking brake to prevent the vehicle from moving.
  3. If the transmission is automatic, move the shift lever all the way down.
  4. Tilt the steering wheel to the full down position.
  5. Remove the IP cluster trim plate bezel.

 


 

  1. Remove the end panels. The left panel is shown, and the right panel is similar.
  2. Remove the right side air outlets.

 


 

  1. Remove the assist handle by depressing the release tabs accessed through the air outlet duct holes.
  2. Remove the windshield pillar garnish moldings.
  3. Remove the bolts retaining the panel to IP assembly.

 


 

  1. Lift the trim panel up to disconnect the electrical connector (1) to the ambient light sensor on the underside of the trim panel.

 


 

  1. Remove the trim panel from the IP assembly.

INSTALLATION PROCEDURE


 

  1. Connect the electrical connector (1) to the ambient light sensor on the underside of the trim panel.

 


 

  1. Install the trim panel to the IP assembly.
  2. Install the trim panel retaining screws. Tighten Tighten the trim panel retaining screws to 2 N.m (18 lb in) .
  3. Install the windshield pillar garnish moldings.

 


 

  1. Align the assist handle with the holes in the IP assembly. Push the handle in order to engage the retaining tabs.
  2. Install the right side air outlets.

 


 

  1. Install the end panels. The left panel is shown, and the right panel is similar.
  2. Install the IP cluster trim plate bezel.
  3. Tilt the steering wheel to the normal driving position.
  4. If the transmission is automatic, move the shift lever to the park position.
  5. Disengage the parking brake.
Trim Panel Replacement - Lower

INSTRUMENT PANEL (I/P) TRIM PANEL REPLACEMENT - LOWER

REMOVAL PROCEDURE

  1. Remove the instrument panel (I/P) cluster trim bezel.
  2. Remove the center console, if equipped.

 


 

  1. Open the I/P compartment door.
  2. Remove the bolts retaining the lower trim panel to the I/P assembly.

 


 

  1. Disconnect all of the electrical connectors (1, 2, 3).
  2. Remove the lower trim panel from the I/P assembly.

INSTALLATION PROCEDURE


 

  1. Connect all of the electrical connectors (1, 2, 3).

 


 

  1. Install the bolts connecting the lower trim panel to the I/P assembly. Tighten Tighten the bolts to 2 N.m (18 lb in) .
  2. Install the center console, if equipped.
  3. Install the I/P cluster trim bezel.
Customer: replied 4 years ago.

going good but how do sterring wheel come off

Customer: replied 4 years ago.
how do steering wheel come off
Customer: replied 4 years ago.
you said steering wheel has to come off but how do it come off
Expert:  Tim's Auto Repair replied 4 years ago.

hi

the steering wheel dont need to come off..just unbolt the column and lay it down

thanks

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