Engine-Codes - Gmc - U0001 GMC

U0001 GMC Code - High Speed CAN Communication Bus Malfunction

- Code Popularity: 1,996 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the U0001 GMC Code?

  • Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s)
  • Check for more codes
  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

|How to Fix the U0001 GMC Code?

Start by checking 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 connector's pins.

|U0001 GMC code tech notes

Controller Area Network (CAN)

|What is the cost to diagnose the U0001 GMC code?

Labor: 1.0

The cost to diagnose the U0001 GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are U0001 GMC code possible symptoms?

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

|What Does the U0001 GMC Code Mean?

Devices connected to the General Motors Local Area Network (GMLAN) serial data circuits monitor for serial data communications on the GMLAN network during normal vehicle operation. Operating information and commands are exchanged among the devices. Each device on GMLAN network maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and will decrease with error-free messages. If the transmit error counter value exceeds 255 the device removes itself from the network and a Diagnostic Trouble Code (DTC) U0001 will be set.

High Speed CAN Communication Bus Malfunction

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