150730002A

Service Bulletin
Bulletin No.:
15-07-30-002A
Date:
February, 2019
TECHNICAL
Subject:
MIL Illuminated with Firm Shifts, Shudder, Engine RPM Flare and DTCs P0606, P16F3
or P2818
Models:
2015 Cadillac Escalade, Escalade ESV
2015 Chevrolet Silverado
2015 GMC Sierra, Yukon, Yukon XL
Equipped with 8L90 Automatic Transmission (RPO M5U)
Attention: This Bulletin also applies to any of the above models that may be Export vehicles.
This bulletin has been revised to update the Warranty Information. Please discard Bulletin
Number 15-07-30-002.
Condition
Some customers may comment on any of the following
conditions:
• Firm 1-2 upshifts.
• Firm 3-1 downshifts.
Note: During low speeds with no accelerator pedal
input, the downshift will most likely be a 3-1 shift.
•
•
Engine RPM flare on tip-in.
Malfunction Indicator Lamp (MIL) illuminated with
DTC P0606, P16F3 or P2818 set as current or
history.
Correction
An revised software calibration has been released to
address these conditions.
Update the Transmission Control Module (TCM) using
the Service Programming System (SPS) with the latest
calibrations available on TIS2WEB. Refer to the
K71 Transmission Control Module: Programming and
Setup (8L45/90) in SI.
Important: Verify the battery voltage is more than
12 volts but less than 16 volts before proceeding with
reprogramming. The battery must be fully charged
BEFORE reprogramming.
Important: During reprogramming, the battery voltage
must be maintained within the proper range of
12-15.5 volts. CONNECT the approved Midtronics®
PSC 550 Battery Maintainer (SPS Programming
Support Tool (EL-49642) to the vehicle or the GR8
(EL50313) in the power supply mode.
After the reprogramming of the TCM, the transmission
service fast learn procedure is required.
Copyright 2019 General Motors LLC. All Rights Reserved.
Transmission Service Fast Learn Procedure
Important: Failure to perform this procedure may
result in poor transmission performance, DTCs being
set, or customer dissatisfaction. Perform the service
fast learn procedure in the exact sequence as listed
below.
1. Ignition ON, clear any DTCs with a scan tool.
2. Ignition OFF, and all vehicle systems OFF. It may
take up to 2 minutes for all vehicle control modules
to power down.
Note: If the transmission fluid temperature is not
between 75°C (167°F) and 85°C (185°F) the scan tool
will not allow you to perform the service fast learn
procedure.
3. Engine running, transmission in drive position with
brake applied. Perform the service fast learn
procedure with a scan tool. Follow the instructions
on the scan tool.
4. Ignition OFF for 2 minutes.
Page 2
February, 2019
Bulletin No.: 15-07-30-002A
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
2810175
Transmission Control Module Reprogramming with SPS
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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