| Subject: | Delayed or No Drive And or Delayed or No Reverse With DTC P0701 |
| Models: | 2007-2008 Chevrolet Silverado |
| 2003-2008 Chevrolet Kodiak |
| 2001-2007 Chevrolet Silverado Classis |
| 2001-2007 GMC Sierra Classic |
| Equipped with The Allison LCT1000 Transmission RPO M74 or MW7 |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Customer may comment on a delayed or no engagement into drive and or delayed or no engagement into reverse with DTC P0701 along with any or a combination of the following codes; P0751, P0756, P0761, P0843, P0848, P0873 or P0877.
Recommendation/Instructions:
P0701 indicates no or excessively low pump pressure as a result of a no prime or loss of prime condition within the transmission pump. When any of the above DTCs are accompanied by a P0701 begin troubleshooting with the SI for P0701 first. Be sure to
follow all diagnostic steps. Engineering has been involved and investigated cases of P0701 codes. DTC P0701 can set by the following: fluid service/filter change, transmission service involving removing the pan, low fluid level caused by leaks, or after long
periods of storage.
Important: Replacement of the TCM will not likely correct a DTC P0701 or low main line pressure.
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.
