Subject: | Transmission Line Pressure Gauge Adapter |
Models: | 2008 Chevrolet Tahoe Two-Mode Hybrid |
2008 GMC Yukon Two-Mode Hybrid |
Equipped With A 2ML70 Transmission RPO M99 |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
When preforming diagnosis on the vehicles listed above equipped with the 2ML70 transmission it may be necessary to check the main fluid pump or auxiliary fluid pump pressure. Technicians may find that they are unable to attach a pressure gauge.
To attach the pressure gauge to the transmission it will be necessary to use adapter fitting J45056. This adapter was originally released to aid in pressure testing the Allison LCT1000 transmission and includes an o-ring type seal. This tool is currently available through Kent-Moore Tools.
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.