From the service manual:
Skip Shift Description and Operation
I lost my manual for my 06 GTO and i occasionaly get the flashing 1st to 4th indicator but its to late to actually do it when i see it. Can someone please explain what this means????
The skip shift solenoid is a performance feature which forces the driver to shift from first gear to fourth gear during light acceleration and low engine load conditions. This feature is used to ensure good fuel economy and compliance with federal economy standards. The skip shift system consist of the following components:
The powertrain control module (PCM)
The skip shift solenoid
The skip shift lamp
With the ignition ON, battery voltage is supplied directly to the skip shift solenoid. The PCM controls the solenoid by grounding the control circuit. When the skip shift system is active the PCM also grounds the control circuit of the skip shift lamp. The lamp illuminates to inform the driver that the 1-4 skip shift is engaged. The PCM determines when the skip shift system is active when the following parameters are met:
The vehicle speed is between 24-31 km/h (15-19 mph).
The engine coolant temperature (ECT) is greater than 77°C (171°F).
The barometric pressure (BARO) is greater than 76 kPa.
The accelerator pedal position (APP) is less than 26 percent.
When the conditions are met the PCM grounds the skip shift solenoid control circuit. This energizes the skip shift solenoid and mechanically blocks the gear shift lever from going into the second or third gear positions. When the driver pulls back on the shift lever with the system enabled, the transmission will go into fourth gear.
When the conditions for skip shift engagement are no longer met the PCM disables the skip shift solenoid, allowing the driver to use second and third gears.
Once the skip shift solenoid is enabled the system will not be re-enabled until the vehicle speed returns to 0 km/h (0 mph) and the conditions for enabling skip shift solenoid are met.
I rarely saw the light come on when it was enabled maybe twice. I shift like JUDGE and reved my engine to 3k between lower speeds.