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GMC 1998 Sonoma Owner's Manual page 89

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Torque Lock (Automatic Transmission)
If you are parking on a hill and you don't shift your
transmission into
PARK (P)
properly, the weight of the
vehicle may put too much force on the parking pawl in
the transmission. You may find it difficult to pull the
shift lever out of PARK (P). This is called "torque lock."
To prevent torque lock, set the parking brake and then
shift into PARK (P) properly before you
leave
the
driver's seat. To find out how, see "Shifting Into
PARK (P)" in the Index.
When you are ready to drive, move the shift lever out
of PARK (P) before you release the parking brake.
If torque lock does occur, you may need to have another
vehicle push yours a little uphill to take some of the
pressure from the parking pawl in the transmission, so
you can pull the shift lever out of PARK (P).
Shifting Out of PARK (P)
(Automatic Transmission)
Your vehicle has a Brake-Transmission Shift Interlock
(BTSI).
You have to fully apply your regular brake
before you can shift from PARK (P) when the ignition
is in the
RUN
position. See "Automatic Transmission
Operation" in the Index.
If you cannot shift out of PARK
(P),
ease pressure on
the shift lever -- push the shift lever all the way into
PARK (P) as you maintain brake application. Then
move the shift lever into the gear you want (you must
press the shift lever button if you have the console
shift lever).
If you ever hold the brake pedal down but still can't
shift out of PARK (P), try this:
1.
Turn the key to OFF.
2. Apply and hold the brake until the end of Step 4.
3. Shift to NEUTRAL (N).
4. Start the vehicle and then shift to the drive gear
5. Have
the vehicle fixed as soon as you can.
you want.
2-25

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