
GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
Vehicle Care 199
Headlamp Wiring
An electrical overload may cause the lamps
to go on and off, or in some cases to
remain off. Have the headlamp wiring
checked right away if the lamps go on and
off or remain off.
Windshield Wipers
If the wiper motor overheats due to heavy
snow or ice, the windshield wipers will stop
until the motor cools and will then restart.
Although the circuit is protected from
electrical overload, overload due to heavy
snow or ice may cause wiper linkage
damage. Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an electrical
problem and not snow or ice, be sure to get
it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are
protected from short circuits by a
combination of fuses and circuit breakers.
This greatly reduces the chance of damage
caused by electrical problems.
{Danger
Fuses and circuit breakers are marked
with their ampere rating. Do not exceed
the specified amperage rating when
replacing fuses and circuit breakers. Use
of an oversized fuse or circuit breaker can
result in a vehicle fire. You and others
could be seriously injured or killed.
{Warning
Installation or use of fuses that do not
meet GM’s original fuse specifications is
dangerous. The fuses could fail, and result
in a fire. You or others could be injured
or killed, and the vehicle could be
damaged.
See Accessories and Modifications 0173 and
General Information 0173.
To check or replace a blown fuse, see
Electrical System Overload 0198.
Engine Compartment Fuse Block
The fuse block is in the engine compartment
on the driver side of the vehicle.
Vehicles with Upfitter Content
See www.gmupfitter.com for upfitter
provisions and best practices.
Caution
Spilling liquid on any electrical
component on the vehicle may damage
it. Always keep the covers on any
electrical component.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
202 Vehicle Care
FusesUsage
70 Upfitter Stoplamps 71 Fuel Heater/FlexFuel Sensor
72 Body Control Module 6
73 Lighter/Data Link Connector
74 Front Blower 75 Engine Control Module
76 Soot Sensors (Diesel Only)
77 O2 Sensor 1
78 Engine Control Module/ Powertrain Signal 1
79 Ignition Coils/Injectors –Even
Relays Usage
15 Run/Crank
37 NOX Sensor (Diesel Only)
38 Fuel Pump
39 Crank Relays
Usage
40 A/C Compressor 48 Electro Viscous Fan Clutch (Diesel Only)
49 Powertrain 50 –
57 Fan Low Speed
60 Fan Control
Auxiliary Fuse Block
This component is near the fuse block in the
engine compartment Fuses Usage
MR-1 Upfitter 1
MR-2 Upfitter 2
MR-3 Upfitter Power Control
Relays Usage
MR Rel 1 Upfitter 1
MR Rel 2 Upfitter 2

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
Vehicle Care 203
Floor Console Fuse Block
The floor console fuse block is under the driver seat.
The vehicle may not be equipped with all of
the fuses, relays, and features shown.Mini-Fuses Usage
F1 –
F2 Steering Wheel Sensor
F3 Auxiliary Parking Lamps
F4 Front Parking Lamps F5 Trailer Parking Lamps
F6 Upfitter/Parking Lamps F7 Right Rear Parking Lamp
F8 Left Rear Parking Lamp
F9 Outside View Mirror Switch/Front Camera
Module
F10 Airbag/Automatic Occupant Sensing
F11 –/OnStar
F12 –
F13 HVAC 2
F14 HVAC 1 F15 Reflected LED Display
F16 Upfitter Aux 1/Gas Ambulance

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
204 Vehicle Care
Mini-FusesUsage
F17 Heated Outside Mirrors
F18 Rear Window Defogger
F19 Compass
F20 Radio/Chime/SiriusXM Satellite Radio
F21 Remote Function Actuator/Tire Pressure
Monitor
F22 Ignition Switch/Discrete Logic Ignition Sensor/
Pass Key 3
F23 Instrument Cluster
F24 –
F25 HVAC Control
F26 Auxiliary/Trailer Reverse Lamps
F27 Reverse Tail Lamps
F28 Upfitter 2/Gas Ambulance
F29 Rear Blower
F30 Upfitter/Courtesy Lamps Mini-Fuses
Usage
F31 Front Door Lock
F32 Rear Door Lock
F33 Cargo Door Unlock
F34 Front Passenger Door Unlock
F35 Rear Passenger Door Unlock
F36 Driver Door Unlock F37 –
F38 –
Relays Usage
K1 Run
K2 –
K3 Parking Lamps
K4 Upfitter 2 K5 Rear Window Defogger
K6 Retained Accessory Power
Circuit Breakers Usage CB1 Power Seats Circuit Breakers Usage
CB2 Power Windows
Wheels and Tires
Tires
Every new GM vehicle has high-quality
tires made by a leading tire
manufacturer. See the warranty manual
for information regarding the tire
warranty and where to get service. For
additional information refer to the tire
manufacturer.
{Warning
.Poorly maintained and improperly
used tires are dangerous.
.Overloading the tires can cause
overheating as a result of too
much flexing. There could be a
blowout and a serious crash. See
Vehicle Load Limits 0126.
(Continued)

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
Vehicle Care 219
Different Size Tires and Wheels
If wheels or tires are installed that are a
different size than the original equipment
wheels and tires, vehicle performance,
including its braking, ride and handling
characteristics, stability, and resistance to
rollover may be affected. If the vehicle has
electronic systems such as antilock brakes,
rollover airbags, traction control, electronic
stability control, or All-Wheel Drive, the
performance of these systems can also be
affected.
{Warning
If different sized wheels are used, there
may not be an acceptable level of
performance and safety if tires not
recommended for those wheels are
selected. This increases the chance of a
crash and serious injury. Only use GM
specific wheel and tire systems developed
for the vehicle, and have them properly
installed by a GM certified technician.
See Buying New Tires 0217 and
Accessories and Modifications 0173.
Uniform Tire Quality Grading
The following information relates to the
system developed by the United States
National Highway Traffic Safety
Administration (NHTSA), which grades
tires by treadwear, traction, and
temperature performance. This applies
only to vehicles sold in the United
States. The grades are molded on the
sidewalls of most passenger car tires.
The Uniform Tire Quality Grading
(UTQG) system does not apply to deep
tread, winter tires, compact spare tires,
tires with nominal rim diameters of
10 to 12 inches (25 to 30 cm), or to some
limited-production tires.
While the tires available on General
Motors passenger cars and light trucks
may vary with respect to these grades,
they must also conform to federal
safety requirements and additional
General Motors Tire Performance
Criteria (TPC) standards. Quality grades can be found where
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:
Treadwear 200 Traction AA Temperature A
All Passenger Car Tires Must Conform to
Federal Safety Requirements In Addition
To These Grades.
Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the
tire when tested under controlled
conditions on a specified government
test course. For example, a tire graded
150 would wear one and one-half (1½)
times as well on the government course
as a tire graded 100. The relative
performance of tires depends upon the
actual conditions of their use, however,
and may depart significantly from the
norm due to variations in driving habits,
service practices and differences in road
characteristics and climate.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
222 Vehicle Care
slowly. But if there is ever a blowout, here
are a few tips about what to expect and
what to do:
If a front tire fails, the flat tire creates a
drag that pulls the vehicle toward that side.
Take your foot off the accelerator pedal and
grip the steering wheel firmly. Steer to
maintain lane position, and then gently
brake to a stop, well off the road,
if possible.
A rear blowout, particularly on a curve, acts
much like a skid and may require the same
correction as used in a skid. Stop pressing
the accelerator pedal and steer to straighten
the vehicle. It may be very bumpy and
noisy. Gently brake to a stop, well off the
road, if possible.
{Warning
Driving on a flat tire will cause
permanent damage to the tire.
Re-inflating a tire after it has been driven
on while severely underinflated or flat
may cause a blowout and a serious crash.
Never attempt to re-inflate a tire that has
been driven on while severely(Continued)
Warning (Continued)
underinflated or flat. Have your dealer or
an authorized tire service center repair or
replace the flat tire as soon as possible.
{Warning
Lifting a vehicle and getting under it to
do maintenance or repairs is dangerous
without the appropriate safety equipment
and training. If a jack is provided with
the vehicle, it is designed only for
changing a flat tire. If it is used for
anything else, you or others could be
badly injured or killed if the vehicle slips
off the jack. If a jack is provided with the
vehicle, only use it for changing a
flat tire.
If a tire goes flat, avoid further tire and
wheel damage by driving slowly to a level
place, well off the road, if possible. Turn on
the hazard warning flashers. See Hazard
Warning Flashers 093.
{Warning
Changing a tire can be dangerous. The
vehicle can slip off the jack and roll over
or fall causing injury or death. Find a
level place to change the tire. To help
prevent the vehicle from moving:
1. Set the parking brake firmly.
2. Put an automatic transmission in P (Park) or a manual transmission in
1 (First) or R (Reverse).
3. Turn off the engine and do not restart while the vehicle is raised.
4. Do not allow passengers to remain in the vehicle.
5. Place wheel blocks, if equipped, on both sides of the tire at the opposite
corner of the tire being changed.
When the vehicle has a flat tire (2), use the
following example as a guide to assist in the
placement of the wheel blocks (1),
if equipped.

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
Vehicle Care 223
1. Wheel Block (If Equipped)
2. Flat Tire
The following information explains how to
repair or change a tire.
Tire Changing
Removing the Spare Tire and Tools
Equipment needed for a cargo van or a
passenger van is in the passenger side rear
corner of the vehicle.
Remove the retaining wing bolt and lift it
off of the mounting bracket.
Equipment needed for a 15-passenger seating
arrangement is secured on the rear floor on
the passenger side of the vehicle.Remove the retaining wing bolt and lift it
out of the mounting bracket to access the
equipment.
The tools you will be using include:

GMC Savana Owner Manual (GMNA-Localizing-U.S./Canada-15555961) -
2022 - CRC - 4/14/22
224 Vehicle Care
1. Jack
2. Hoist Handle
3. Extension(s)
4. Wheel Wrench
5. Jack Handle
The spare tire is mounted in the rear
underbody of the vehicle.
Use the hoist handle, extension(s), and the
wheel wrench to remove the
underbody-mounted spare tire.
To lower the spare tire from the vehicle:
1. Spare Tire
2. Tire/Wheel Retainer
3. Hoist Cable
4. Hoist Assembly5. Hoist Shaft
6. Hoist Handle and Extension(s)
7. Wheel Wrench
1. Assemble the wheel wrench (7) to the
hoist handle and the extension(s) (6).
2. Open the passenger side rear door.
3. Insert the chisel end of the hoist handle, on an angle, through the hole in the rear
floor panel above the bumper.
Be sure the hoist handle connects to the
hoist shaft. The chiseled end of the hoist
handle is used to lower the spare tire.
4. Turn the wheel wrench counterclockwise to lower the spare tire to the ground.
Continue to turn the wheel wrench until
the spare tire can be pulled out from
under the vehicle.
5. Pull the spare tire out from under the vehicle.6. Tilt the tire toward the vehicle withsome slack in the cable to access the
tire/wheel retainer.
Tilt the retainer and pull it through the
center of the wheel along with the cable
and spring.
For a vehicle that was completed from a
cab and chassis, refer to the information
from the body supplier/installer.
The spare tire is a full-size tire, like the
other tires on the vehicle.