wheel GMC SAVANA 2020 Owner's Guide

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
190 Driving and Operating
How the System Works
LDW utilizes a camera sensor
installed on the windshield ahead of
the rearview mirror to detect lane
markings.
To turn LDW on and off, press
@on
the instrument panel to the left of
the steering wheel. The control
indicator will light when LDW is on.
When LDW is on,
@is green if LDW
is available to warn of a lane
departure. If the vehicle crosses a
detected lane marking without using
the turn signal in that direction,
@
changes to amber and flashes.
Additionally, there will be three
beeps on the right or left, depending
on the lane departure direction.
LDW will not alert if the turn signal
is active in the direction of lane
departure, or if LDW detects that
you are accelerating, braking or
actively steering.
When the System Does Not
Seem to Work Properly
The system may not detect lanes as
well when there are:
. Close vehicles ahead.
. Sudden lighting changes, such
as when driving through tunnels.
. Banked roads.
If the LDW system is not functioning
properly when lane markings are
clearly visible, cleaning the
windshield may help.
LDW alerts may occur due to tar
marks, shadows, cracks in the road,
temporary or construction lane
markings, or other road
imperfections. This is normal system
operation; the vehicle does not need
service. Turn LDW off if these
conditions continue.
Fuel
Top Tier Fuel
GM recommends the use of TOP
TIER Detergent Gasoline to keep
the engine clean, reduce engine
deposits, and maintain optimal
vehicle performance. Look for the
TOP TIER Logo or see
www.toptiergas.com for a list of TOP
TIER Detergent Gasoline marketers
and applicable countries.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
Driving and Operating 197
tires, and mirrors. SeeTowing
Equipment 0207. If the trailer has
electric brakes, start the
combination moving and then
manually apply the trailer brake
controller to check the trailer brakes
work. During the trip, occasionally
check that the cargo and trailer are
secure and that the lamps and any
trailer brakes are working.
Towing with a Stability Control
System
When towing, the stability control
system might be heard. The system
reacts to vehicle movement caused
by the trailer, which mainly occurs
during cornering. This is normal
when towing heavier trailers.
Following Distance
Stay at least twice as far behind the
vehicle ahead as you would when
driving without a trailer. This can
help to avoid heavy braking and
sudden turns.
Passing
More passing distance is needed
when towing a trailer. The
combination of the vehicle and
trailer will not accelerate as quickly
and is much longer than the vehicle
alone. It is necessary to go much
farther beyond the passed vehicle
before returning to the lane. Pass
on level roadways. Avoid passing
on hills if possible.
Backing Up
Hold the bottom of the steering
wheel with one hand. To move the
trailer to the left, move that hand to
the left. To move the trailer to the
right, move that hand to the right.
Always back up slowly and,
if possible, have someone
guide you.
Making Turns
Caution
Turn more slowly and make wider
arcs when towing a trailer to
prevent damage to your vehicle.
Making very sharp turns could
cause the trailer to contact the
vehicle.
Make wider turns than normal when
towing, so trailer will not go over soft
shoulders, over curbs, or strike road
signs, trees, or other objects.
Always signal turns well in advance.
Do not steer or brake suddenly.
Driving on Grades
Reduce speed and shift to a lower
gear before starting down a long or
steep downhill grade. If the
transmission is not shifted down, the
brakes may overheat and result in
reduced braking efficiency.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
198 Driving and Operating
The vehicle can tow in D (Drive).
Shift the transmission to a lower
gear if the transmission shifts too
often under heavy loads and/or hilly
conditions.
When towing at higher altitudes,
engine coolant will boil at a lower
temperature than at lower altitudes.
If the engine is turned off
immediately after towing at high
altitude on steep uphill grades, the
vehicle could show signs similar to
engine overheating. To avoid this,
let the engine run, preferably on
level ground, with the transmission
in P (Park) for a few minutes before
turning the engine off. If the
overheat warning comes on, see
Engine Overheating0234.
Parking on Hills
{Warning
To prevent serious injury or death,
always park your vehicle and
trailer on a level surface when
possible. When parking your vehicle and your
trailer on a hill:
1. Press the brake pedal, but do not shift into P (Park) yet. Turn
the wheels into the curb if
facing downhill or into traffic if
facing uphill.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, gradually release the
brake pedal to allow the chocks
to absorb the load of the trailer.
4. Reapply the brake pedal. Then apply the parking brake and
shift into P (Park).
5. Release the brake pedal.
Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
.Start the engine.
. Shift into a gear.
. Release the parking brake.
2. Let up on the brake pedal. 3. Drive slowly until the trailer is
clear of the chocks.
4. Stop and have someone pick up and store the chocks
Launching and Retrieving
a Boat
Backing the Trailer into the Water
{Warning
.Have all passengers get out
of the vehicle before
backing onto the sloped part
of the ramp. Lower the
driver and passenger side
windows before backing
onto the ramp. This will
provide a means of escape
in the unlikely event the
vehicle slides into the water.
. If the boat launch surface is
slippery, have the driver
remain in the vehicle with
the brake pedal applied
while the boat is being
launched. The boat launch
(Continued)

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
Driving and Operating 199
Warning (Continued)
can be especially slippery at
low tide when part of the
ramp was previously
submerged at high tide. Do
not back onto the ramp to
launch the boat if you are
not sure the vehicle can
maintain traction.
. Do not move the vehicle if
someone is in the path of
the trailer. Some parts of the
trailer might be underwater
and not visible to people
who are assisting in
launching the boat.
Disconnect the wiring to the trailer
before backing the trailer into the
water to prevent damage to the
electrical circuits on the trailer.
Reconnect the wiring to the trailer
after removing the trailer from the
water. If the trailer has electric
brakes that can function when the
trailer is submerged, it might help to leave the electrical trailer connector
attached to maintain trailer brake
functionality while on the boat ramp.
To back the trailer into the water:
1. Slowly back down the boat ramp until the boat is floating,
but no further than necessary.
2. Press and hold the brake pedal, but do not shift into
P (Park) yet.
3. Have someone place chocks under the front wheels of the
vehicle.
4. Gradually release the brake pedal to allow the chocks to
absorb the load of the trailer.
5. Reapply the brake pedal. Then apply the parking brake and
shift into P (Park).
6. Release the brake pedal.
Pulling the Trailer from the Water
To pull the trailer from the water: 1. Press and hold the brake pedal. 2. Start the engine and shift into
a gear.
3. Release the parking brake.
4. Let up on the brake pedal.
5. Drive slowly until the tires are clear of the chocks.
6. Stop and have someone pick up and store the chocks.
7. Slowly pull the trailer from the water.
Caution
If the vehicle tires begin to spin
and the vehicle begins to slide
toward the water, remove your
foot from the accelerator pedal
and apply the brake pedal. Seek
help to have the vehicle towed up
the ramp.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
Driving and Operating 203
Tow Rating Chart
VehicleAxle Ratio Maximum Trailer Weight GCWR (a)
G2500 Cargo Van 2WD Short Wheelbase 4.3L V6 3.423 357 kg (7,400 lb) 5 897 kg (13,000 lb)
6.0L V8 3.424 536 kg (10,000 lb) 7 258 kg (16,000 lb)
G2500 Cargo Van 2WD Long Wheelbase 4.3L V6 3.423 220 kg (7,100 lb) 5 897 kg (13,000 lb)
6.0L V8 3.424 536 kg (10,000 lb) 7 258 kg (16,000 lb)
G2500 Passenger Van 2WD Short Wheelbase 4.3L V6 3.423 039 kg (6,700 lb) 5 897 kg (13,000 lb)
6.0L V8 3.424 355 kg (9,600 lb) 7 258 kg (16,000 lb)
G3500 Cargo Van 2WD Short Wheelbase
4.3L V6 3.423 357 kg (7,400 lb) 5 897 kg (13,000 lb)
6.0L V8 3.424 536 kg (10,000 lb) 7 258 kg (16,000 lb)
G3500 Cargo Van 2WD Long Wheelbase 4.3L V6 3.423 265 kg (7,200 lb) 5 897 kg (13,000 lb)
6.0L V8 3.424 536 kg (10,000 lb) 7 258 kg (16,000 lb)
G3500 Passenger Van 2WD Short Wheelbase 4.3L V6 3.423 039 kg (6,700 lb) 5 897 kg (13,000 lb)

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
204 Driving and Operating
Tow Rating Chart (cont'd)
VehicleAxle Ratio Maximum Trailer Weight GCWR (a)
6.0L V8 3.424 355 kg (9,600 lb) 7 258 kg (16,000 lb)
G3500 Passenger Van 2WD Long Wheelbase 4.3L V6 3.422 858 kg (6,300 lb) 5 897 kg (13,000 lb)
6.0L V8 3.424 173 kg (9,200 lb) 7 258 kg (16,000 lb)
3500 Series Cutaway –353 cm (139 in) Wheelbase
4.3L V6 3.42/3.73(b)5 897 kg (13,000 lb)
6.0L V8 3.42/3.73(b)7 258 kg (16,000 lb)
3500 Series Cutaway –404 cm (159 in) Wheelbase
4.3L V6 3.42/3.73(b)5 897 kg (13,000 lb)
6.0L V8 3.42/3.73(b)7 258 kg (16,000 lb)
6.0L V8
(5 579 kg (12,300 lb) GVWR) 4.10
(b)8 618 kg (19,000 lb)
6.0L V8
(6 441 kg (14,200 lb) GVWR) 4.10
(b)9 072 kg (20,000 lb)
3500 Series Cutaway –450 cm (177 in) Wheelbase
6.0L V8 3.42/3.73(b)7 258 kg (16,000 lb)
6.0L V8
(5 579 kg (12,300 lb) GVWR) 4.10
(b)8 618 kg (19,000 lb)

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
Driving and Operating 211
sway is increasing, the vehicle
brakes are selectively applied at
each wheel, to help reduce
excessive trailer sway. If equipped
with the Integrated Trailer Brake
Control (ITBC) system, and the
trailer has an electric brake system,
StabiliTrak/ESC may also apply the
trailer brakes.
If TSC is enabled, the Traction
Control System (TCS)/StabiliTrak/
ESC warning light will flash on the
instrument cluster. Reduce vehicle
speed by gradually removing your
foot from the accelerator. If trailer
sway continues, StabiliTrak/ESC
can reduce engine torque to help
slow the vehicle. TSC will not
function if StabiliTrak/ESC is turned
off. SeeTraction Control/Electronic
Stability Control 0177.
{Warning
Trailer sway can result in a crash
and in serious injury or death,
even if the vehicle is equipped
with TSC.
If the trailer begins to sway,
reduce vehicle speed by
gradually removing your foot from
the accelerator. Then pull over to
check the trailer and vehicle to
help correct possible causes,
including an improperly or
overloaded trailer, unrestrained
cargo, improper trailer hitch
configuration, or improperly
inflated or incorrect vehicle or
trailer tires. See Towing
Equipment 0207 for trailer ratings
and hitch setup
recommendations.
Trailer Tires
Special Trailer (ST) tires differ from
vehicle tires. Trailer tires are
designed with stiff sidewalls to help
prevent sway and to support heavy
loads. These features can make it
difficult to determine if the trailer tire
pressures are low only based on a
visual inspection.
Always check all trailer tire
pressures before each trip when the
tires are cool. Low trailer tire
pressure is a leading cause of trailer
tire blow-outs.
Trailer tires deteriorate over time.
The trailer tire sidewall will show the
week and year the tire was
manufactured. Many trailer tire
manufacturers recommend
replacing tires more than six
years old.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
Vehicle Care 213
Vehicle Care
General Information
General Information . . . . . . . . . . 214
California Proposition65 Warning . . . . . . . . . . . . . . . . . 214
California Perchlorate Materials Requirements . . . . . 215
Accessories and Modifications . . . . . . . . . . . . . . . . 215
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 215
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 216
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 217
Engine Oil . . . . . . . . . . . . . . . . . . . . 221
Engine Oil Life System . . . . . . . 223
Automatic Transmission Fluid (6-Speed Transmission) . . . . . 224
Automatic Transmission Fluid (8-Speed Transmission) . . . . . 227
Engine Air Cleaner/Filter . . . . . . 228
Cooling System . . . . . . . . . . . . . . 229
Engine Overheating . . . . . . . . . . 234
Engine Fan . . . . . . . . . . . . . . . . . . . 235
Power Steering Fluid . . . . . . . . . 235
Washer Fluid . . . . . . . . . . . . . . . . . 236 Brakes . . . . . . . . . . . . . . . . . . . . . . . 237
Brake Fluid . . . . . . . . . . . . . . . . . . . 238
Battery - North America . . . . . . 239
Rear Axle . . . . . . . . . . . . . . . . . . . . 240
Noise Control System . . . . . . . . 240
Starter Switch Check . . . . . . . . . 241
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 242
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . 242
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 242
Wiper Blade Replacement . . . . 243
Windshield Replacement . . . . . 243
Headlamp Aiming
Front Headlamp Aiming . . . . . . 244
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 244
Halogen Bulbs . . . . . . . . . . . . . . . . 244
Front Turn Signal, Sidemarker, and Parking Lamps . . . . . . . . . 244
Taillamps . . . . . . . . . . . . . . . . . . . . . 245
Center High-Mounted Stoplamp (CHMSL) . . . . . . . . . 246
License Plate Lamp . . . . . . . . . . 247
Electrical System
Electrical System Overload . . . 247 Fuses and Circuit Breakers . . . 248
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 248
Floor Console Fuse Block . . . . 252
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 254
All-Season Tires . . . . . . . . . . . . . . 255
Winter Tires . . . . . . . . . . . . . . . . . . 255
Tire Sidewall Labeling . . . . . . . . 256
Tire Designations . . . . . . . . . . . . . 258
Tire Terminology and Definitions . . . . . . . . . . . . . . . . . . 259
Tire Pressure . . . . . . . . . . . . . . . . . 262
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 263
Tire Pressure Monitor
Operation . . . . . . . . . . . . . . . . . . . 264
Tire Inspection . . . . . . . . . . . . . . . . 267
Tire Rotation . . . . . . . . . . . . . . . . . 267
Dual Tire Rotation . . . . . . . . . . . . 269
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 269
Buying New Tires . . . . . . . . . . . . . 270
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 271
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 272
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 273
Wheel Replacement . . . . . . . . . . 273

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
Vehicle Care 237
Caution
.Do not use washer fluid that
contains any type of water
repellent coating. This can
cause the wiper blades to
chatter or skip.
. Do not use engine coolant
(antifreeze) in the
windshield washer. It can
damage the windshield
washer system and paint.
. Do not mix water with
ready-to-use washer fluid.
Water can cause the
solution to freeze and
damage the washer fluid
tank and other parts of the
washer system.
. When using concentrated
washer fluid, follow the
manufacturer instructions for
adding water.
. Fill the washer fluid tank
only three-quarters full when
it is very cold. This allows
(Continued)
Caution (Continued)
for fluid expansion if
freezing occurs, which could
damage the tank if it is
completely full.
Brakes
Disc brake pads have built-in wear
indicators that make a high-pitched
warning sound when the brake pads
are worn and new pads are needed.
The sound can come and go or can
be heard all the time when the
vehicle is moving, except when
applying the brake pedal firmly.
{Warning
The brake wear warning sound
means that soon the brakes will
not work well. That could lead to
a crash. When the brake wear
warning sound is heard, have the
vehicle serviced.
Caution
Continuing to drive with worn-out
brake pads could result in costly
brake repair.
Some driving conditions or climates
can cause a brake squeal when the
brakes are first applied or lightly
applied. This does not mean
something is wrong with the brakes.
Properly torqued wheel nuts are
necessary to help prevent brake
pulsation. When tires are rotated,
inspect brake pads for wear and
evenly tighten wheel nuts in the
proper sequence to torque
specifications. See Capacities and
Specifications 0317.
Brake pads should be replaced as
complete sets.
Brake Pedal Travel
See your dealer if the brake pedal
does not return to normal height,
or if there is a rapid increase in
pedal travel. This could be a sign
that brake service may be required.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-13882574) -
2020 - CRC - 11/1/19
250 Vehicle Care
FusesUsage
19 Engine control module battery
20 Left stop/turn cutaway lamp
21 Left stop/turn trailer lamp
22 Right stop/turn cutaway lamp
23 –
24 Fuel pump
25 Auxiliary power outlet
26 Body control module 3
27 Special equipment option
28 Airbag
29 Steering wheel sensor
30 Engine control module/Ignition Fuses
Usage
31 Transmission control module
Ignition
32 Transmission control module 1
battery
33 Rear parking aid module
34 –
35 –
36 Fuel system control module battery
41 Transmission control module 2,
battery signal
42 Trailer wiring
43 –
44 Starter solenoid
45 Engine control module, powertrain
signal 2
46 DC-AC inverter
47 – Fuses
Usage
51 Left high-beam headlamp
52 Right high-beam headlamp
53 Left low-beam headlamp
54 Right low-beam headlamp
55 Wipers
56 Canister vent solenoid
58 Body control module 2
59 Body control module 1
61 Engine oil solenoid
62 O2 sensor 2
63 –
64 Mass airflow/ Canister vent
65 Ignition coils/ injectors - odd