File in Section:
Bulletin No.:

Service Bulletin

Date:

18-NA-058
February, 2018

TECHNICAL
Subject:

Diesel Exhaust Fluid Warning Level Message in DIC Will Not Update After Filling
DEF Tank

Brand:

Model

Chevrolet

Cruze (Gen
II - VIN B)
(Hatchback
Only)

Model Year:

VIN:

from

to

from

to

2018

2018

—

—

Engine:

Transmission:

1.6L —
RPO LH7

Automatic
Transmission
9T50 —
RPO M3D

Involved Region or Country

United States, Canada and Mexico.

Condition

Some customers may comment that the Diesel Exhaust Fluid Warning Level message in
the Driver Information Center will not update after filling the DEF Tank.

Cause

A software anomaly in the K115 Reductant Control Module may cause the DEF Level
update to not occur after filling the DEF tank.

Correction

If you encounter a vehicle with the above condition, reprogram the K115 Reductant
Control Module with the latest available software.

Service Procedure
Warning: Diesel Exhaust Fluid (DEF) is corrosive.
Do not allow it to come in contact with your skin,
eyes, or the finished surfaces of the vehicle. If
exposed, it may cause skin and eye irritation. Wear
skin and eye protection when handling. Inhalation
may cause irritation to the upper respiratory tract.
Store in a cool, well-ventilated area. For more safety
and storage information, see the label of the Diesel
Exhaust Fluid container.
Notice:
• The capacity of the Cruze Hatchback DEF tank
is 3.3 gal (12.5 L). To prevent damage to the
system, DO NOT overfill the DEF tank. When
fluid reaches the top of the fill pipe, stop filling.
• Whenever adding DEF to an empty or a very
low tank, always add at least 2 gal (7.6 L) of
fluid to release the vehicle from speed
limitation.
• To avoid vehicle speed limitations, the DEF
tank should be refilled at the first opportunity
after a DEF Warning Level message is
displayed.
• If DEF is added under freezing conditions,
additional time may be required to remove
speed limitations and it may require less fluid
to fill the DEF tank due to expansion. If the DEF
Copyright 2018 General Motors LLC. All Rights Reserved.

tank is refilled at temperatures colder than 12 °
F (−11 °C) , the refilling event may not be
detected by the system.
• A full DEF tank will last for approximately
several thousand kilometers, depending on
vehicle usage. As the DEF level drops,
“various” DEF Warning Level messages will
automatically be displayed in the DIC. The
Diesel Exhaust Fluid level status is available on
the DIC under the Vehicle Information menu.
1. Verify that the DEF tank is full.
2. Ignition ON.
3. If the DEF tank is full or near full and the DEF
Warning Level message will not clear, then Go to
Step 4.
Important: Stable battery voltage is critical during
programming. Any fluctuation, spiking, over voltage or
loss of voltage will interrupt programming. Install the
EL-49642 SPS Programming Support Tool (GM Dealer
Equipment Item #PSC-550) to maintain system voltage.
If not available, connect a fully charged 12 V jumper or
booster pack disconnected from the AC voltage supply.
DO NOT connect a battery charger.
4. Reprogram the K115 Reductant Control Module
with the latest available software. Refer to K115
Reductant Control Module: Programming and
Setup in SI. If not prompted by SPS during the
reprogramming event, it may be necessary to
perform a Reductant Fluid Tank Level reset
using GDS2.

Page 2

February, 2018

Bulletin No.: 18-NA-058

Parts Information
No parts are required for this repair.

Warranty Information
For vehicles repaired under the Emission coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor
Operation

Description

Labor Time

4086078*

K115 Reductant Control
Module: Programming and
Setup

0.3 hr

*This is a unique Labor Operation for Bulletin use only.

Version Information
Version

1

Modified

Released February 22, 2018

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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