Automatic Transmission Operation - Chevrolet 2009 Suburban Owner's Manual

Automatic Transmission Operation

If the vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
If the vehicle is has an automatic transmission, it has an
electronic shift position indicator within the instrument
panel cluster. This display comes on when the ignition
key is turned to the ON/RUN position.
There are several different positions for the shift lever.
®
Hydra-Matic 4-Speed
Automatic Transmission
2-32
Hevay Duty 6-Speed Automatic Transmission
Shown (Light Duty Similar)
See "Range Selection Mode" later in this section.
P (Park): This position locks the rear wheels. It is the
best position to use when starting the engine because
the vehicle cannot move easily. When parked on a
hill, especially when the vehicle has a heavy load, you
might notice an increase in the effort to shift out of
P (Park). See Torque Lock (Automatic Transmission)
under Shifting Into Park on page 2-47 for more
information.