NHTSA ID Number: 10181173
Manufacturer Communication Number: PIP5743
TSB/Document Date: 2020-10-19
Summary
This Preliminary information communicates to the dealer technician diagnostic tips for a vibration concern at low engine speeds. If using these diagnostics shows root cause of the vibration to be the transmission torque converter the torque converter should be replaced.?
Bulletin No.: PIP5743
Published date: 09/29/2020
Preliminary Information
PIP5743 2.5L LCV 6L50 MYB Rough Idle Or Vibration While In Gear
After A Cold Start 800 to 1000 RPM And Or A Short Vibration At A
Launch
Models
Brand:
Model:
Model Years:
VIN:
from
Engine:
to
Transmissions:
Colorado
2019 - 2020
All
All
LCV
MYB
Canyon
2019 - 2020
All
All
LCV
MYB
Involved Region or Country North America
Condition
Customers may comment on a vibration at idle while the transmission is in drive or
reverse at 800 to 1000 RPM. The vibration may be more noticeable in reverse
and during cold starts. Some customers may comment the vehicle has a short
vibration during a launch.
Cause
The cause of this concern may be internal to the torque converter.
Correction:
Using a Pico Oscilloscope Diagnostic Kit, mount the PicoScope 3 axis vibration sensor (TA143) on the inner driver's
seat
track with the hole or arrow on the sensor facing towards the front of the vehicle.
Start the engine and place the vehicle in drive or reverse.
While in the service bay with the vehicle not moving with the service brake applied increase the engine speed
between 800 and 1000 RPM in an attempt to duplicate the vibration. Record a 30 second time frame of data.
Review the Pico data and the data indicates an E2 vibration at 29 Hz between 1.1 mg to 12.7 mg or an E1 vibration
at 14.1 Hz between 1.14 mg to 7.48 mg replace the transmission torque converter.
Parts Information
Description
Part Number
QTY
Torque Converter
24288046
1
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
8464810
Description
Torque Converter Replacement.
Version History
Version
Modi ed
1
06/24/2020 - Created on.
Labor Time
Use Publish Labor Time.
© 2020 General Motors. All Rights Reserved.
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TSB/Document ID: PIP5743
Replacement Service Bulletin Number:
MFR Communication Date: 2020-09-29
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SUSPENSION
MFR Component System:
MFR Component Subsystem:
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