File in Section:

Service Bulletin

07 - Transmission/Transaxle

Bulletin No.:

09-07-30-004J

Date:

February, 2014

TECHNICAL
Subject:

Slips in Reverse or Third, Delayed Reverse or Drive Engagement, DTC P0776, P2715,
P2723, Harsh 2-3 Shifts (Inspect 1-2-3-4 / 3-5-R Housing and Pump Seal Rings)

Models:

2006-2009 Cadillac STS-V, XLR, XLR-V
2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT
2006-2009 Chevrolet Corvette
2007-2008 Chevrolet Silverado
2008 Chevrolet Suburban
2007-2008 GMC Sierra, Sierra Denali, Yukon Denali, Yukon XL Denali
2008 GMC Yukon XL
2008-2009 HUMMER H2
2008-2009 Pontiac G8
Equipped with 6L80 or 6L90 Automatic Transmission (RPOs MYC, MYD)

This bulletin has been revised to update the 2006-2009 Vehicles correction section and
update the Labor Operation to the Global Labor Code (GLC). Please discard Corporate
Bulletin Number 09-07-30-004I.

Condition

2006-2008 Vehicles

Some customers may comment on any of the following
conditions:
• Slip when Reverse is selected or no reverse.
• Delayed engagement into reverse.
• MIL illuminated. DTCs P0776, P2715 or P2723
are found as an active or a history code in
the TCM.
• Harsh shifts from second to third.
• Harsh shifts from fourth to fifth or slips in fifth.
• Slips on acceleration when passing.

Cause

Copyright 2014 General Motors LLC. All Rights Reserved.

This condition may be caused by a cracked 1-2-3-4 /
3-5-R clutch housing.

Correction
Important: If a cracked housing is identified, it must be
replaced. Complete, assembled 1-2-3-4 / 3-5-R clutch
housings are now available for most applications.
These clutch housings come complete with all pistons,
seals, clutches, bearing and internal parts. No
assembly of the clutch housing is required before it is
installed. For applications without a complete,
assembled 1-2-3-4 / 3-5-R clutch housing, individual
parts must be ordered and the housing assembled in
the dealership.

Page 2

February, 2014

Bulletin No.: 09-07-30-004J

Housing Assembled
Inspect the 1-2-3-4 / 3-5-R clutch housing for a possible
cracked weld. The housing can be inspected either
assembled or disassembled.

2715381

1. Apply soap compound to the weld area of the
housing.
2. Hold your thumb over the air bleed passage.
3. For a fully assembled 1-2-3-4 and 3-5 reverse
clutch housing, spray compressed air into the 3-5R
clutch feed hole and inspect the weld area for
bubbles.
4. If bubbles are detected, a new housing is required.

Bulletin No.: 09-07-30-004J

February, 2014

Page 3

Housing Disassembled
Inspect the 1-2-3-4 / 3-5-R clutch housing for a possible
cracked weld.

2539550

1. Apply soap compound to weld area of the housing.
2. Hold your thumb over the air bleed passage.
3. Spray compressed air into the housing and inspect
the weld area for bubbles.
4. If bubbles are detected, a new housing is required.
Important: The 6L80 transmission had a design
change to the 1-2-3-4 piston, 1-2-3-4 piston housing
and the 3-5-R piston for the 2008 model year.
Installation of a 2008, 6L80 complete housing assembly
into a 2007 or older 6L80 may result in a 2-3 shift flare
or 3-5-R clutch distress.

Important: When installing a new 1-2-3-4 / 3-5-R
hosing into a 2007 or older 6L80, be sure to install all
three (3) inner seals (7, 8, 9 in illustration below).
Failure to install these seals can result in no reverse, no
forward or distressed clutches.

Page 4

February, 2014

Bulletin No.: 09-07-30-004J

1555367

2006-2009 Vehicles
A harsh 2-3 shift condition may be caused by leaking
1-2-3-4 and 3-5-R clutch fluid seal rings (1) on the
transmission fluid pump cover assembly.

2219005

Inspect the fluid seal rings. Transmissions in 2006,
2007, 2008 and early build 2009 models used a
1- piece design seal ring in production. Starting
December 2008, a 2-piece seal ring design was
implemented. The 1-piece seal ring design may cause
a harsh 2-3 shift due to leakage. This is typically a low
mileage issue. If the seal rings are a 1-piece design
they should be replaced with new 1-piece design seal
rings. It is not necessary to replace the pump cover.
Notice: The clutch fluid seal rings must be installed in
a specific way. Failure to install new clutch fluid seal
rings in the proper orientation may cause a repeat
harsh 2-3 shift. Refer to 1-2-3-4 and 3-5 Reverse Clutch
Fluid Seal Ring Installation (6L80/90) in SI for correct
installation.
If the seals are the 2-piece design shown below, they
do not need to be replaced unless they are worn or
damaged.
Important: Do not install 1-piece design seal rings on
a 2-piece seal ring design pump cover. The 2-piece
seal ring design pump cover can be identified by the
notch in the seal ring grooves that accepts the tab on
the 2-piece design seal rings.

Bulletin No.: 09-07-30-004J

February, 2014

Page 5

Parts Information
Part Number

Description

24238694

Clutch, 1-2-3-4 & 3-5-R (MYC) 2008 –
Complete with housing, all pistons, seals,
clutches, bearing and internal parts

24238695

Clutch, 1-2-3-4 & 3-5-R (MYD) 2007,
2008 – Complete with housing, all
pistons, seals, clutches, bearing and
internal parts

24248581

Ring kit, 1-2-3-4 & 3-5-R Clutch Fluid
Seal (1-piece design seal rings, if needed
as determined by inspection above)

Refer to
Appropriate
Parts Catalog

Complete Assembled 1-2-3-4 & 3-5-R
Clutch Housings (MYC) 2006-2007 are
not available. Individual parts must be
ordered and the housing assembled in
the dealership.

24260606

Tube, Transmission Fluid Fill - 2007-2008
C/K Truck (MYC)

2475192

Important: For full size trucks equipped with 6L80
(MYC), any time the transmission is removed, install a
revised fluid fill tube as shown below if it is not already
present. This fill tube incorporates a damper near the
top of the tube that prevents resonance related
damage.

Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation

8466450

Labor
Time

Description
3-5-Reverse Clutch Plate
Replacement

Use
Published
Labor
Operation
Time

2688999

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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