U0073 CHEVROLET - Control Module Communication Bus OFF
U0073 CHEVROLET Possible Causes
- Faulty CAN communication system
- CAN System harness is open or shorted
- CAN System circuit poor electrical connection
First diagnose U0073 CHEVROLET 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.
U0073 CHEVROLET Tech NotesThere 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
Chevrolet Factory Service Bulletin OBDII Code U0073
Cost of diagnosing the U0073 CHEVROLET code
Labor: 1.0The cost of diagnosing the U0073 CHEVROLET 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.
U0073 CHEVROLET Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
U0073 Chevrolet DescriptionModules 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.
U0073 CHEVROLET More InformationNeed more information on how to fix the U0073 CHEVROLET code?
Get Access to Factory Service Manuals
Need more help?Get the U0073 Chevrolet code diagnosed by a professional: Find a repair shop in your area
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