towing CHEVROLET EXPRESS CARGO VAN 2016 1.G CNG Manual

Chevrolet/GMC Express/Savana CNG Compressed Natural Gas Supplement
(GMNA-Localizing-U.S/Canada-9159237) - 2016 - crc - 6/18/15
Driving and Operating 5
Driving and
Operating
Driving Information
Vehicle Load Limits . . . . . . . . . . . . . 5
Starting and Operating
Starting the Engine . . . . . . . . . . . . . . 5
Fuel
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Filling the Tank . . . . . . . . . . . . . . . . . . 7
Fuel System Leak . . . . . . . . . . . . . 10
Trailer Towing
Trailer Towing . . . . . . . . . . . . . . . . . . 13
Driving Information
Vehicle Load Limits
Caution
Loose items stored in the cargo
area may damage the fuel tank
and fuel system components.
Secure all items in the cargo area
to avoid shifting and any damage
to the fuel tank and fuel tank
components.
Starting and
Operating
Starting the Engine
Starting the engine in a CNG
vehicle is similar to starting a
gasoline engine. See“Starting the
Engine” in the owner manual.
Cold Weather Starting
If the outside temperature is below
−20 °C (−4 °F), the engine may be
harder to start, or may not start until
the temperature increases.
Using the engine heater may make
it easier to start. See “Engine
Heater” in the owner manual.
High Altitude Cold Starting
An engine is harder to start in cold
weather. The thinner air found
above 1 600 m (5,000 ft) also makes
the vehicle harder to start. The
unique properties of CNG make it
even more difficult or impossible to
start at high altitudes if

Chevrolet/GMC Express/Savana CNG Compressed Natural Gas Supplement
(GMNA-Localizing-U.S/Canada-9159237) - 2016 - crc - 6/18/15
Driving and Operating 13
Trailer Towing
{Warning
The trailer hitch protects the CNG
tank in a crash and from road
hazards. Damage may result in a
rupture or explosion of the CNG
tank. You or others could be
injured or even killed. If the trailer
hitch must be removed for any
reason, e.g., tank inspection or
vehicle repair, always reinstall the
trailer hitch before operating the
vehicle.
The compressed natural gas system
adds approximately 363 kg (800 lb)
of weight to the vehicle. This must
be included when determining the
maximum load and trailer towing
capacity for the vehicle as described
in the owner manual.

Chevrolet/GMC Express/Savana CNG Compressed Natural Gas Supplement
(GMNA-Localizing-U.S/Canada-9159237) - 2016 - crc - 6/18/15
14 Vehicle Care
Vehicle Care
General Information
Accessories andModifications . . . . . . . . . . . . . . . . . 14
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . . . 15
Fuel System Components . . . . . 15
Wheels and Tires
Tire Changing . . . . . . . . . . . . . . . . . 17
Jump Starting
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . 17
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . . . 18
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . 18
General Information
Accessories and
Modifications
Do not add accessories to the CNG
or gasoline circuits. Do not cut or
splice any wire harness to add
accessories.
Adding accessories or making
modifications to the vehicle,
including to the CNG tank shields,
could cause a malfunction or
damage and would not be covered
by the vehicle warranty. The CNG
fuel tanks under the vehicle are
protected by tank shields. If the
vehicle has a CNG fuel tank in the
cargo area, it is covered with a
shield.
{Warning
To help avoid damage to the CNG
tanks and to reduce the risk of
explosion, tank shields must be
present. Do not attach
accessories, such as racks or
(Continued)
Warning (Continued)
bins, to the shield. Do not drill,
modify, or use shields as a work
surface. Do not use fire near
shields or tanks.
If a CNG tank needs service or
repair, have only a qualified
technician perform the work. See
“Accessories and Modifications” in
the owner manual.

Chevrolet/GMC Express/Savana CNG Compressed Natural Gas Supplement
(GMNA-Localizing-U.S/Canada-9159237) - 2016 - crc - 6/18/15
Vehicle Care 17
The manual shutoff valve is on the
inner side of the driver side frame
rail halfway between the front and
rear tires.
A label is on the outside of the
vehicle above the manual shutoff
valve. Do not remove this label.
To turn off the valve, turn the lever
one-quarter turn clockwise. Turn it
counterclockwise to turn the valve
back on.
Turn off the valve if a fuel leak is
suspected or if the vehicle is
involved in an accident. This valve,
when turned, will stop CNG flow to
the engine. If the vehicle has just
been in storage and it will not start,
verify that the valve is turned to the
on position.Wheels and Tires
Tire Changing
This vehicle does not have a spare
tire. SeeTowing the Vehicle 018.
Jump Starting
Jump Starting - North
America
{Warning
If the CNG fuel system has a
leak, a spark from the jumper
cables could ignite the natural
gas, causing injury or death. Do
not jump start the vehicle if you
smell a persistent natural gas
odor or hear a continual hissing
sound. Close the manual shutoff
valve, and have the vehicle towed
to an authorized GM dealer for
service. See Fuel System
Components 015.
See “Jump Starting - North America”
in the owner manual.

Chevrolet/GMC Express/Savana CNG Compressed Natural Gas Supplement
(GMNA-Localizing-U.S/Canada-9159237) - 2016 - crc - 6/18/15
18 Vehicle Care
Towing the Vehicle
{Warning
Improperly positioned tow straps,
hooks, or chains can damage the
CNG fuel system and cause a
leak. If leaking gas catches fire, it
could cause injury or death. To
avoid damage, always flatbed on
a car carrier.
See the owner manual for more
information on towing the disabled
vehicle.
Appearance Care
Exterior Care
Finish Damage
{Warning
Heating the vehicle to above 82 °
C (180 °F) may damage the
Compressed Natural Gas (CNG)
tanks and may cause the fuel
pressure relief device to open and
release CNG. If an ignition source
is present, this could create a risk
of fire or explosion.
CNG tank(s) must be drained by
a qualified technician prior to heat
curing a painted body repair.

Chevrolet/GMC Express/Savana CNG Compressed Natural Gas Supplement
(GMNA-Localizing-U.S/Canada-9159237) - 2016 - crc - 6/18/15
Index 29
N
Natural GasVehicle Service Records . . . . . . . . 21
Natural Gas Vehicle (CNG) Service Records . . . . . . . . . . . . . . . 21
P
Proposition 65 Warning,
California . . . . . . . . . . . . . . . . . . . . . . . 17
S
ServiceAccessories andModifications . . . . . . . . . . . . . . . . . . 14
Doing Your Own Work . . . . . . . . . . 15
Engine Soon Light . . . . . . . . . . . . . . . 3
Service and Maintenance Natural Gas Vehicle (CNG)Service Records . . . . . . . . . . . . . . 21
Specifications and Capacities . . . . 27
Starting the Engine . . . . . . . . . . . . . . . 5
Supplement Using . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
T
TiresChanging . . . . . . . . . . . . . . . . . . . . . . . 17
Towing Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 18 Trailer
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . 13
U
Using This Supplement . . . . . . . . . . . 2
V
Vehicle
Canadian Owners . . . . . . . . . . . . . . . 2
Load Limits . . . . . . . . . . . . . . . . . . . . . . 5
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . 18