GM Service Manual Online
For 1990-2009 cars only

Cooling System Overheating

  1. If overheating occurs due to prolonged idling in gear, instruct the operator on driving techniques which would reduce the possibility of engine overheating:
  2. • Idle in neutral as much as possible and raise engine RPM using accelerator pedal.
    • Turn air conditioning off during extended idling.
  3. If none of the above conditions apply, refer to Cold Engine, Slow Warm-Up, Not Enough Heat Cold Engine, Slow Warm-Up, Not Enough Heat .