| Subject: | Turbine Shaft Usage With/Without Input Speed Sensor |
| Models: | 2006 All Cadillac, Chevrolet and GMC Full-Sized Trucks and Utilities |
| 2006 All Buick, Chevrolet, GMC Mid-Sized Trucks and Utilities |
| with 4L60E (RPO M30) or 4L65E (RPO M32) or 4L70E (RPO M70) Transmission |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some 2006, 4L60E, 4L65E or 4L70E automatic transmissions may be built with a turbine shaft that has an Input Speed Sensor (ISS) rotor even thought the transmission is used in a non-ISS application. Also, GMSPO may service 2006 non-ISS transmissions with
a turbine shaft that has an ISS rotor.
Recommendation/Instructions:
These are both acceptable usages and will not cause functional concerns.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
