NHTSA ID Number: 10246556
Manufacturer Communication Number: 16NA014
TSB/Document Date: 2023-12-11
Summary
Delayed Engagement After Sitting With Engine Off
the stator shaft support assembly.
23. Install the drive sprocket (3) and drive link
assembly (4).
24. Install the (front) support cover gasket (5) on the
front cover (7).
25. Install the front cover seal (6) on the front cover (7).
Note: Ensure the drive link assembly is not pinched by
the front cover and moves freely on the drive sprocket.
26. Install the front cover (7).
27. Install the 11 NEW front cover bolts (8). Gradually
tighten the bolts in the sequence shown. Tighten
the bolts a first pass to 6.5 Y (58 lb in). Tighten
the bolts a final pass 30 Degrees.
Page 8
January, 2016
Bulletin No.: 16-NA-014
4358789
Note: Ensure the driven sprocket locking tab is in the
unlocked position before installing the sprocket. The
driven sprocket locking tab is located on the back of the
sprocket and faces the pump.
28. Install the drive link (chain) to the driven sprocket
(1) and then install the driven sprocket to the oil
pump shaft. Rotate the sprocket as shown and
push down on the tab until it locks the driven
sprocket in place.
29. Install the fluid baffle (2).
30. Using the DT-48285 Torx Plus socket, secure the
baffle using two NEW fluid baffle bolts (3). Tighten
the bolts a first pass to 4 Y (35 lb in). Tighten the
bolts a final pass to 45 degrees.
Bulletin No.: 16-NA-014
January, 2016
Page 9
4358796
31. Install the fluid pan and gasket and secure with 15
bolts. Tighten the bolts to 10 Y (89 lb in) in the
sequence shown.
32. Install the transmission into the vehicle. Refer to
Transmission Replacement in SI.
Parts Information
Description
Part Number
Qty
Trans Model
Component
Number in
Disassembled
Views
GASKET-A/TRNS
FLUID PAN
24260071
1 (if required)
8L45/8L90
48
BOLT/SCREW-A/TRNS
FLUID BFL
11548404
2
8L45/8L90
12
BOLT/SCREW-A/TRNS
CASE FRT CVR
11548201
11
8L45/8L90
3
SEAL-A/TRNS CASE
FRT CVR
24266366
1 (if required)
8L90
5
SEAL-A/TRNS CASE
FRT CVR
24251906
1 (if required)
8L45
5
GASKET-A/TRNS FRT
SUPT CVR
24272658
1
8L90
19
GASKET-A/TRNS FRT
SUPT CVR
24264863
1
8L45
19
WASHER-DRV SPKT THR
(FRONT)
24259119
1 (if required)
8L45/8L90
6
WASHER-DRV SPKT
THR (REAR)
24259427
1 (if required)
8L45/8L90
8
24261849 (Part of
24271697 kit)
1
8L90
500
24261848 (Part of
24277071 kit)
1
8L45
500
SUPPORT ASMSTATOR SHF
24277234
1
8L90
14
SUPPORT ASMSTATOR SHF
24277230
1
8L45
14
Page 10
January, 2016
Bulletin No.: 16-NA-014
Description
Part Number
Qty
Trans Model
Component
Number in
Disassembled
Views
COVER-A/TRNS CASE FRT
24277964
1 (if required)
8L90
4
SEAL-T/CV FLUID
24259216
1
8L45/8L90
18
RING-1-3-5-6-7 CLU
FLUID SEAL
24266593
2
8L90
15
RING-1-3-5-6-7 CLU
FLUID SEAL
24266594
2
8L45
15
SEAL ASM-T/CV FLUID
24266709
1
8L45/8L90
2
FLUID, A/TRANS (DEXRON
HP ATF) (1 QUART)
19300536-US
19300537-CA
As Required
8L45/8L90
Warranty Information
Labor
Operation
Description
Labor Time
8465020
Stator Shaft Support
Replacement
Use
Published
Labor
Operation
Time
Version
1
Modified
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: 16NA014
Replacement Service Bulletin Number:
MFR Communication Date: 2016-01-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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