light CHEVROLET LOW CAB FORWARD 2017 Owners Manual

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
194 Driving and Operating
If the DEF level becomes too low or
incorrect fluid is added to the DEF
tank, the warning buzzer will sound,
warning and indicator lights will
come on and engine power will be
reduced. If you see these warning
and indicator lights, add DEF as
soon as possible or have your
vehicle serviced as soon as
possible.
Continuing to drive for too long after
these lights come on will result in
additional warnings, more engine
power reduction and will eventually
result in a severe vehicle speed
limitation. See“Diesel Exhaust
Fluid (DEF) Low Level Warning” and
“Incorrect Diesel Exhaust Fluid
(DEF)/SCR System Malfunction
Warnings” later in this section.
{Warning
Do not touch the water that
comes out from the muffler. The
water is mildly acidified due to the
action of oxidation catalyst inside
the muffler. In the event that the
(Continued)
Warning (Continued)
fluid does come into contact with
your skin, completely wash it off
with water. You and others could
be seriously injured.
Do not relocate or modify the
exhaust pipe, muffler, DPF, SCR,
or DEF tank, which may affect the
exhaust gas cleaning performance.
If any relocation or modification is
necessary, consult your dealer.
The SCR system continues to
operate for approximately 3 minutes
after the engine control switch is
turned to the "LOCK" position. It is
normal to hear a buzzing type noise
from the DEF supply pump
(mounted on the left side frame rail
behind the cab) during the
shutdown process.
If it is necessary to disconnect the
batteries for any reason, be sure to
wait at least 3 minutes after turning
the engine control switch to the
"LOCK" position. This will allow the SCR system to properly complete
its shutdown processes. See
Winter
Driving 0145.
Diesel Exhaust Fluid (DEF) Low
Level Warning
Diesel Exhaust Fluid (DEF) is a
required fluid for the operation of
your diesel engine just as diesel fuel
is required. To avoid running out of
DEF your vehicle will turn on
warning and indicator lights and
reduce engine power in progressive
stages to encourage adding DEF.
The following is a summary of the
diesel exhaust fluid (DEF) low level
warning lights, indicator lights and
engine power reductions.
Continuing to drive for too long after
these lights come on will eventually
result in a severe vehicle speed
limitation.
These warning and indicator lights
will go out automatically and engine
power will be restored to normal
after the SCR system detects that
the DEF tank is refilled with DEF.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
196 Driving and Operating
DEF Tank Level is Low/Empty (cont'd)
StageStage 1 Stage 2Stage 3Stage 4
Indicator light(s)
SolidSlow blinkingFast blinkingFast blinking
Warning buzzer 1 short beep 3 short beeps *3 3 quick beeps *4 Continuous beeping
Restrictions Vehicle speed is
limited to
89 km/h (55 MPH) Vehicle speed is
limited to
56 km/h (35 MPH)Vehicle speed is
limited to
56 km/h (35 MPH)Vehicle speed is
limited to
8 km/h (5 MPH)
Required action Refill DEF as soon
as possible *1 Refill DEF tank
immediately *1Refill DEF tank
immediately *1Refill DEF tank
immediately *1

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 197
DEF Tank Level is Low/Empty (cont'd)
StageStage 1 Stage 2Stage 3Stage 4
CAUTION
This message indicates incorrect DEF or an SCR system malfunction. Immediately contact
your dealer to have your vehicle serviced *2
Remarks:
*1 –See Diesel Exhaust
Fluid (DEF).
*2 –See Incorrect Diesel Exhaust
Fluid (DEF) /SCR System
Malfunction Warnings.
*3 –The warning buzzer continues
to sound every 5 minutes.
*4 –The warning buzzer continues
to sound every 5 minutes and when
driving 8 km (5 miles) or more, the
buzzer changes its sound to
continuous beeping.
DEF tank low stages are as follows: Stage 1 :
When the remaining level
of DEF becomes excessively low
the DEF gauge will change color
from green to amber. In addition,
warning and indicator lights will
come on as shown in the table and
engine power will be reduced so the
vehicle speed will not exceed
89 km/h (55 MPH).
Stage 2 : If driving is continued
without adding DEF (approximately
320 km (200 miles)) the DEF gauge,
warning and indicator lights will
begin blinking. Again, engine power
will be reduced so the vehicle speed
will not exceed 56 km/h (35 MPH). Stage 3 :
If driving is continued until
the DEF tank is empty, the DEF
gauge will change color from amber
to red and the warning and indicator
lights will begin to blink faster.
Engine power will still be reduced so
the vehicle speed will not exceed
56 km/h (35 MPH). The vehicle
speed will be limited to
8 km/h (5 MPH) either when the
vehicle is stopped after driving
further on (approximately
8 km (5 miles)) or when the engine
is restarted.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
198 Driving and Operating
Stage 4 :The DEF gauge is red,
the indicator light is blinking and the
buzzer is beeping continuously
indicates the vehicle speed is
limited to 8 km/h (5 MPH). See
Driver Information Center (DIC)
(Diesel Only) 093.
Incorrect Diesel Exhaust Fluid
(DEF)/SCR System Malfunction
Warnings
The SCR system continuously
monitors emissions reduction
performance and SCR system
malfunction (Type A or Type B).
When a malfunction or incorrect
fluid (such as water or low
concentrated DEF, etc.) is detected,
the SCR system will turn on warning
and indicator lights to encourage
you to have the condition corrected.
In the case of incorrect fluid or if an
SCR system malfunction (Type A) is
detected, continuing to drive for too
long after these lights come on may
eventually result in a severe vehicle
speed limitation. The following is a summary of the
warning lights, indicator lights and
restrictions. When these warning
and indicator lights come on the
DIC, promptly have the vehicle
inspected and serviced at a dealer.
In the case of SCR system
malfunction (Type B), have the
vehicle inspected and serviced at a
dealer.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 199
Incorrect DEF/SCR System Malfunction (Type A) Warnings
Stage Stage 1Stage 2Stage 3Stage 4
DIC main display
DEF gauge (DIC sub
display 2) Various Various Various Various
Indicator light(s)
Slow blinkingFast blinkingFast blinking

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
200 Driving and Operating
Incorrect DEF/SCR System Malfunction (Type A) Warnings (cont'd)
Stage Stage 1Stage 2Stage 3Stage 4
Indicator light(s)
orororor
Warning buzzer 1 short beep 3 short beeps *1 3 quick beeps *2 Continuous beeping
Restriction Vehicle speed:
89 km/h (55 MPH) Vehicle speed:
56 km/h (35 MPH)Vehicle speed:
56 km/h (35 MPH)Vehicle speed:
8 km/h (5 MPH)
Remarks:
*1 –The warning buzzer continues
to sound every 5 minutes. *2
–The warning buzzer continues
to sound every 5 minutes and when
driving 8 km (5 miles) or more, the
buzzer changes its sound to
continuous beeping. When the exhaust system warning
light comes on DIC, promptly have
the vehicle inspected and serviced
at a dealer.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 201
Stage 1 :When incorrect DEF or an
SCR system malfunction (Type A) is
detected, the warning and indicator
lights will come on as shown in the
table and engine power will be
reduced so the vehicle speed will
not exceed 89 km/h (55 MPH).
Stage 2 : If driving is continued for
another approximately
160 km (100 miles), the warning and
indicator lights will begin blinking.
Again, engine power will be reduced
so the vehicle speed will not exceed
56 km/h (35 MPH).
Stage 3 : If driving is continued for
approximately
105 more km (65 miles), the warning
and indicator lights will begin to
blink faster. Engine power will still
be reduced so the vehicle speed will
not exceed 56 km/h (35 MPH). The
vehicle speed will be limited to
8 km/h (5 MPH) either when the
vehicle is stopped after driving
further on (approximately
8 km (5 miles)) or when the engine
is restarted. Stage 4 :
DEF indicator light is
blinking quickly, the other warning
lights are on and the buzzer is
beeping continuously indicates the
vehicle speed is limited to 8 km/h (5
MPH). See Vehicle Messages
(Diesel Only) 097, Malfunction
Indicator Lamp (Check Engine
Light) 084, Diesel Exhaust Fluid
(DEF) Warning Light 090, and
Reduced Engine Power Light 091.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Driving and Operating 203
SCR System Malfunction (Type B) Warning (cont'd)
StageStage 1
Indicator light(s)
or
Warning buzzer 1 short beep
Restriction –

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
204 Driving and Operating
When the exhaust system warning
light comes on, promptly have the
vehicle inspected and serviced at a
dealer.
When a malfunction is detected in
the SCR system, the warning and
the indicator lights shown in the
table come on. SeeVehicle
Messages (Diesel Only) 097,
Malfunction Indicator Lamp (Check
Engine Light) 084, and Diesel
Exhaust Fluid (DEF) Warning Light
0 90.
When the Diesel Exhaust Fluid
(DEF) Tank is Empty
If the DEF tank is empty and
warning and indicator lights are on,
you must follow below procedure to
cancel the vehicle restriction: 1. Turn the engine control switch to the LOCK or ACC position,
and add DEF.
2. After adding DEF, turn the engine control switch to ON
position.
3. Wait until buzzer stops, warnings and indicators are
turned off. 4. If the buzzer does not stop,
return the engine control switch
back to the LOCK position and
add more DEF, and then start
over from step 2 above.
5. Restart the engine.
It may take a while until the warning
lights and indicators turn off and the
buzzer stops after turning the
engine control switch to the ON
position.
It is desirable to fill up the tank with
DEF to avoid DEF remaining level
warning indication from reappearing.
When the outside temperature is
low, refer to Adding DEF in Cold
Weather. See Driver Information
Center (DIC) (Diesel Only) 093,
Brake System Warning Light
(Parking Brake Light) 084, Warning
Buzzers 0101, and Winter Driving
0 145.Automatic
Transmission
On an automatic transmission
vehicle, the driver does not use a
clutch pedal when pulling away,
changing gears, or stopping. Only
the selector lever, accelerator pedal,
and brake pedal are used.
Practice learning the characteristics
of the automatic transmission
vehicle and how to correctly operate
it. When the vehicle is stationary,
remember to keep the brake pedal
firmly pressed, and if necessary,
move the selector lever in the P or
N position and apply the parking
brake.
Creep : With the engine running
and a gear position other than P or
N selected with the selector lever,
power reaches the wheels even
when the accelerator pedal is not
pressed, causing the vehicle to tend
to move.
Furthermore, the higher the engine
speed, the stronger the creep and
the greater the vehicle's tendency
to move.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
210 Driving and Operating
Select 1 position during low speed
operation under 18 km/h (11 MPH).
Select 2 position during low speed
operation under 36 km/h (22 MPH).
On vehicles with a gasoline engine,
any low speed applications such as
sweeper, road marking machinery,
trash collectors, highway striping or
moving, etc. require the following
treatment to prevent the automatic
transmission fluid (ATF) from
overheating:
Select 1 position during low speed
operation under 36 km/h (22 MPH).
Select 2 position during low speed
operation under 61 km/h (38 MPH).
SeeAutomatic Transmission Fluid
Temperature Warning Light 088.
To Stop Your Vehicle 1. To temporarily stop the vehicle, press the brake pedal firmly
while the selector lever is in
D (diesel engine) or D6/
D4 (gasoline engine). 2. Use the parking brake as
required. Press the brake pedal
firmly, and firmly apply the
parking brake.
If the vehicle is stationary for a
long time, move the selector
lever into the N or P position.
If the selector lever is kept in
D (diesel engine) or D6/
D4 (gasoline engine), the
temperature of the automatic
transmission fluid increases
due to heat from the torque
converter.
To ensure reliable brake application,
be sure to use your right foot to
press the brake pedal.
When leaving the driver's seat,
follow the When Parking Your
Vehicle procedure.
To Start After Stopping
To start again after stopping your
vehicle, visually check that the
selector lever is in D (diesel engine)
or D6/D4 (gasoline engine), and
gradually press the accelerator
pedal to pull away. When Parking Your Vehicle
{Warning
Do not leave your vehicle while
the engine is still running. Do not
park with the selector lever in a
position other than P or N the
vehicle may begin moving by
itself due to creeping. You may
accidentally press the accelerator
pedal when getting into the
vehicle causing it to start moving
suddenly.
When parking the vehicle, always
apply the parking brake and move
the selector lever to the P
position.
When parking on a slope, move
the selector lever in the P position
and block the wheels with chocks.
You and others could be seriously
injured.
1. Keep pressing the brake pedal firmly with your right foot, then
apply the parking brake.