GMC 2007 Sierra 1500 Pickup, Owner'S Manual

Page: 496 / 674

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.
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
3 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 629 .
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.
Notice: Use of the incorrect automatic
transmission fluid may damage your vehicle,
and the damages may not be covered by
your warranty. Always use the automatic
transmission fluid listed in
Recommended
Fluids and Lubricants on page 629 .
•
After adding fluid, recheck the fluid level as
described under “How to Check Automatic
Transmission Fluid,” earlier in this section.
•
When the correct fluid level is obtained, push
the dipstick back in all the way.
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