PIP-4379-D
Service Bulletin Details
Public Details for: PIP-4379-D
Chevrolet/gmc: delayed or no drive and delayed or no reverse with dtc's, range inhibit. Model years 2001-2013. *pe updated on 06/08/2011. *kb updated on 06/16/2011. *kb updated 11/26/12. *pe updated 12/4/2013 *js
- 2014 - 2011 - 2010 - 2009 - 2008 - 2007 - 2006 - 2005 - 2004 - 2003 -
Models from 2014
2014 CHEVROLET SILVERADO |
2014 GMC SIERRA |
Models from 2011
2011 CHEVROLET SILVERADO 1500 |
Models from 2010
2010 CHEVROLET SILVERADO |
2010 GMC SIERRA |
Models from 2007
2007 CHEVROLET KODIAK |
2007 CHEVROLET SILVERADO |
2007 CHEVROLET SILVERADO CLASSIC |
2007 GMC SIERRA |
2007 GMC SIERRA CLASSIC |
2007 GMC TOPKICK |
Models from 2006
2006 CHEVROLET KODIAK |
2006 CHEVROLET SILVERADO CLASSIC |
2006 GMC SIERRA CLASSIC |
2006 GMC TOPKICK |
Models from 2005
2005 CHEVROLET KODIAK |
2005 CHEVROLET SILVERADO CLASSIC |
2005 GMC SIERRA CLASSIC |
2005 GMC TOPKICK |
Models from 2004
2004 CHEVROLET KODIAK |
2004 CHEVROLET SILVERADO CLASSIC |
2004 GMC SIERRA CLASSIC |
2004 GMC TOPKICK |
Models from 2003
2003 CHEVROLET KODIAK |
2003 CHEVROLET SILVERADO CLASSIC |
2003 GMC SIERRA CLASSIC |
2003 GMC TOPKICK |
SB-10036204-2521 File in Section: Service Bulletin Bulletin No.: Date: PIP4379J September, 2012 PRELIMINARY INFORMATION Subject: Delayed Or No Drive And Or Delayed Or No Reverse With DTC’s Range Inhibit Models: 2007 - 2013 Chevrolet Silverado 2003 - 2010 Chevrolet Kodiak 2001 - 2007 Chevrolet Silverado Classic 2007 - 2013 GMC Sierra 2003 - 2010 GMC Topkick 2001 - 2007 GMC Sierra Classic Equipped with The Allison LCT1000 Transmission RPO M74 or MW7 This PI was superseded to update model and model years. Please discard PIPIP4379H. 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 and or a range inhibit with any one of or a combination of the following DTC's P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723. This condition may be more pronounced in cold climates during a cold start. Recommendation/Instructions: P0701, P0731, P0732, P0733. P0734. P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 could possibly indicate 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 DTC's is accompanied by a P0701 begin troubleshooting with the SI for P0701 first. Be sure to follow all diagnostic steps. With any of the above listed DTC's follow the SI fluid checking procedure to PROPERLY check the transmission fluid level using the Hot Check Procedure. Low fluid level may cause one of or a combination of the listed DTC's to set, particularly during a cold ambient and cold vehicle start. Note: Ensure the fluid level is at the top of the HOT band when the transmission fluid temperature is 175°F. Refer to SI document 2408059 for the proper fluid level checking procedure. DTC P0701, P0731, P0732, P0733. P0734. P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 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. Note: If the fluid level has been properly checked using the HOT check procedure listed in SI document 2408059 and any of the DTCs reset during a cold start inspect the internal suction filter for possible cracks. Note: If no other concerns are found inspect for a stuck lube regulator valve (item 13 in document 2384492) in the pump cover due to debris. DTC P0894 diagnostics will run during NLT (neutral lock turbine). During NLT the transmission applies 3, 5 and Reverse clutch and 2, 6 clutch, in conjunction with Low & Reverse clutch already applied to lock turbine shaft. This feature is only active in combination when engine elevated idle is active to shorten engine and cab warm up time. This feature is initiated if transmission sump temperature is greater than -25°C (-13°F) and the engine coolant temperature (ECT) is greater than -40°C (-40°F). If the transmission sump temperature is greater than 60°C (140°F) or the engine coolant temperature is greater than 60°C (140°F), the NLT feature will terminate. Important: Replacement of the TCM will not likely correct any of the above DTC's 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. SB-10036204-4657 File In Section: Bulletin No.: Date: Service Bulletin PIP4379F March, 2011 PRELIMINARY INFORMATION Subject: Delayed or No Drive And or Delayed or No Reverse With DTC’s, Range Inhibit Models: 2007-2011 Chevrolet Silverado 2003-2010 Chevrolet Kodiak 2001-2007 Chevrolet Silverado Classic 2007-2011 GMC Sierra 2003-2010 GMC Topkick 2001-2007 GMC Sierra Classic Equipped with The Allison LCT1000 Transmission RPO M74 or MW7 This PI was superseded to update DTCs. Please discard PIP4379E. 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 and or a range inhibit with any one of or a combination of the following DTC’s P0701, P0731, P0732, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723. This condition may be more pronounced in cold climates during a cold start. Recommendation/Instructions: P0701, P0731, P0732, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 could possibly indicate 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 DTC’s are accompanied by a P0701 begin troubleshooting with the SI for P0701 first. Be sure to follow all diagnostic steps. With any of the above listed DTC’s follow the SI fluid checking procedure to PROPERLY check the transmission fluid level using the Hot Check Procedure. Low fluid level may cause one of or a combination of the listed DTC’s to set, particularly during a cold ambient and cold vehicle start. Note: Ensure the fluid level is at the top of the HOT band when the transmission fluid temperature is 175°F. Refer to SI document 2408059 for the proper fluid level checking procedure. DTC P0701, P0731, P0732, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 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. Note: If the fluid level has been properly checked using the HOT check procedure listed in SI document 2408059 and any of the DTCs reset during a cold start inspect the internal suction filter for possible cracks. DTC P0894 diagnostic’s will run during NLT (neutral lock turbine). During NLT the transmission applies 3, 5 and Reverse clutch and 2, 6 clutch, in conjunction with Low & Reverse clutch already applied to lock turbine shaft. This feature is only active in combination when engine elevated idle is active to shorten engine and cab warm up time. This feature is initiated if transmission sump temperature is greater than -25°C (-13°F) and the engine coolant temperature (ECT) is greater than -40°C (-40°F). If the transmission sump temperature is greater than 60°C (140°F) or the engine coolant temperature is greater than 60°C (140°F), the NLT feature will terminate. Important: Replacement of the TCM will not likely correct any of the above DTC’s or low main line pressure. Copyright 2011 General Motors. All Rights Reserved. Page 2 March, 2011 SB-10036204-4657 Bulletin No.: PIP4379F 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. SB-10036204-5001 File in Section: Service Bulletin Bulletin No.: Date: PIP4379K October, 2013 PRELIMINARY INFORMATION Subject: Delayed Or No Drive And Or Delayed Or No Reverse With DTCs, Range Inhibit Models: 2007-2014 Chevrolet Silverado 2003-2010 Chevrolet Kodiak 2001-2007 Chevrolet Silverado Classic 2007-2014 GMC Sierra 2003-2010 GMC Topkick 2001-2007 GMC Sierra Classic Equipped with The Allison LCT1000 Transmission RPO M74 or MW7 This PI was superseded to update model years. Please discard PIP4379J. 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 and or a range inhibit with any one of or a combination of the following DTCs P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723. This condition may be more pronounced in cold climates during a cold start. Recommendation/Instructions P0701, P0731, P0732, P0733. P0734. P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 could possibly indicate 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. With any of the above listed DTCs follow the SI fluid checking procedure to PROPERLY check the transmission fluid level using the Hot Check Procedure. Low fluid level may cause one of or a combination of the listed DTCs to set, particularly during a cold ambient and cold vehicle start. Note: Ensure the fluid level is at the top of the HOT band when the transmission fluid temperature is 175°F. Refer to SI document 2408059 for the proper fluid level checking procedure. DTC P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 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. Note: If the fluid level has been properly checked using the HOT check procedure listed in SI document 2408059 and any of the DTCs reset during a cold start inspect the internal suction filter for possible cracks. Note: If no other concerns are found inspect for a stuck lube regulator valve (item 13 in document 2384492) in the pump cover due to debris. DTC P0894 diagnostics will run during NLT (neutral lock turbine). During NLT the transmission applies 3, 5 and Reverse clutch and 2, 6 clutch, in conjunction with Low & Reverse clutch already applied to lock turbine shaft. This feature is only active in combination when engine elevated idle is active to shorten engine and cab warm up time. This feature is initiated if transmission sump temperature is greater than -25°C (-13°F) and the engine coolant temperature (ECT) is greater than -40°C (-40°F). If the transmission sump temperature is greater than 60°C (140°F) or the engine coolant temperature is greater than 60°C (140°F), the NLT feature will terminate. Important: Replacement of the TCM will not likely correct any of the above DTCs 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. SB-10036204-7706 SB-10036204-7706 SB-10036204-9063