Chevrolet 2001 3500HD, Manual

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Then, without shutting off the engine, follow these steps:
1. The red transmission dipstick handle is located at the
rear of the engine compartment, on the passenger’s
side. See “Engine Compartment Overview” in the
Index for more information on location. Flip the
handle up and then pull out the dipstick and wipe
it with a clean rag or paper towel.
2. Push it back in all the way, wait three seconds and
then pull it back out again.
3. 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 area or cross
-
hatched area for a hot check.
4. 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.