A/T - Production Updates
INFORMATIONBulletin No.: 08-07-30-041
Date: September 04, 2008
Subject:
Information On 2009 M30 4L60E, M32 4L65E and M70 4L70E HYDRA-MATIC(R) RWD Four Speed Automatic Transmission Controls Product Update
Models:
2009 Chevrolet Avalanche, Colorado, Express, Silverado, Tahoe, TrailBlazer, TrailBlazer SS
2009 GMC Canyon, Envoy, Envoy Denali, Savana, Sierra, Yukon
2009 Saab 9-7X Models
Equipped with HYDRA-MATIC(R) 4L60E, 4L65E, 4L70E Four Speed RWD Automatic Transmission (RPOs M30, M32, M70)
For the 2009 model year, there are several controls changes to the 4L60E, 4L65E and 4L70E.
The valve body casting has been changed and will not back service due to the removal of the components shown above.
1. A new Internal Mode Switch (IMS) has been added (2). The PSM has been deleted.
^ Do not reuse the roll pin that retains the IMS (2) to the manual shaft (3).
^ Do not remove the "C" clip from the IMS (2). This will damage the part.
2. The manual shaft (3) has been redesigned to accommodate the IMS (2).
3. The actuator rod (1) is a new design and will back service. It has a flat on the rod to accommodate the IMS (2).
The wiring harness has been changed and now has the temperature sensor (2) in the harness with a gray connector. Both the 20-way connector (1) and the 6-pin connector for the IMS are now blue in color (3).
The new DTCs shown above have been added for the IMS.
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