Exhaust Brake - Chevrolet Low Cab Forward 6.7L 2022 Owner's Manual

176 Driving and Operating
Checking the Parking Brake Lever Stroke
Pull the parking brake lever from the fully
released position to the wheel locked
position to check that the air exhaust sound
is heard and the lever stays in position.
See Maintenance Schedule 0 260 and
Additional Maintenance and Care 0 281.

Exhaust Brake

Exhaust Brake Switch
When turned on, the system increases the
amount of power absorbed by the engine
while coasting in gear. Whenever slowing
down the vehicle, such as on down grades,
in city traffic or approaching stop signals,
this brake system may be used.
To turn on the exhaust brake system while
driving, pull the lever backward. The exhaust
brake indicator light comes on. The exhaust
brake will engage automatically when the
accelerator pedal is released and vehicle
speed is above 16 km/h (10 MPH).
The exhaust brake will disengage when the
accelerator pedal is depressed. Releasing the
pedal reengages the exhaust brake, however
there is a 0.5 second delay in engagement.
Push the lever forward to turn the exhaust
brake off during idling.
Exhaust brake activation results in an
automatic downshift to the lowest
permissible gear for the given vehicle speed.
Refer to the Cummins Owner s Manual for
additional details about exhaust brake
operation.
Warning
It is extremely dangerous to apply the
exhaust brake on slippery roads as the
tires can skid.
You and others could be seriously injured.
Even if the selector lever is placed in the N
position, the exhaust brake does not
disengage until the engine is warmed up if
the warm-up system is on.
Conditions for Inoperable Exhaust Brake
Under the following conditions, the exhaust
brake does not engage even if the exhaust
brake indicator light comes on:
The accelerator pedal is depressed.
The vehicle is traveling at
16 km/h (10 MPH) or lower speeds.