Service Bulletin

Bulletin No.:

18-NA-307

Date:

May, 2021

TECHNICAL
Subject:

Lack of Power, Reduce Power Displayed on Drivers Information Center (DIC), Rough
Idle, Stabilitrak Light On, Malfunction Indicator Light (MIL) Illuminated - DTC P0014 ,
P0365, P0366, P06A3, P16A1 and/or P016A2 Set

Brand:

Model:

Chevrolet

Colorado

GMC

Canyon

Involved Region or Country

Model Year:
from

to

2015

2021

VIN:
from

to

Engine:

Transmission:

LCV

North America, Uzbekistan, Russia, Middle East, Israel, Palestine, Chile, Columbia, Peru,
GM Korea and Africa.
Some customers may comment on one or more of the following conditions:
Note: This is a multi-wire bundled harness and depending on which wire is damaged,
can set a variety of DTCs. Not all of the effects or driver notifications listed have been
experienced. However, the different effects and driver notifications may be caused by one
of the wires in the harness being chafed or cut. Components on different lines in the list
below are in different circuits. Due to the cause of the condition, and the positions of the
wires in the harness, it is unlikely that more than one circuit and/or fuse will be affected by
the condition.

Condition

• Lack of power
• Reduced Power displayed on DIC
• Rough idle
• Stabilitrak light on
Note: This is a multi-wire bundled harness and, depending on which wire is damaged,
can set a variety of DTCs.
Some technicians may find one or more of the following DTC’s set in History of the
Engine Control Module (ECM):
• P0014: Exhaust Camshaft Position System Performance
• P0365: Exhaust Camshaft Position Sensor Circuit
• P0366: Exhaust Camshaft Position System Performance
• P06A3: 5V Reference 4 Circuit
• P16A1: Sensor Communication Circuit High Voltage
• P16A2: Sensor Communication Circuit Performance

Copyright 2021 General Motors LLC. All Rights Reserved.

Page 2

May, 2021

Bulletin No.: 18-NA-307

Cause

5153274

This may be caused by the engine wiring harness chaffing on the edge of the camshaft
cover (A) and/or the cylinder head (B).
Note: Possible multiple effects or driver notifications may be experienced by one of the
wires in the engine harness being chafed or cut in different circuits. Due to the cause of
the condition, and the positions of the wires in the engine harness, it is unlikely that more
than one circuit and/or fuse will be affected by the condition.
Correction

1. Inspect the engine wiring harness conduit and wires for chaffing.
2. Repair the wires per the Wiring Repairs procedure in SI.
3. Using Woven Polyester Electrical Tape (PET), tape all the contact points of the
engine harness ensuring that the tape is applied in a double layer extending along
the engine harness past the camshaft cover or cylinder head.
4. Utilizing tie straps, position the engine wiring harness away from the camshaft cover
or cylinder head.

Bulletin No.: 18-NA-307

May, 2021

Page 3

Parts Information
No parts are required for this repair.

Warranty Information
For vehicles repaired under warranty, use:
Labor Operation

Description

Labor Time

5430902

Wire-to-Wire Repair

Use the Published Labor
Operations Time

Version

3

Modified

Released October 12, 2018
Revised December 12, 2018 - Added more DTC’s to bulletin.
Revised May 24, 2021 - Added 2020–2021 to Model Year section and DTC P16A1 and
P16A2 to Subject and Condition sections.

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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