2017 CHEVROLET LOW CAB FORWARD brake

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 227
the hills. When going up steep hills,
you may want to step on the
accelerator pedal to maintain your
speed. When going downhill, you
may have to brake or shift to a lower
gear to keep your speed down. Of
course, applying the brake takes
you out of cruise control. Many
drivers find this to be too much
trouble and do not use cruise
control on steep hills.
When Returning to Cruise Control
Driving
If you have canceled cruise control
under the following conditions, you
can return to the cruise control
driving condition before cancellation
when you operate and release the
cruise control resume switch. The
moment the resume switch is
released, the cruise set indicator
light comes on.
.When pressing the brake pedal.
. When the selector lever is
shifted to the N position.
When the vehicle speed decreases
to 30 km/h (19 MPH) or less for the
3.0L diesel, and 40 km/h (25 MPH) or less for the 5.2L diesel, it is not
possible to return to the cruise
control driving. You must reset the
cruise control.
If the cruise control is turned back
on while the vehicle speed exceeds
what is set prior to the cancellation
of cruise control, the set vehicle
speed cannot be changed until the
vehicle reaches to the set speed.
Also, the vehicle speed must be 1
MPH below the previously set
vehicle speed.
For the 5.2L diesel engine, if you
hold the switch at the +RES
position, the vehicle will keep going
faster until you release the switch or
apply the brake. So unless you want
to go faster, do not hold the switch
at the +RES position.
Exhaust Brake Function
Diesel Vehicles Equipped with
Exhaust Brake-interlocked Cruise
Automatic activation of the exhaust
brake during cruise control driving
suppresses an increase in the
speed on a downhill slope,
decreasing the need for the driver toapply the regular brake pedal. The
exhaust brake does not activate
when the exhaust brake switch is
turn off.
The maximum slope angle at which
the system can control the vehicle
speed increase is different
depending on the load the vehicle is
carrying.
Automatic Activation and
Automatic Release of Exhaust
Brake
The exhaust brake is engaged when
the vehicle speed exceeds the set
speed on a downhill slope.
The exhaust brake is disengaged
when the vehicle slows down close
to the set.
Cruise Control (Gas)
The cruise control function allows
you to drive the vehicle at a
constant speed without operating
the accelerator pedal. Use this
function when the vehicle speed is
between 48 and 117 km/h (30 and
73 MPH) (48 and 97 km/h (30 and
60 MPH) for vehicles equipped with

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 229
release the accelerator pedal, the
speed returns to the original set
vehicle speed.
When Increasing Vehicle Speed
When the cruise control resume
switch is operated, the speed
increases while the switch is held.
After the speed is increased to the
desired vehicle speed, and the
switch is released, the speed is set
at the increased vehicle speed.
If you want to increase the speed
quickly, press the accelerator pedal
and accelerate to the desired
vehicle speed. Then, operate the
cruise control set switch.When Increasing Vehicle Speed
Slightly
If the cruise control resume switch is
operated and released immediately,
the set vehicle speed increases
1.6 km/h (1 MPH) per operation.
This operation can be performed 6
times (3500 model) or 10 times
(4500 model) consecutively.
When Decreasing Vehicle Speed
When the cruise control set switch
is operated, the speed decreases
while the switch is held.
After the speed is decreased to the
desired vehicle speed, and the
switch is released, the speed is setat the decreased vehicle speed.
If you want to decrease the speed
quickly, press the brake pedal to
cancel cruise control and decelerate
to the desired vehicle speed. Then,
operate the cruise control set switch
When Decreasing Vehicle Speed
Slightly
If the cruise control set switch is
operated and released immediately,
the set vehicle speed decreases
1.6 km/h (1 MPH) per operation.
This operation can be performed 6
times (3500 model) or 10 times
(4500 model) consecutively.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
230 Driving and Operating
When Canceling Cruise Control
Press the cruise control main switch
again to turn the cruise control
system off. The cruise control main
indicator light will go out.
The cruise control set speed is
canceled in the following cases:
.When the brake pedal is
pressed.
. When the selector lever is
shifted to the N or 1st position.
. When cruising speed is
approximately 40 km/h (25 MPH)
or lower. .
When the vehicle speed
decreases more than 20% below
your set speed
(3500 model only).
. When the cruise control main
switch is turned off.
. When the engine control switch
is turned to the LOCK position.
. When trouble develops in the
system.
. Memory speed is eliminated.
When you do not use the cruise
control, be sure to place the cruise
control main switch into off.
When you place the engine control
switch into ACC, place the cruise
control main switch into off, then
reset the cruise control if you want
to use the cruise control again.
Using Cruise Control on Hills
How well your cruise control will
work on hills depends upon your
speed, load and the steepness of
the hills. When going up steep hills,
you may want to step on the
accelerator pedal to maintain your
speed. When going downhill, you may have to brake or shift to a lower
gear to keep your speed down. Of
course, applying the brake takes
you out of cruise control. Many
drivers find this to be too much
trouble and do not use cruise
control on steep hills.
When Returning to Cruise Control
Driving
If you have canceled cruise control
under the following conditions, you
can return to the cruise control
driving condition before cancellation
when you operate and release the
cruise control resume switch. The
moment the resume switch is
released, the cruise set indicator
light comes on.
.
When pressing the brake pedal.
. When the selector lever is
shifted to the N or 1st position.
When the vehicle speed decreases
to 30 km/h (19 MPH) or less, it is
not possible to return to the cruise
control driving. You must reset the
cruise control.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 231
For 3500 models, if the cruise
control is turned back on while the
vehicle speed exceeds what is set
prior to the cancellation of cruise
control, the set vehicle speed
cannot be changed until the vehicle
reaches to the set speed. Also, the
vehicle speed must be 1 MPH
below the previously set vehicle
speed.
For 4500 models, if you hold the
switch at the +RES position, the
vehicle will keep going faster until
you release the switch or apply the
brake. So unless you want to go
faster, do not hold the switch at the
+RES position.Driver Assistance
Systems
Speed Limiter (Gasoline
Vehicle)
Speed limiting restricts the vehicle's
speed by controlling the fuel
injection volume. It prevents the
speed from exceeding 105 km/h
(65 mph) regardless of the pressure
on the accelerator pedal.
Speed limiting does not control
braking, so it is possible for the
vehicle to exceed the set speed on
downhill slopes. If the tire size is
changed, the speed limiting may not
work normally. Be sure to use the
correct tire size specified for your
vehicle.
SeeCruise Control (Diesel) 0224 or
Cruise Control (Gas) 0227.
Fuel
Fuel (Gasoline)
Regular unleaded gasoline with a
posted octane rating of 87 or higher
should be used. It should meet
ASTMD4814 in the U.S. and CGSB
3.5-M87 in Canada. These fuels
should contain the proper additives
and in most cases nothing should
have to be added to the fuel. Pumps
in the U.S. and Canada will be
labeled UNLEADED. Only unleaded
nozzles will fit into this vehicle's
filler neck.
Gasoline with a posted octane
rating of less than 87 should not be
used in this vehicle. Using such
gasoline may cause a heavy
knocking noise when driving, which
can result in damage to the engine.
It is normal to hear a slight pinging
noise while accelerating or driving
up a hill. However, if a constant
knocking noise is heard while using
fuel rated at 87 octane or higher, the
engine should be serviced.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
238 Driving and Operating
2. Loosen the drain plug andmove the priming pump (1) up
and down by hand between
10 and 20 times.
3. Fully tighten the drain plug (2) and move the priming pump (1)
several times.
Fuel Filter (Engine-side)
1. Attach a plastic hose to the drain plug (2) on the bottom of
the engine-side fuel filter (1)
and put the other end of the
hose in a container placed
beneath the filter.
2. Loosen the drain plug andmove the priming pump up and
down by hand between 10 and
20 times.
3. Fully tighten the drain plug and move the priming pump several
times.
4. Test run the engine and check that there are no fuel leaks
from the drain plug of the
engine-side fuel filter. Also
check that the water separator
(fuel filter) warning light
stays off.
Running Out of Fuel
(Diesel)
When the Fuel Tank is Empty
When the fuel tank is empty, air will
enter the fuel system, so refueling
alone will not be enough to restart
the engine. Use the following
methods to bleed the fuel system.
Bleeding the Fuel System
Steps for Refueling
1. Follow the directions in "Parking Brake Lever" under
Parking Brake 0221.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 243
Optional PTO switches are available
from your dealer to ease installation
of a PTO.
The optional PTO main switch and
PTO engine speed control switch
can be used increase the engine
idle r/min without additional
programming. Pressing the PTO
main switch once will activate the
PTO mode and raise the idle up
speed up to the preset 800 r/min.
Once in PTO mode the PTO engine
speed control switch can be used to
adjust the idle speeds between the
preset 1,300 and 1,700 r/min.
Moving the selector lever from park
or neutral, applying the brake pedal
or releasing the parking brake will
cancel PTO mode and return the
engine idle speed to normal. For
additional details about PTO
programming, contact your dealer.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
244 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 245
California Proposition65 Warning . . . . . . . . . . . . . . . . . 245
California Perchlorate Materials Requirements . . . . . 245
Accessories and Modifications . . . . . . . . . . . . . . . . 245
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 245
Cab Tilting . . . . . . . . . . . . . . . . . . . . 247
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 249
Engine Cover . . . . . . . . . . . . . . . . . 250
Engine Oil (Diesel) . . . . . . . . . . . 251
Engine Oil (Gasoline) . . . . . . . . . 257
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 260
Engine Air Cleaner/Filter . . . . . . 263
Engine Coolant . . . . . . . . . . . . . . . 263
Engine Overheating . . . . . . . . . . 269
Power Steering Fluid . . . . . . . . . 273
Washer Fluid . . . . . . . . . . . . . . . . . 274
Brakes . . . . . . . . . . . . . . . . . . . . . . . 275
Brake Fluid . . . . . . . . . . . . . . . . . . . 280
Battery . . . . . . . . . . . . . . . . . . . . . . . . 281 Fuel Filter . . . . . . . . . . . . . . . . . . . . 282
Rear Axle (Gear Oil Viscosity
Chart) . . . . . . . . . . . . . . . . . . . . . . . 283
Rear Axle (Oil Level Check) . . . . . . . . . . . . . . . . . . . . . . 283
Noise Control System . . . . . . . . 284
Automatic Transmission Shift Lock Control Function Check
(Diesel Only) . . . . . . . . . . . . . . . . 285
Wiper Blade Replacement . . . . 286
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 288
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 288
Headlamps and Front Turn Signal . . . . . . . . . . . . . . . . . . . . . . . 291
Roofmarker Lamps . . . . . . . . . . . 295
Sidemarker Lamps (Including Turn Signal and Cornering
Lamps) . . . . . . . . . . . . . . . . . . . . . . 295
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 297
License Plate Lamp . . . . . . . . . . 297
Interior Lamps . . . . . . . . . . . . . . . . 298
Electrical System
Electrical System Overload . . . 298
Wheels and Tires
Wheels and Tires . . . . . . . . . . . . . 308
Tire Pressure . . . . . . . . . . . . . . . . . 322
Tire Rotation . . . . . . . . . . . . . . . . . 323
If a Tire Goes Flat . . . . . . . . . . . . 326
Jump Starting
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . 326
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . 332
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . 334
Interior Care . . . . . . . . . . . . . . . . . . 340

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
246 Vehicle Care
Warning (Continued)
vehicle or its equipment. If you
have any questions about
carrying out some service, have
the work done by a skilled
technician.
To prevent personal injury, keep
hands, tools and clothing clear of
the engine cooling fan when the
engine is running.
The engine, exhaust pipe and
radiator will be hot immediately
after the vehicle is driven. Be
careful around these parts to
prevent burns. Perform all checks
when the engine is cold.
Do not perform work near an
open flame or other heat sources.
Do not let the engine run in poorly
ventilated garages or sheds. This
could cause carbon monoxide
poisoning.(Continued)
Warning (Continued)
Performing maintenance work on
a truck or chassis can be
dangerous. In trying to do some
jobs, you can be seriously injured.
Do your own maintenance work
only if you have the required
know-how and the proper tools
and equipment for the job. If you
have any doubts, contact your
dealer.
You and others could be seriously
injured.
For gasoline vehicles, pull firmly on
the parking brake lever and put the
transmission in neutral. Move the
selector lever to “P”and make sure
the shift indicator displays "P".
For diesel vehicles, pull firmly on the
parking brake lever and move the
selector lever to "P" and make sure
the shift indicator displays "P".
Make sure to turn off the engine and
remove the key from the engine
control switch before performing any
checks. Select a place with a solid and level
surface to perform the checking and
maintenance work. Make sure to
chock the wheels. It would be very
dangerous if the vehicle started
to move.
For gasoline vehicles, when
performing work on the electrical
system, be sure to remove the cable
from the negative terminal on the
battery.
For diesel vehicles, when
performing work on the electrical
system, begin by turning the engine
control switch to the "LOCK"
position, wait at least 3 minutes, and
then disconnect the negative cable
from the negative terminal on
battery. If the negative cable is
disconnected within 3 minutes, the
engine control module may
malfunction.
For gasoline vehicles, when working
on the fuel line or fuel pump,
remove the fuel tank filler cap. The
fuel system is under pressure and
the fuel will overspill unless the
pressure is relieved, possibly
leading to combustion or a fire.