GMC Sierra
GMC Sierra

See also:
Driving on Grades
Reduce speed and shift to a lower gear before starting down a long or steep downgrade. If the transmission is not shifted down, the brakes might get hot and no longer work well.
Vehicles can tow in D ...
Maintenance When Trailer Towing
The vehicle needs service more often when pulling a trailer. See this manual's
Maintenance Schedule or Index for more information. Things that are especially important
in trailer operation are ...
Door Locks
To lock or unlock a door manually:
• From the inside use the door lock knob on the window sill.
• From the outside turn the key toward the front or rear of the vehicle, or press the
or
but ...





