Chevrolet 4500 HD 2023 Manual page 153

152 Driving and Operating
Continuing to drive without performing DPF
regeneration will cause the check engine
malfunction indicator light and reduced
engine power indicator light to come on, an
engine power reduction, and may cause
damage to the DPF filter. See Driver
Information Center (DIC) 0 64.
Running Regeneration Procedure
Use this option for completing DPF
regeneration, if driving conditions and traffic
allow you to maintain a relatively constant
speed above 48 km/h (30 MPH) for about
20 minutes.
Follow the steps below to use Running
regeneration:
1. Determine if road and traffic conditions
allow for relatively constant speeds
above 48 km/h (30 MPH).
2. Increase the vehicle speed above
48 km/h (30 MPH) and keep a constant
speed.
3. When vehicle speed, engine coolant
temperature and other factors are met
the engine control module (ECM) will
begin DPF regeneration and the
regeneration in progress indicator light
(amber) will appear on the DIC.
4. Continue driving until the regeneration in
progress indicator light (amber) goes off.
When this indicator light goes off the
DPF regeneration is complete.
See Driver Information Center (DIC) 0 64.
While the vehicle is at a stop with engine
idling, the engine speed increases.
Switch Regeneration Procedure
Warning
To prevent a fire, make sure that there is
no flammable material near the muffler,
DPF and exhaust pipe. Remember that
the temperature of exhaust gases is high
enough to burn you. You and others
could be seriously injured.
Select Switch regeneration procedure if the
Running regeneration procedure is not
possible, or if the selectable (switch)
regeneration required warning light (amber
or red) is displayed on the DIC.
1. Stop the vehicle at a safe place free of
flammable material such as dead grass,
leaves or waste paper.
2. Move the selector lever into the P
position and firmly engage the parking
brake.
3. Let the engine idle. Be sure the
accelerator pedal is not pressed and the
PTO switch (if equipped) is OFF.
4. Press and release the DPF switch.