Question: how to check automatic transmission fluid in 2003 cavalier?
Answer: Drive the vehicle for 5 to 10 minutes to warm up the transmission fluid. ... 
Pop the hood and locate the transmission fill cap on the lower left-hand side (driver's side) on the center of side of the engine. ... 
Raise the vehicle. ... 
Crawl under vehicle using a creeper if you have one, and locate the bottom of the transmission.