U0109 GMC - Lost Communication With Fuel Pump Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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U0109 GMC Possible Causes

  • Faulty Fuel Pump Control Module
  • Fuel Pump Control Module harness is open or shorted
  • Fuel Pump Control Module circuit poor electrical connection

First diagnose U0109 GMC code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

U0109 GMC Tech Notes

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

2007-2010 GMC Sierra
2007-2010 GMC Yukon Models
2008-2010 GMC Sierra Hybrid
2008-2010 GMC Yukon Hybrid

GMC Factory Service Bulletin OBDII Code U0109

Cost of diagnosing the U0109 GMC code

    Labor: 1.0

    The cost of diagnosing the U0109 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

U0109 GMC Possible Symptoms

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

U0109 Gmc 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 U0109 Gmc - Lost Communication With Fuel Pump Control Module  - AutoCodes.com

U0109 GMC More Information

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