NHTSA ID Number: 10193431
Manufacturer Communication Number: PIP5743A
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.
6 Affected Products
Vehicles
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.
Parts Information
| Description | Part Number | QTY |
| Torque Converter | 24288046 | 1 |
SEOCONTENT-START
Bulletin No.: PIP5743A Published date: 04/6/2021 Preliminary Information PIP5743A 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: Chevrolet GMC Model: Colorado Canyon Model Years: 2019 – 2021 2019 – 2021 VIN: from to All All All All Engine: LCV LCV MYB MYB Transmissions: Involved Region or Country Condition Cause North America 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. The cause of this concern may be internal to the torque converter. Correction: Using a Pico Oscilloscope Diagnostic Kit, mount the Pico Scope 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 Torque Converter Part Number 24288046 QTY 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 Description Labor Time 8464810 Torque Converter Replacement. Use Publish Labor Time. Version History Version 2 Modified 06/24/2020 – Created on. 04/06/2021 – Added 2021 Model Years
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5743A
Published date: 04/6/2021
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