GMC 2012 Sierra Series Owner's Manual page 413

Then, without shutting off the
engine, follow these steps:
1. Locate the transmission dipstick
handle with this graphic which is
located at the rear of the engine
compartment, on the passenger
side of the vehicle.
See Engine Compartment
Overview on page 10 6 for more
information on location.
2. Flip the handle up, then 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.
4. Check both sides of the dipstick,
and read the lower level. The
fluid level must be in the COLD
area, below the cross-hatched
area, for a cold check or in the
HOT or cross-hatched area for a
hot check. Be sure to keep the
dipstick pointed down to get an
accurate reading.
5. 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.
I n f o r ma t i o n P r o v i d e d b y :
Vehicle Care
Consistency of Readings
Always check the fluid level at least
twice using the procedure described
previously. Consistency (repeatable
readings) is important to maintaining
proper fluid level. If readings are still
inconsistent, contact the dealer.
How to Add Automatic
Transmission Fluid
Refer to Recommended Fluids and
Lubricants on page 11 12 to
determine what kind of transmission
fluid to use.
Using a funnel, add fluid down the
transmission dipstick tube 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 0.5 Liter (1 Pint).
Do not overfill.
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