File in Section:
Bulletin No.:

Service Bulletin

Date:

06 - Engine
10-06-05-002A
March, 2014

INFORMATION
Subject:

CLEAN EXHAUST FILTER SEE OWNERS MANUAL NOW or CLEANING EXHAUST
FILTER KEEP DRIVING UNTIL MESSAGE IS CLEARED Displayed on DIC, DTC P2463
May Be Set

Models:

2007-2009 Chevrolet Kodiak
2007-2015 Chevrolet Express, Silverado
2007-2009 GMC TopKick
2007-2015 GMC Savana, Sierra
Equipped With Duramax® 6.6L Diesel Engine – RPO LGH, LML or LMM

This Bulletin is being revised to add Model Year 2011-2015 vehicles, Engine RPO LGH and
LML, update the Subject and add information for a second message that may be displayed in
the DIC: “CLEANING EXHAUST FILTER KEEP DRIVING UNTIL MESSAGE IS CLEARED.”
Please discard Corporate Bulletin Number 10-06-05-002.

Depending on the Model, Model Year of the vehicle and
the Duramax® 6.6L Diesel Engine — RPO LGH, LML or
LMM, one of the following messages will be displayed
in the driver information center (DIC) when a diesel
particulate filter (DPF) cleaning is required:
– “CLEAN EXHAUST FILTER SEE OWNERS
MANUAL NOW”
– “CLEANING EXHAUST FILTER KEEP DRIVING
UNTIL MESSAGE IS CLEARED”
– Either DIC message may be accompanied by
DTC P2463.
The DPF will clean itself as part of normal operation.
Several factors including fuel consumed, hours of
engine operation and miles driven are monitored by the
engine control module (ECM). The self-cleaning occurs
approximately once per tank of fuel. Under certain
driving conditions, such as extended idling,
stop-and-go traffic, etc., the DPF cannot clean itself.
Notice: Instruct the customer that in order for the
filter to clean itself, the vehicle must be driven
above 30 mph (50 km/h) until the message clears.
⇒ If the customer continues to drive with the DPF
warning message displayed and the exhaust filter
is not cleaned as required, the malfunction indicator
lamp will illuminate and the ENGINE POWER IS
REDUCED message will display and dealer service
will be necessary.

Copyright 2014 General Motors LLC. All Rights Reserved.

Do This

Don't Do This

Inform the customer about
the importance of taking the
messages seriously.
Instruct the customer to
operate the vehicle within
the driving conditions
necessary for a self cleaning
of the DPF to occur WHEN
the message appears.

DO NOT submit a warranty
claim for a Diesel Particulate
Filter (DPF) Service
Regeneration when
DTC P2463 is set and a
system malfunction is NOT
found.

“CLEAN EXHAUST FILTER SEE OWNERS MANUAL
NOW” or “CLEANING EXHAUST FILTER KEEP
DRIVING UNTIL MESSAGE IS CLEARED”
If either of the messages appear on the driver
information center (DIC) then a DPF cleaning
(regeneration) is required. This message is displayed to
NOTIFY the DRIVER that the status of the vehicle has
changed and ACTION is required by the DRIVER to
correct the condition. The message is not a onetime
display and will occur periodically through the lifetime of
the vehicle when a DPF regeneration is required based
on engine run time, fuel consumed and distance
traveled since the last DPF regeneration.
1. Perform the Diagnostic System Check - Vehicle.
2. Is DTC P2463 set?
⇒ If DTC P2463 is set, refer to Diagnostic Trouble
Code (DTC) List - Vehicle in SI. After following
the diagnostic procedure return to this bulletin
and PROCEED to Step 3.
⇒ If DTC P2463 is not set, then proceed to Step 3
and inform the customer as indicated.

Page 2

March, 2014

Notice: ADVISE THE CUSTOMER ABOUT ALL OF
THE FOLLOWING INFORMATION:
3. The importance of the message and responding to
it immediately. Clearing the message will only
make the message disappear temporarily and not
correct the problem.
4. Guide the customer to their Duramax ® Diesel
Engine Owner Manual Supplement and review the
information titled: “Diesel Particulate Filter”, in
order to familiarize them with the operation of the
system.
5. Extended idle time MUST be avoided while the
message is displayed because the DPF system is
not capable of self cleaning at idle.
6. Instruct the customer that the most efficient way to
clean the filter is to DRIVE the vehicle at more than
30 mph (50 km/h) UNTIL the warning message
goes OFF.
7. Ignoring the message and continuing to drive with
the warning message ON and the exhaust filter not
being cleaned as required will eventually result in
the following:
7.1. The malfunction indicator lamp (MIL) will
illuminate at which point the DPF warning
message will be displayed and a chime will
also sound.
7.2. Diagnostic Trouble Code DTC P2463 will be
set as a result of excessive soot loading in
the DPF.

Bulletin No.: 10-06-05-002A
7.3. The Engine Power Is Reduced message will
be displayed. The engine WILL operate in
reduced engine power when this occurs.
7.4. Once this occurs, self cleaning of the DPF is
no longer possible and dealer service will be
necessary.
7.5. Possible irreversible damage to the DPF may
occur, requiring repair or replacement.
7.6. Advise the customer that if following the
diagnostic procedure for DTC P2463 in SI
results in a DPF system malfunction NOT
BEING found, the Diesel Particulate Filter
(DPF) Service Regeneration SHOULD NOT
BE CHARGED TO GM WARRANTY.

Duramax® is a Registered Trademark of General
Motors LLC (United States)
Duramax™ is a Trademark of General Motors LLC

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.

WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION