17NA352

Bulletin No.:
Service Bulletin
Date:
17-NA-352
January, 2022
INFORMATION
Subject:
Brand:
Chevrolet
GMC
Information On DPF Soot Accumulation, Malfunction Indicator Lamp (MIL) Illuminated DTC P2463 Set
Model:
Model Year:
from
Colorado
2016
Express
2017
Canyon
2016
Savana
2017
Involved Region or Country
VIN:
to
from
to
2022
-
-
Engine:
Transmission:
LWN
-
North America, Israel, Palestine, Middle East
There has been a change in the values displayed in GDS 2. Starting with the 2016
Colorado/Canyon, and now on the 2017 Express/Savana, the DPF Soot Accumulation is
measured in percent instead of grams. On vehicles equipped with a LWN engine, the
ECM will not try to perform a regeneration until the DPF Soot Accumulation increases to
approximately 100%. If the DPF Soot Accumulation increases to 110% on a pick-up or
118% on a van and the system has not been able to regenerate, the “continue driving”
message will be displayed on the DIC. If the DPF Soot Accumulation increases to 125%
on a pick-up or 135% on a van, DTC P2463 will set and will now require a service
regeneration to clean the DPF.
Information
Service Regeneration vs Regeneration Enable and Drive Cycle
A Service Regeneration is designed to lower the DPF Soot Accumulation in the DPF in a
very controlled way. It is not as effective at lowering the soot accumulated in the DPF as a
Regeneration Enable followed by a drive.
Please perform a service regeneration if instructed to by service information. As a rule of
thumb, if a vehicle has less than 70% DPF Soot Accumulation, do not perform a
regeneration unless instructed by Service Information.
If you are concerned about the DPF Soot Accumulation, perform a regeneration enable
and return the vehicle to the customer.
Below is an illustration of the location of the exhaust
components, Sensors, and Injectors on the exhaust
aftertreatment system for the above vehicles:
4889155
Copyright 2022 General Motors LLC. All Rights Reserved.
Page 2
January, 2022
1) SENSOR, EXH PRTLT
8) INJECTOR, EMIS RDCN
FLUID
2) SENSOR, EXH
PRESS DIFF
9) SENSOR, EXH TEMP
(POSN 2)
3) FILTER, EXH PRTLT
10) SENSOR, EXH TEMP
(POSN 1)
4) SENSOR, EXH TEMP
(POSN 4)
11) SENSOR, NOX
(POSN 1)
5) SENSOR, EXH TEMP
(POSN 3)
12) CONVERTER, W/UP
OXIDN CTLTC
6) SENSOR, NOX
(POSN 2)
13) INJECTOR,
INDIRECT FUEL
7) CONVERTER, NOX
CTLTC
14) SENSOR, EXH TEMP
(POSN 5)
Additional Information
Note: There is no need to check soot mass at PDI
unless a message or DTC directs you to.
If the vehicles AT PDI reads 40% soot accumulation, it
is NOT considered high and does not require any
service.
• If you have a truck with a “continue driving”
message on the DIC and it has less than 500
miles (800 kilometers), review PIP5468 and
10-06-05-002.
Note: Use this formula as a diagnostic aid and in the
administration of a maintenance schedule. It should
NOT be used to determine warranty coverage.
Bulletin No.: 17-NA-352
Some vehicles may spend a lot of time idling, use the
formula to aid in determining the equivalent mileage
(kilometers).
• Check and record the total engine hours on the
Drivers Information Center (DIC).
• Multiply this time by 33 miles or 53 km.
• The result should be close to the mileage on the
odometer.
⇒ Example 1; If a vehicle has 1.7 engine hours
and 60 miles (97 km) on the odometer, the
engine run time would equate to about 56 miles
(90 km) (1.7 X 33 = 56 (1.7 X 53 = 90)).
This vehicle should not have much soot
accumulation in the DPF. Some of these trucks
can go 500 - 700 miles (800-1100 km) between
a regeneration.
⇒ Example 2; If the vehicle has 626.9 engine
hours and 7,269 miles (11,698 km) on the
odometer, the engine run time would equate to
about 20,688 miles (33,226 km) (626.9 X 33 =
20,688 (626.9 X 53 = 33,226)).
This vehicle would be considered a vehicle that
idles a lot and this information may be useful in
diagnosing any issues.
Parts Information
No parts are required for this repair.
Version
7
Modified
Released November 09,2017
Revised February 02, 2018 - Change Subject.
Revised May 03, 2018 - Update Information section.
Revised July 25, 2018 – Added 2019 Model Year.
Revised September 19, 2019 – Added 2020 Model Year.
Revised October 19, 2020 – Added 2021 Model Year.
Revised January 06, 2022 – Added 2022 Model Year.
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.
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