NHTSA ID Number: 10133095
Manufacturer Communication Number: PI1131
TSB/Document Date: 2018-04-16
Summary
This preliminary bulletin provides a procedure to test and/or replace the TEHCM to correct the customers concern of transmission not shifting properly or no specific gears.
Bulletin No.: PI1131
Date: Dec-2013
Subject:
Various Missing Gears, DTC P0776, P0796, P0878, P0873, P2714 or P2723 Set
Models:
2011 Buick
LaCrosse, Regal
2011 Chevrolet Cruze, Equinox, Malibu
2011 GMC Terrain
Equipped with 6T40, 6T45 Automatic Transmission (RPOs MHC, MH7, MH8)
Vehicles Built Prior to April 1, 2011
Condition/Concern
Some customers may comment on one of the following conditions:
1.
No first gear along with a possible DTC P2723 or P0878
2.
No second or sixth gear along with a possible DTC P2714 or P0873
3.
No fourth, fifth or sixth gear along with a possible DTC P0796
4.
No reverse, third or fifth gear along with possible DTC P0776
Important: Only one of the conditions detailed above will be experienced with the issue described in this document. Two or more of the conditions detailed
above will not be experienced.
Recommendation/Instructions
The condition may be caused by a non-functioning pressure control solenoid located inside the control solenoid valve assembly (TEHCM). To diagnose the
condition, follow the appropriate 2011 vehicle SI diagnostics as detailed below.
1.
No first gear along with a possible DTC P2723 - Follow DTC P2723 Diagnostics
2.
No second or sixth gear along with a possible DTC P2714 or P0873 – Follow DTC P2714 Diagnostics
3.
No fourth, fifth or sixth gear along with a possible DTC P0796 – Follow DTC P0796 Diagnostics
4.
No reverse, third or fifth gear along with possible DTC P0776 – Follow DTC P0776 Diagnostics
Important: When servicing the transmission in any of the above listed vehicles, technicians may note that the automatic transmission fluid (ATF) has a very
dark appearance, almost as if the fluid has been overheated or the clutches inside the transmission are distressed. The transmission fluid in these vehicles
tends to turn dark due to rust inhibitors used on internal transmission parts during assembly. If the transmission fluid appears dark, do not assume that the
transmission is damaged internally. Continue with diagnosis of the concern. Do not replace the transmission or the transmission fluid based only on the
appearance of the transmission fluid.
If SI diagnostics determine that the condition is caused by the control solenoid valve assembly (TEHCM), it must be replaced.
Parts Information
Part Number
Description
24256524
Valve ASM, Control Solenoid ( w/Body & TCM)
24248473
Body Kit, C/VLV
1
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
8463730
Control Solenoid Valve and Transmission Control Module Assembly Replacement
Use Published Labor
Operation Time
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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TSB/Document ID: PI1131
Replacement Service Bulletin Number:
MFR Communication Date: 2013-12-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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