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GM-TechTSB Info please

cbsmith

By cbsmith
in Ask A GM Technician

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cbsmith Enthusiast

cbsmith

Posted
Posted

GM-Tech,

 

Can you please post the details of TSB #05-07-30-013 - 4L60-E/4L65-E Automatic Transmission Second Gear Start, Lack/Loss of Power When Accelerating from a Stop (Reprogram Powertrain Control Module (PCM)) - (May 9, 2005)

 

I think my truck is experiencing this and I would like to see the details of the TSB before I call the dealers.

 

Thanks.

GM-Tech Senior Enthusiast

GM-Tech

Posted
Posted

4L60-E/4L65-E Automatic Transmission Second Gear Start, Lack/Loss of Power When Accelerating from a Stop (Reprogram Powertrain Control Module (PCM)) #05-07-30-013 - (May 9, 2005)

 

2004-2005 Cadillac Escalade

 

2004-2005 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe

 

2004-2005 GMC Savana, Sierra, Yukon

 

2004-2005 HUMMER H2

 

with 4L60-E (RPO M30) or 4L65-E (RPO M32) Automatic Transmission

 

Condition

Some customers may comment on a slip on launch, low power on a launch or a second gear start when accelerating from a stop.

 

This condition is usually very intermittent, occurring only once in a few thousand miles of driving.

 

A Tech 2 or VDR snapshot of the event may show 2nd gear being commanded for approximately two seconds, then 1st gear commanded as would be expected.

 

Cause

 

This condition may be caused by an intermittent VSS signal, which causes the PCM to command second gear.

 

Important: There are other conditions that can cause the transmission to start in a gear higher than first. The following are a few of these conditions.

 

 

• Some DTCs can cause the transmission to start in a higher gear. Check for the presence of DTCs and repair as appropriate before proceeding.

 

• Debris on top of the spacer plate or in the valve body or a leaking shift solenoid can cause a 4L60-E or 4L65-E transmission to start in a gear higher than first. A start in a higher gear caused by any of these conditions typically occurs with much greater frequency. Refer to Service Bulletin 01-07-30-036D or newer for diagnostic information of these conditions.

 

• Placing the shift lever in the D2 position will cause a 4L60-E or 4L65-E transmission to start in second gear.

 

 

Correction

 

Important:

 

• This bulletin ONLY applies to 2004-2005 models year vehicles listed above.

 

• Some DTCs can cause the transmission to start in a higher gear. Check for the presence of DTCs and repair as appropriate before proceeding.

 

 

Using a scan tool, check for the presence of DTCs. If DTCs are present, refer to the appropriate SI Document before proceeding with this calibration.

Important: These calibrations also contain the 2-3 shift clunk calibration as detailed in bulletin 05-07-30-012.

 

 

Technicians are to reprogram the PCM with an updated software calibration. This new service calibration was released with TIS satellite data update version 5 or later available May 1, 2005. Refer to Service Programming System (SPS) in Vehicle Control Systems in the appropriate SI Document.

 

Warranty Information

For vehicles repaired under warranty, use:

 

Labor Operation

Description

Labor Time

 

J6355

Module, Powertrain Control - Transmission Reprogramming

Use Current Published Labor Time

 

 

 

 

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

 

 

© Copyright General Motors Corporation. All Rights Reserved.

bigdogxx Enthusiast

bigdogxx

Posted
Posted

This tsb does not i repeat does not fix this issue, i have it on my truck and all updates have been done to it and on occasion it still does it.There is also a post in the main part of the forums where many of us with 04's and 05's are having the same problems that we keep getting the run around about it being normal conditions :chevy: !Best thing to do is take it to the dealer so it is stored in there info so when this normal condition screws the tranny up it will be on chevys dime!

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