4T65E No LIne Pressure - keywords drive forward line low M15 MN7 movement no pressure reverse

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

The vehicle may have a concern of no movement in forward or reverse. Diagnosis will indicate low or no line pressure due to the pump shaft disengagement from the pump drive gear.

Please follow eSI documentation to access pump driveshaft, if the pump shaft sleeve is found loose on the pump shaft then replace the pump shaft. This could impact start of production thru October 2007 build MN7 and M15 4T65E transmissions.

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.