Shudder/Surging While Driving – 2015-2020 Chevrolet GMC

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Copyright 2020 General Motors LLC. All Rights Reserved.
Service Bulletin Bulletin No.: 20-NA-142
Date: October, 2020
TECHNICAL
Subject: Shudder/Surging While Driving
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Chevrolet
Express
2015
2020
MYC, MYD
Suburban
Silverado 2018
Silverado LD
2019 2019
Silverado 2500/3500
Silverado 1500
(New Model) 2019 2020
GMC
Savana
2015
2020
Sierra 2018
Sierra Limited
2019 2019
Sierra 2500/3500
Sierra 1500
(New Model) 2019 2020
Yukon 2015 2020
Involved Region or Country North America
Condition
Some customers may comment that a surging condition is felt when driving.
Some technicians may find during diagnosis or performing PIP5504F, may identify the
surging as a torque converter shudder.
Cause
This condition may be caused by additives in the transmission fluid may have been
depleted during vehicle operation.
– Some of these additives assisted with regulating a consistent slip rate of the clutches.
Correction
1. Raise the vehicle.
2. Remove the transmission pan.
Page 2 October, 2020 Bulletin No.: 20-NA-142
5360216
• If metallic debris is present remove transmission and replace torque converter,
replace filter. Refer to Torque Converter Replacement in SI.
• If metallic debris is not present replace the transmission filter, reinstall
transmission oil pan and perform the steps in the Service Procedure below.
Service Procedure
1. From the DT-52263 Transmission Fluid Exchange
Kit, remove cooler lines and install DT-52263-1
Block Assembly.
2. Put drain hose into GE-47716-2 Graduated
Bucket.
3. Lower the vehicle.
4. Through dipstick tube add 6 quarts of DEX6
transmission fluid.
5. Start the engine and run 4 quarts into GE-47716-2
Graduated Bucket, then shut vehicle off.
6. Add 4 quarts Dex6 through dipstick tube.
7. Start the engine and run 4 quarts into GE-47716-2
Graduated Bucket, then shut vehicle off (dump
fluid out of bucket as necessary).
8. Add 4 quarts Dex6 through dipstick tube.
9. Raise the vehicle, remove the block assembly and
reinstall the cooler lines.
10. Lower the vehicle.
11. Add correct amount of DEX6 transmission fluid
(approx. 4 quarts) to the system.
Parts Information
Causal
Part
Description Part
Number
Qty
N/A Drum, 55
Gallon (U.S.)
19420008
Refer
to EPC
N/A Drum, 208 Liter
(Canada)
88861754
N/A
3 – 4.73 Liter
Containers
(Canada)
19420143
N/A
6 – 1 Liter
Containers
(Canada)
19420142
N/A 1 Qt (U.S.) 19420007
N/A Kit, Filter 24236933
Bulletin No.: 20-NA-142 October, 2020 Page 3
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
8481018* Automatic Transmission Fluid, Fluid Pan and/or Filter
Replacement 1.8 hr
*This is a unique Labor Operation for Bulletin use only.
Version 4
Modified
Release July 06, 2020
Revised July 20, 2020 – Update Parts Information Section.
Revised September 08, 2020 – Removed the 1 gallon p/n 88865765 from the Parts
Information section.
Revised October 15, 2020 – Added 2020 to Model Year.
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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