Chevrolet Silverado Classic 2007 Owner's Manual page 496

5. Perform a hot check at the first opportunity
after the normal operating temperature of
160°F (71°C) to 200°F (93°C) is reached.
6. If the fluid level is in the acceptable range,
push the dipstick back in all the way.
Hot Check Procedure
The fluid must be hot to ensure an accurate
check. The fluid level rises as the temperature
increases.
1. Operate the transmission in DRIVE (D) range
until the normal operating temperature of
160°F (71°C) to 200°F (93°C) is reached.
2. Pull out the dipstick and wipe it with a clean
rag or paper towel.
3. Push it back in all the way, wait three seconds
and then pull it back out again. Repeat the
check procedure to verify the reading.
4. Safe operating level is within the HOT RUN
band on the dipstick. The width of the HOT
RUN band represents approximately
1.06 quart (1.0 liter) of fluid at normal
operating temperature.
496
5. If the fluid level is not within the HOT RUN
band, add or drain fluid as necessary to
bring the fluid level to within the HOT RUN
band.
6. If the fluid level is in the acceptable range,
push the dipstick back in all the way.
How to Add Automatic
Transmission Fluid
Refer to the Maintenance Schedule to determine
what kind of transmission fluid to use. See
Recommended Fluids and Lubricants on page 630.
Add fluid only after checking the transmission
fluid while it is hot. A cold check is used only as a
reference. If the fluid level is low, add only
enough of the proper fluid to bring the level up to
the HOT area for a hot check. It does not take
much fluid, generally less than one pint (0.5 L). Do
not overfill.