NHTSA ID Number: 10156952
Manufacturer Communication Number: PIP5541A
Summary
This Preliminary information communicates to the dealer technician using the PICO scope will aid in determining if the if the engine or transmission is root cause of a vibration or shudder concern.
7 Affected Products
Vehicles
CHEVROLET | SILVERADO | 2017 |
| CHEVROLET | SILVERADO 2500 | 2018-2019 |
| CHEVROLET | SILVERADO 3500 | 2019 |
| GMC | SIERRA | 2017 |
| GMC | SIERRA 2500 | 2019 |
| GMC | SIERRA 3500 | 2018 |
SEOCONTENT-START
Bulletin No.: PIP5541A
Published date: 03/27/2019
Preliminary Information
PIP5541A Shudder Or Vibration From The Transmission
Models
| Brand: | Model: | Model Years: | VIN: | Engine: | Transmissions: | |
|---|---|---|---|---|---|---|
| from | to | |||||
| Chevrolet |
Silverado | 2017 – 2018 | All | All | L5P (6.6L) | MW7 Allison Transmission (LCT1000) |
| Chevrolet |
Silverado 2500/3500 | 2019 | All | All | L5P (6.6L) | MW7 Allison Transmission (LCT1000) |
| GMC | Sierra | 2017 – 2018 | All | All | L5P (6.6L) | MW7 Allison Transmission (LCT1000) |
| GMC | Sierra 2500/3500 | 2019 | All | All | L5P (6.6L) | MW7 Allison Transmission (LCT1000) |
| Involved Region or Country | North America and North America Export Regions |
| Condition | Some customers may comment on any of the following conditions:
A vibration, shake or shudder during light throttle acceleration between 25 and 70 mph (40 and 112 km/h) steady state driving. A shudder feeling that may be described as driving over rumble strips or rough pavement. A shudder after the 2-3 shift. |
| Cause | Possible engine performance issue. |
Correction:
The use of the Pico scope will aid in determining if the above listed conditions are related to the engine or transmission.
Place the PICO Scope pick up on passenger seat track and drive the vehicle under the conditions that the concern can be duplicated.
Click the record button when the concern is present and save the file.
While reviewing the Pico file click the add vibration button and add E0.5.
If the Pico file shows E0.5 being the dominant disturbance as shown below the concern is not torque converter clutch shudder and may be an engine performance concern.
Additional SI Keywords
accel, accelerate, automatic, bite, chuggle, excessive, fire, fish, fish-bite, fishbite, fluctuation, fluid, hesitate, high, light, miss, miss-fire, misfire, RPM, slip, speed, strip, surge, tach, tachometer, TCC, vibrate
Version History
| Version | 2 |
| Modified | 01-03-2018 – Created on
03/27/2019 – Added better description of the amount of E0.5 disturbance. Added the 2019 model year. |
SEOCONTENT-END
Bulletin No.: PIP5541A
Published date: 03/27/2019
To View or Download this Document Click Here
Bulletin No.: PIP5541
Published date: 01/5/2018
To View or Download this Document Click Here
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