Chevrolet TrailBlazer, Service Manual, Page: 416 / 677

Hot Check Procedure
CAUTION
Use this procedure to check the transmission fluid level when the fluid temperature is
between 180-200°F (82-93°C). The fluid level rises as fluid temperature increases, so it is
important to ensure the transmission temperature is within range.
1. Start the engine and remove the dipstick from the tube, then wipe the dipstick end
with a clean rag or paper towel.
2. Install the dipstick completely in the tube, wait three seconds and then pull it back
out.
CAUTION
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.
3. Keep the dipstick tip pointing down and check both sides of the dipstick. Read the
lower level. Repeat the check procedure to verify the reading.
4. A safe operating fluid level is within the HOT crosshatch band on the dipstick. If the
fluid level is not within the HOT band, and the transmission temperature is between
180-200°F (82-93°C), add or drain fluid as necessary to bring the level into the
HOT band. If the fluid level is low, add only enough fluid to bring the level into the
HOT band.
5. If the fluid level is low, add only enough fluid to bring the level into the HOT band. It
does not take much fluid, generally less than one pint. Do not overfill. Also, if the
fluid level is low, inspect the transmission for leaks.
6. If the fluid level is in the acceptable range, push the dipstick back into the dipstick
tube all the way, and then flip the handle down to lock the dipstick in place.
7. If equipped, reset the transmission oil life monitor if the fluid was changed.