Normal Inhibits Which Result In Blinking PRNDL
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Inhibits which result in a blinking PRNDL are as follows:
- High engine speed Neutral to gear range shifts when a Neutral to Drive or Neutral to Reverse shift is made when engine RPM is too high, the shift will be inhibited to Neutral. The TCM has torque management capability and will attempt to slow the engine to a point where it will make the requested shift.
- High throttle or torque direction change shifts from Reverse to Drive, Drive to Reverse, Neutral to Drive, and Neutral to Reverse shifts where throttle position is greater then 25 percent transmission will be inhibited to Neutral. The TCM has torque management capability, and will attempt to slow the engine to a point where it will make the requested shift.
- If the 4-wheel drive transfer case is shifted into Neutral while the transmission is in Drive or Reverse, the transmission will continue to command the gear range until output speed is low, at which point Neutral is commanded. If the driver attempts to shift the transmission from Neutral to Drive or Neutral to Reverse with the transfer case in Neutral, the PRNDL display will blink immediately.
- High output speed direction change shifts Reverse to Drive, Drive to Reverse, and Neutral to Reverse shifts initiated above 300 RPM output speed will be inhibited to Neutral.
- Insufficient transmission fluid and lack of initial pump prime caused by refilling the transmission.
- Extremely low transmission fluid temperature.
- A shift out of Neutral when ATF temperature is below -49°F (-45°C) may be inhibited.