GMC 2005 Sierra 1500 Pickup, Owner'S Manual, Page: 427 / 574

How to Add Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission fluid to use. See Recommended
Fluids and Lubricants on page 6-14.
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 automatic transmission fluid labeled
other than DEXRON
®
-III, Approved for the
H-Specification, may damage your vehicle, and the
damages may not be covered by your warranty.
Always use automatic transmission fluid labeled
DEXRON
®
-III, Approved for the H-Specification.
•
After adding fluid, recheck the fluid level as
described under “How to Check,” earlier in
this section.
•
When the correct fluid level is obtained, push the
dipstick back in all the way.
Manual Transmission Fluid
When to Check
A good time to have it checked is when the engine oil is
changed. See your maintenance schedule to find out
when to change your transmission fluid.
How to Check
Because this operation can be a little difficult, you may
choose to have this done at your GM dealership
service department.
If you do it yourself, be sure to follow all the instructions
here, or you could get a false reading.
Notice: Too much or too little fluid can damage
your transmission. Too much can mean that some
of the fluid could come out and fall on hot engine
part or exhaust system parts, starting a fire.
Too little fluid could cause the transmission to
overheat. Be sure to get an accurate reading if you
check your transmission fluid.
Check the fluid level only when your engine is off, the
vehicle is parked on a level place and the transmission
is cool enough for you to rest your fingers on the
transmission case.
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