Pontiac 1997 Grand Prix Owner's Manual page 293

Checking the Fluid Level
Park your vehicle on a level place. Keep the engine
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With the parking brake applied, place the shift lever
With your foot on the brake pedal, move the shift
running.
in PARK (P).
lever through each gear range, pausing for about
three seconds in each range. Then, position the shift
lever in PARK (P).
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Let the engine run at idle for three to five minutes.
Then, without shutting off the engine, follow these steps:
3100 Engine
The transaxle fluid dipstick
handle is the red loop near
the back of the engine.