LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2013 >> Encore Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (HVAC System - Manual) >> Repair Instructions >> Mode Control Cam Alignment (C60) >> Alignment Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Alignment Procedure

WARNING: This page is about a different car, the 2016 Chevrolet Trax and 2016 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    The HVAC module must be removed to accurately set the mode cam gear timing. Failure to do so may result in poor HVAC performance, and damage to the HVAC module.

  1. Remove the heater and air conditioning evaporator and blower module assembly (HVAC). Refer to Heater and Air Conditioning Evaporator and Blower Module Removal and Installation .
  2. Remove the mode control cam. Refer to Mode Control Cam Replacement (C60) .
    3. Fig 1: Mode Cam Screw And Mode Cam
    GM2963902Courtesy of GENERAL MOTORS COMPANY
  3. Remove the mode cam screw (1) and the mode cam (2) from the HVAC module.
  4. Inspect the mode valve levers and internal vent valve operation prior to installing the new mode control cam assembly.
  5. Replace the components affecting the proper operation of the vent valves.
    6. Fig 2: Identifying Defrost Valve Lever, Vent Valve Lever And Heater Valve Lever
    GM2963910Courtesy of GENERAL MOTORS COMPANY
  6. Rotate the defrost valve lever (1), and vent valve lever (2) clockwise, and heater valve lever (3) counter clockwise to the position shown.
  7. Using a small brush, apply a lithium based lubricant to the channels of the heater cam, and the mode cam where the levers travel.
    8. Fig 3: Identifying Heater Cam, Heater Valve Lever Pin, Mode Control Cable End And Screw
    GM2963911Courtesy of GENERAL MOTORS COMPANY
  8. Install the heater cam (1) aligning the channel on the back side heater cam with the heater valve lever pin (2).
  9. Install the mode control cable end (3) into the heater cam, aligning the large male tooth gear on the mode control cable end with the larger heater cam female tooth gear as indicated by the arrows (4).
    10. CAUTION:

    Refer to Fastener Caution .

  10. Install the mode control cable end screw (5).
    11. Fig 4: Turning Control Knob To Vent Mode Position
    GM2963912Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If the heater cam is not aligned to heater valve lever pin correctly, the mode control knob will not function properly.

  11. Turn the control knob on the heater and air conditioning control head to the vent mode position as indicated by the arrow (1).
    12. Fig 5: Mode Cam, Defroster Valve Lever Pin, Vent Valve Lever Pin, Mode Control Cam And Large Male Tooth
    GM2963914Courtesy of GENERAL MOTORS COMPANY
  12. Install the mode cam (1) aligning the channels on the back side mode cam with the defroster valve lever pin (2), and the vent valve lever pin (3). The pins should be visible through the inspection windows.
  13. Verify that the large female tooth on the mode control cam (4) is aligned with the large male tooth (5) on the heater cam.
  14. Install the mode cam screw (6).
scientia non olet · About LEMON Manuals