OnStar Overview
EmergencyConversions and Add-Ons
Add-On Electrical Equipment
Caution
Some electrical equipment can damage the vehicle or cause components
to not work and would not be covered by the warranty. Always check with your dealer
before adding electrical equipment.
Add-on equipment can drain the vehicle's 12-volt battery, even i ...
Liftgate
To lock or unlock the liftgate from the outside, use the key in the liftgate
lock.
If equipped, press on the RKE transmitter
to unlock all doors and press to lock.
See Remote Keyless Entry (RKE) System Operation on page 2-3.
Without RKE
With RKE
To lock or unlock the liftgate fro ...
Engine Heater
The engine heater can provide easier starting and better fuel economy during
engine warm-up in cold weather conditions at or below -18°C (0°F). Vehicles with
an engine heater should be plugged in at least four hours before starting.
Turn off the engine.
Open the hood and unwrap the ...