20NA153

Bulletin No.:
Service Bulletin
Date:
20-NA-153
August, 2020
TECHNICAL
Subject:
Reduction in Power, Malfunction Indicator Lamp (MIL) Illuminated - DTC P17A2 Set
Brand:
Model:
Cadillac
ATS
Chevrolet
Camaro
Model Year:
from
2016
VIN:
to
2019
2020
from
to
—
—
Engine:
Transmission:
—
6 Speed
Manual (M13)
Involved Region or Country
North America
Condition
Some customers may comment that the MIL is illuminated.
Some technicians may find DTC P17A2 (Transmission Clutch Slip Detected) set in the
Engine Control Module (ECM).
Cause
In some instances, the output speed sensor reluctor wheel maybe slipping on the shaft
due to low output shaft nut torque.
Correction
Remove the output vehicle speed sensor. Refer to Vehicle Speed Sensor Replacement
in SI.
Utilizing a small tool, lightly pry on the speed sensor reluctor wheel:
• If the reluctor wheel moves, refer to the Service Procedure below.
• If the reluctor wheel does not move, refer to SI for further diagnostics.
2. Remove the two-piece propeller shaft. Refer to
Two-Piece Propeller Shaft Replacement in SI.
• Two-Piece Propeller Shaft Replacement
(Coupe MM6, M13)
• Two-Piece Propeller Shaft Replacement
(Convertible MM6, M13)
Service Procedure
1. Shift the transmission into NEUTRAL.
4180513
Copyright 2020 General Motors LLC. All Rights Reserved.
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Bulletin No.: 20-NA-153
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3. Install the J-45012 Holding Fixture (1).
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August, 2020
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4. While holding the J-45012 Holding Fixture (1),
remove the output shaft flange nut (3) using an
appropriate tool.
5. Remove the output shaft flange thrust washer (2).
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Bulletin No.: 20-NA-153
5621281
6. Install the new output shaft flange thrust
washer (2).
7. While holding the J-45012 Holding Fixture (1) and
using an appropriate tool, install the new nut and
tighten the output shaft flange nut (3) to 145 Y
(107 lb ft).
Bulletin No.: 20-NA-153
August, 2020
Page 5
5621285
8. Remove the J-45012 Holding Fixture (1).
9. Install the two-piece propeller shaft. Refer to
Two-Piece Propeller Shaft Replacement in SI.
• Two-Piece Propeller Shaft Replacement
(Coupe MM6, M13)
• Two-Piece Propeller Shaft Replacement
(Convertible MM6, M13)
Parts Information
Causal
Part
Description
Part
Number
Qty
X
Washer
19299751
1
X
Nut
89059464
1
N/A
Seal, O-RING
SPD SENS
Refer
to EPC
1
Version
1
Modified
Released August 07, 2020
Warranty Information
For vehicles repaired under the Powertrain coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor
Operation
8481028*
Description
Labor Time
Nut and Washer
Replacement
2.2 hrs (ATS)
2.7 hrs
(Camaro)
*This is a unique Labor Operation for bulletin use only.
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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