GMC 2005 T-Series Owner's Manual page 43

Cold Weather Starting
The following tips will help you get good starting in
cold weather.
Use the recommended engine oil when the outside
temperature drops below freezing. See Engine Oil on
page 5-14. When the outside temperature drops
below 0°F (−18°C), use of the engine coolant heater
is recommended.
See Engine Coolant Heater on page 2-13 for more
information.
See What Fuel to Use on page 5-6 for information on
what fuel to use in cold weather.
Engine Alarm and Automatic Shutdown
If your vehicle has this feature, your check gages light
will come on if the system senses high engine
temperature or low engine oil pressure. See Check
Gages Warning Light on page 3-36 for more information.
If high engine temperature or low engine oil pressure
is detected, you will also hear a tone alarm. The alarm
and the light will remain on until the condition is fixed.
If the engine temperature or oil pressure condition
worsens, the tone alarm will increase in frequency.
If the system senses low engine oil coolant, the alarm
and the low coolant warning light will come on. See Low
Coolant Warning Light on page 3-31 for more
information.
The alarm means that your engine will shut down. See
Engine Shutdown Warning Light on page 3-34 for
more information.
Pull off the road and shut off the engine. Do not start it
until the vehicle is repaired. If the engine shuts down
when you are still in traffic, you can restart the engine
and get another 25-30 seconds of operation. The engine
will not shut down until the vehicle speed is less than
5 mph (8 km/h).
Notice: If you try to operate the vehicle after the
engine automatically shuts down, you may damage
the vehicle. Have your vehicle repaired as soon
as possible.
2-9