SB-12-K-003-A

IMPORTANT SERVICE
INFORMATION FOR:
 SERVICE MANAGER
 SERVICE ADVISOR
 TECHNICIAN
 PARTS DEPARTMENT
 WARRANTY PERSONNEL
SB-10056381-9128
BULLETIN NUMBER:
SB12-K-003A
ISSUE DATE:
JULY 2014
GROUP:
TRANSMISSION
PREVENTING UNNECESSARY AISIN 6-SPEED AUTOMATIC
TRANSMISSION REPAIR OR REPLACEMENT – REPROGRAM TCM
AFFECTED VEHICLES
• 2007-2013MY Isuzu N-Series
• 2007-2010MY Chevrolet/GMC W-Series
Equipped with Diesel Particulate Filter (DPF) and Automatic Transmission
This bulletin supersedes bulletin number SB12-K-003. This bulletin is being revised to
update the Information section. Please discard previous bulletin SB12-K-003.
INFORMATION
An investigation of AISIN transmission parts and assemblies has shown many components
are being unnecessarily replaced. Isuzu has identified a common occurrence of an
illuminated check transmission lamp with one or more of the following DTCs set in the
transmission control module (TCM). Many Results show there is no fault with the
transmission. These DTC’s may be resolved by reprogramming the TCM with revised
calibrations. The chart below identifies which vehicle years/models/DTC’s for which this
bulletin pertains.
Model
Affected DTCs
P0475, P0742, P0751, P0756, P0761, P0766, P0796
P0503, P0707, P0708, P0742, P0746, P0751
P0756, P0761, P0766, P0776, P0796, P084B
2007-2010MY
2011-2013MY 5.2L Diesel 4HK1
2011-2013MY 3.0L Diesel 4JJ1
Follow the diagnostics for these codes. If no mechanical fault can be found during normal
diagnosis, follow the service procedure in this bulletin to correct the concern.
NOTE: Do NOT replace any parts unless test results prove that the parts are faulty.
SERVICE PROCEDURE
Reprogram the TCM with the latest software and calibrations using the Isuzu Diagnostic
Service System (IDSS II) if the calibration part number is NOT listed below:
Model
2007-2010MY 12,000GVW
2007-2010MY 14,500GVW or Higher
2011-2013MY 5.2L Diesel 4HK1
2011-2013MY 3.0L Diesel 4JJ1
Corrected Calibration
98206912 or Higher
98206913 or Higher
98208017 or Higher
98208016 or Higher
WARRANTY INFORMATION
For vehicles still covered under the basic warranty, use:
Labor Operation
Description
Labor Time
K8010
P0756 Diagnostic Recalibration
0.4