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2007 Gmc Sierra Nbs Ecm/tcm Updates

BigRedTruck

By BigRedTruck
in Ask A GM Technician

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BigRedTruck

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I have a new 2007 GMC Sierra ext Cab, 6.0L, which was built some time early May 2007.

I'm not sure if my truck has this version or an earlier version of ECM/TCM code.

:) Is there any way from a end user that we can see what version of code is loaded through the information center internal to the vehicle?

 

Thanks

 

 

See TSB Below:

#########################################################

 

QUOTE(GeoHawk @ Jun 26 2007, 03:04 PM) *

Actually it looks like there is a TSB for this condition. I'd wait a few hundred more miles to see if things smooth out, but if it's still doing it take it in to have the ECM/TCM reprogrammed:

 

 

 

Document ID# 1969002

2007 Chevrolet Silverado - 4WD

 

--------------------------------------------------------------------------------

 

Subject: L76 4L60-E, 4L70-E Chuggle, Surge or Hesitation May be Felt with Active Fuel Management System Cylinder Deactivation Transition from V8 Mode to V4 Mode (Reprogram ECM and TCM) #07-06-04-013 - (05/04/2007)

 

Models: 2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe

 

2007 GMC Sierra, Yukon, Yukon XL

 

with Active Fuel Management System Vortec® GEN IV 6.0L V8 Engine (VIN Y -- RPO L76)

 

and

 

HYDRA-MATIC® 4L60-E, 4L70-E Transmission (RPOs M30, M70)

 

--------------------------------------------------------------------------------

 

Condition

Some customers may comment on a chuggle, surge or hesitation felt during an Active Fuel Management System (AFM) cylinder deactivation transition point .

 

Correction

Before reprogramming the ECM and TCM, compare the vehicle to a like vehicle. This may be a normal condition for an Active Fuel Management System equipped vehicle and no repairs should be attempted. The vehicle you are evaluating may be a little harsh in AFM transition. A calibration update was released for the ECM and TCM to soften the feel of the AFM transition.

 

SPS Information

• ECM -- New calibration to address customer concern of bump during active fuel management transitions. Must also program TCM with latest calibrations.

 

• TCM -- New operating system and calibrations to improve engine performance and shift quality. You must also program the ECM with latest calibrations.

 

Reprogram the ECM and TCM with the latest calibrations if the above concern is encountered. Updated ECM and TCM calibrations are now available to address this concern. These calibrations, or any that follow, are designed to address this concern. Refer to Service Programming System (SPS) using the appropriate Service Information (SI) procedures. The new ECM and TCM calibrations will be available to dealerships as part of TIS2000 incremental satellite update version 4.5, for 2007 (available on 04/23/07), and on TIS DVD version 5.0/2007 or later, which will be mailed to dealers on 05/09/2007. If you cannot access the calibration, call the Techline Customer Support Center and it will be provided. As always, make sure your Tech 2® is updated with the latest software version.

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