Buick Envista Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18181221) - 2025
Driving and Operating 149
internal thermostat in the plug end of the cord
w
ill prevent engine coolant heater operation at
temperatures above −18 °C (0 °F).
To Use the Engine Heater
1. Turn off the engine.
{ W
arning
Improper use of the heater cord or an
e
xtension cord can damage the cord and
may result in overheating and fire.
•
Plug the cord into athree-prong
electrical utility receptacle that is
protected by aground fault detection
function. An ungrounded outlet could
cause an electric shock.
•
Use aweatherproof, heavy-duty, 15
amp-rated extension cord if needed.
Failure to use the recommended
extension cord in good operating
condition, or using a damaged heater or
extension cord, could make it overheat
and cause afire, property damage,
electric shock, and injury.
(Continued)
Warning (Continued)
•
D
o not operate the vehicle with the
heater cord permanently attached to
the vehicle. Possible heater cord and
thermostat damage could occur.
•
While in use, do not let the heater cord
touch vehicle parts or sharp edges. Never
close the hood on the heater cord.
•
Before starting the vehicle, unplug the
cord, reattach the cover to the plug, and
securely fasten the cord. Keep the cord
away from any moving parts.
2. Remove the heater cord from the
r
ear compartment.
3. Check the heater cord for damage. If it is
damaged, do not use it. See your dealer
for areplacement. Inspect the cord for
damage yearly.
4. Plug the cord into the receptacle in the
front fascia.
5. Plug the other end of the cord into a normal,
grounded 110-volt AC outlet.
The length of time the heater should remain
p
lugged in depends on several factors. Ask
adealer in the area where you will be parking
the vehicle for the best advice on this.
Retained Accessory Power (RAP)
When the vehicle is turned from on to off, the
following features (if equipped) will continue
to function for up to 10 minutes, or until
the driver door is opened. These features
will also work when the vehicle is on or in
accessory mode:
•
Infotainment System
•
Power Windows (during RAP this
functionality will be lost when any door
is opened)
•
Sunroof (during RAP this functionality will
be lost when any door is opened)
•
Auxiliary Power Outlet
•
Audio System
•
OnStar System