roof GMC SAVANA 2021 User Guide

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-14583543) -
2021 - crc - 7/10/20
138 Driving and Operating
Fast Idle System
If equipped, this feature is available only
with cruise control. The manual fast idle
switch is operated using the cruise control
buttons on the left side of the steering
wheel.
This system can be used to increase engine
idle speed whenever the following
conditions are met:
.The parking brake is set.
.The brake pedal is not pressed.
.The vehicle must not be moving and the
accelerator must not be pressed.
To control the fast idle:
.To enable the Fast Idle System, press and
release the cruise control on/off button
and ensure that the switch indicator light
is lit.
.Press and release the cruise control SET-
button. Engine speed will be held at
approximately 1200 rpm.
When the fast idle is active, the Driver
Information Center (DIC) will display FAST
IDLE ON.
One of the following actions will turn off
the fast idle:
.Pressing the brake.
.Selecting the cruise control cancel button.
.Releasing the parking brake.
.Moving the transmission shift lever out of
P (Park) or N (Neutral).
.Selecting the cruise control on/off button
when it was previously on.
.Pressing the cruise control SET- button a
second time.
.Pressing the accelerator more than
one-quarter of the way down.
.Turning the ignition off.
Retained Accessory Power (RAP)
When the ignition 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 ignition is
in RUN or ACC/ACCESSORY:
.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
Engine Coolant Heater
If the vehicle has a diesel engine, see the
Duramax diesel supplement.
{Warning
Do not plug in the engine block heater
while the vehicle is parked in a garage or
under a carport. Property damage or
personal injury may result. Always park
the vehicle in a clear open area away
from buildings or structures.
The engine coolant 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 coolant heater should be plugged in
at least four hours before starting.
An internal thermostat in the plug end of
the cord may exist which will prevent
engine coolant heater operation at
temperatures above −18 °C (0 °F).
To Use the Engine Coolant Heater
1. Turn off the engine.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-14583543) -
2021 - crc - 7/10/20
Driving and Operating 139
2. Open the hood and unwrap theelectrical cord.
The cord for the engine coolant heater is
on the driver side of the engine
compartment.
Check the heater cord for damage. If it is
damaged, do not use it. See your dealer
for a replacement. Inspect the cord for
damage yearly.
3. Plug it into a normal, grounded 110-volt AC outlet.
{Warning
Improper use of the heater cord or an
extension cord can damage the cord and
may result in overheating and fire.
.Plug the cord into a three-prong
electrical utility receptacle that is
protected by a ground fault detection
function. An ungrounded outlet could
cause an electric shock.
.Use a weatherproof, 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
(Continued)
Warning (Continued)
or extension cord, could make it
overheat and cause a fire, property
damage, electric shock, and injury.
.Do 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.
4. Before starting the engine, be sure to unplug and store the cord as it was
before to keep it away from moving
engine parts and prevent damage.
The length of time the heater should remain
plugged in depends on several factors. Ask a
dealer in the area where you will be parking
the vehicle for the best advice on this.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-14583543) -
2021 - crc - 7/10/20
204 Vehicle Care
6. Remove the taillamp/turn signal lamp (1)or back-up lamp (2) bulb socket by
turning it counterclockwise one-quarter
turn and pulling it out of the lamp
assembly.
7. Remove the bulb by pulling it straight out.
8. Push the new bulb into the socket.
9. Reinstall the bulb socket by turning it clockwise into the lamp assembly.
10. Reverse Steps 1–5 to reinstall the taillamp assembly and applique.
Center High-Mounted Stoplamp
(CHMSL)
The Center High-Mounted Stoplamp (CHMSL)
is above the rear doors at the center of the
vehicle.
To replace a bulb:
1. Remove the two screws from the CHMSLassembly.
2. Remove the CHMSL assembly.
3. Turn the bulb socket counterclockwise one-quarter turn to remove it from the
lamp assembly.
4. Pull the old bulb straight out of the socket and push the new bulb into the
socket.
5. Turn the bulb socket clockwise one-quarter turn to install it in the lamp
assembly.
6. Reinstall the CHMSL assembly and two screws.
Do not block or damage the CHMSL when
items are loaded on the roof of the vehicle.
License Plate Lamp
1. Bulb Socket
2. License Plate Bulb Assembly
3. Screws
To replace one of these bulbs: 1. Remove the screws (3) that secure the license plate bulb assembly (2).
2. Turn the bulb socket (1) counterclockwise and pull the bulb straight out of the
socket.
3. Install the new bulb.
4. Reverse Steps 1 and 2 to reinstall the license plate bulb assembly.