Chevrolet 2012 Colorado Owner's Manual page 345

Use the following procedure to dolly
tow a two-wheel-drive vehicle from
the rear:
1. Attach the dolly to the tow
vehicle following the dolly
manufacturer's instructions.
2. Drive the rear wheels onto the
dolly.
3. Firmly set the parking brake.
See
.
4. Put an automatic transmission in
P (Park) or a manual
transmission in 1 (First).
5. Secure the vehicle to the dolly
following the manufacturer's
instructions.
6. Use an adequate clamping
device designed for towing to
ensure that the front wheels are
locked into the straight position.
7. Turn the ignition to LOCK/OFF.
If the vehicle being towed will
not be started or driven for
six weeks or more, remove the
battery cable from the negative
terminal (post) of the battery to
prevent the battery from
draining.
Use the following procedure to dolly
tow a four-wheel-drive vehicle from
the rear:
1. Attach the dolly to the tow
vehicle following the dolly
manufacturer's instructions.
2. Drive the rear wheels onto the
dolly.
3. Firmly set the parking brake.
See
.