Cold Check Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Use the cold check procedure only as a reference to determine if the transmission has enough fluid to be operated safely until a hot check procedure can be made. The hot check procedure is the most accurate method to check the fluid level. Perform the hot check procedure at the first opportunity.
Use this cold check procedure to check fluid level when the TFT is between 27-32°C (80-90°F).

Start the engine and locate the transmission dipstick at the rear of the engine compartment, on the passenger's side of the vehicle.
Flip the handle up, and then pull out the dipstick and wipe the dipstick end with a clean rag or paper towel.
Install the dipstick by pushing it back in the dipstick tube all the way, wait three seconds and then pull it back out again.

IMPORTANT: Always check the fluid level at least twice. Consistent readings are important to maintaining proper fluid level. If inconsistent readings are noted, inspect the transmission vent assembly to ensure it is clean and unclogged.

Keep the dipstick pointing down and check both sides of the dipstick, and read the lower level. Repeat the check procedure to verify the reading.
Inspect the color of the fluid on the dipstick. Refer to Fluid Condition Inspection in this procedure.
If the fluid level is below the COLD check line, add only enough fluid as necessary to bring the level into the COLD line. It does not take much fluid, generally less than one pint (0.5L). Do not overfill.
If the fluid level is in the acceptable range, push the dipstick back in all the way, then flip the handle down to lock the dipstick in place.
Perform a hot check at the first opportunity after the transmission reaches a normal operating temperature between 82-93°C (180-200°F).