Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Power liftgate function will only be allowed if certain operating criteria are met. Any of the following may cause the power liftgate not to function:
- After a power loss of the low current battery supply until the ignition is cycled
- Vehicle is not in park.
- Engine cranking is present.
- Ambient temperature at the PLGM must be within -17 to +80°C (+1 to +176°F).
- Liftgate motor overcurrent is detected.
- System voltage is out of range.
- A DTC is set that disables power liftgate functionality.
- The liftgate is locked when attempting to open from exterior handle.
- The theft deterrent system is enabled.
The liftgate also receives input from 2 pressure sensing object detection sensors. If either of these sensors indicate an object may be pinched as the liftgate is brought to the closed position, the liftgate will reverse direction and power close operation will be suspended until the pressure against the sensor is released.