GMC 1993 Sonoma Owner's Manual page 76

Features & Controls
3.
If you have four-wheel drive with a manual transfer case shift lever, be
sure the transfer case is in a drive gear-not in N (Neutral).
4.
Move the ignition key to LOCK.
5. Remove the key and take it with you. If you can walk away from your
vehicle with the ignition key in your hand, your vehicle is in P (Park).
Leaving Your Vehicle With the Engine Running
(Automatic Transmission Models Only)
CAUTION
I
A
It can tie dangerous to leave your vehicle with the engine runnins
four vehicle could move suddenly if -the shift lever is not fully in
I
(Park) with the parking brake firmly
SE
If you have four-wheel drive
with a manual transfer case shift lever and your transfer case is in N
(Neutral), your vehicle will be free to roll, even if your shift lever
is
in
P (Park). So be sure the transfer case is in a drive gear-not in N
(Neutral). And, if you leave the vehicle with the engine running, it
.
--:'.:.
- .
could overheat and even catch fire. You or others could be injured.
' ?
* I : .
Don't leave your vehicle with the engine running unless you have to.
. .
. . ~
If you have to leave your vehicle with the engine running, be sure your
vehicle is in P (Park) and your parking brake is firmly set before you leave it.
If you have four-wheel drive with a manual transfer case shift lever, be sure
that the transfer case is in a drive gear-not in N (Neutral). After you've
moved the shift lever into the P (Park) position, hold the regular brake pedal
down. Then, see if you can move the shift lever away from P (Park) without
first pulling it toward you. If you can, it means that the shift lever wasn't fully
locked into P (Park).
Parking Your Vehicle (Manual Transmission Models
Only)
Before you get out of your vehicle, put your manual transmission in R
(Reverse) and firmly apply the parking brake.
If you have four-wheel drive with a manual transfer case shift lever, be sure
your transfer case is in a drive gear. Your vehicle could roll if it isn't.
If you are parking on a hill, or if your vehicle is equipped to tow a trailer,
see "Parking on Hills" or "Towing a Trailer" in the Index.
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