Battery Warning Light; Malfunction Indicator Lamp (Check Engine Light) - Chevrolet Low Cab Forward 4500 2019 Series Owner's Manual

72 Instruments and Controls
sound. The warning light will go out
and the warning buzzer will stop
when the driver buckles the
seat belt.

Battery Warning Light

This light comes on briefly when the
ignition is turned on, but the engine
is not running, as a check to show
the light is working. It should go out
when the engine is started.
If the light stays on, or comes on
while driving, there may be a
problem with the electrical charging
system (such as a loose or broken
fan belt). Pull off to a safe place well
clear of traffic and contact your
dealer. Driving while this light is on
could drain the battery.
Check and Corrective Action
1. Check to see if the fan belt is
broken or loose.
2. If the fan belt is loose, adjust
the tension.
3. If the fan belt is broken or there
is no abnormality in the fan
belt, see your dealer for
service.
See Battery - North America 0 212,
Jump Starting - North America
0 253, and Engine Drive Belt
Routing 0 303.
Malfunction Indicator
Lamp (Check Engine
Light)
This light should come on to show
that it is working when the engine
control switch is turned to the ON
position, and then should go out
after the engine is started.
If this light stays on or comes on
while the engine is running, it
indicates a malfunction with the
engine electronic emission control
system. Avoid driving at high
speeds and have the vehicle
inspected by your dealer.
If this light comes on when the fuel
tank is empty, you do not need to
have your vehicle serviced.
If this light comes on intermittently
or continuously while driving,
service is required. Even if the
vehicle is drivable and does not
require towing, see your dealer as
soon as possible. Continued driving
without having the system serviced
could cause damage to the
emission control system. It could
also affect fuel economy and
drivability.