U Code Definitions

• Clicking relays, Instrument Panel blinking – Chevrolet Equinox
• Code readers and scan tools
• GM U Code Definitions
• U0001-High Speed CAN Communication Bus
• U0101 Lost Communication with TCM
• U0140 Lost Communication With Body Control Module
• U2105 CAN Bus Error ECM (GM specific code)
• U2106 Lost Comm with Trans Control System (GM specific)
• U2107 Lost Communications with Body Control System (GM specific code)