For Shop Owners

U0140 CHEVROLET - Lost Communication With Body Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Faulty Body Control Module
  • Body Control Module harness is open or shorted
  • Body Control Module circuit poor electrical connection
What does this mean?

Tech notes

There is a factory service bulletin for the following Chevrolet models:

2007-2010 Chevrolet Avalanche
2007-2010 Chevrolet Corvette
2007-2010 Chevrolet Silverado
2007-2010 Chevrolet Suburban
2007-2010 Chevrolet Tahoe
2008-2010 Chevrolet Silverado Hybrid
2008-2010 Chevrolet Tahoe Hybrid


What does this mean?

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U0140 CHEVROLET Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module.
OBDII Code U0140 Chevrolet - Lost Communication With Body Control Module - itimaster.ru

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U0140 CHEVROLET Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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