Where is the transmission drain plug on a 2003 Chevy impala?

The transmission drain plug location on a 2003 Chevy Impala depends on whether it has a 3.4L or a 3.8L engine. There's no single universal location. You'll need to consult a repair manual specific to your Impala's engine.

A repair manual (either a physical book or a digital version) will show you a diagram of the transmission and clearly indicate the drain plug's position. Trying to find it without a proper diagram risks damaging other components. Improper servicing can also damage the transmission.