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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 538 (POWER DOOR LOCK SYSTEM AND RELEASE SYSTEMS)REPAIR INSTRUCTIONSLIFTGATE CALIBRATION
2009 Chevrolet Tahoe Base, 4.8 C

Liftgate Calibration

2009 Chevrolet Tahoe Base, 4.8 CSECTION Liftgate Calibration
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

To ensure proper calibration of the liftgate, the liftgate assembly must be at room temperature during calibration.

Power liftgate calibration must be performed after any of the liftgate system components have been disconnected, disassembled, repaired, or replaced.

Conditions 

Use this procedure after replacing, repairing, or disassembling any portion of the power liftgate assembly.

NOTE:

The liftgate must be in the full closed position when performing the liftgate calibration procedure. Failure to do so will result in a failed liftgate calibration.

Calibrate Liftgate

  1. Close the liftgate.
  2. Install a scan tool.
  3. Clear All DTCs before proceeding.
  4. Navigate to the Liftgate Module menu.
  5. Select Module Setup menu item
  6. Select LGM Open/Close Test and follow the directions displayed on the screen
NOTE:

DTC B1019 00 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the travel limits are learned by the LGM, the liftgate module will exit calibration mode and DTC B1019 00 become a history code. You will hear a loud clunk at the top of travel the first time the liftgate opens. The system is learning where full open is for this vehicle. There will be no clunk after the first full opening and closing.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.