U0155 on GMC vehicles A module has stopped hearing from the instrument cluster

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Bulletins and campaigns GMC filed with NHTSA whose summary names U0155. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• 21-NA-054 Service bulletin
  2022-10-20 · Electrical System — Instrument Cluster/Panel
• This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.
• 21-NA-054 Service bulletin
  2023-02-06 · Electrical System
• This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.
• 21-NA-054 Service bulletin
  2024-03-22 · Electrical System
• This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.
• PIT5586 Service bulletin
  2017-10-02 · Equipment — Other — Owners/Service/Other Manual
• This Preliminary information communicates a customer concern ofIPC gauges inoperative or fluctuate, No Start,No Crank,SIR Light / Service Airbag Message, Service Suspension Message,Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback,HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0
• PIT5586A Service bulletin
  2018-03-27 · Steering
• This Preliminary information communicates a customer concern ofIPC gauges inoperative or fluctuate, No Start,No Crank,SIR Light / Service Airbag Message, Service Suspension Message,Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback,HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0
• PIT5586B Service bulletin
  2018-08-27 · Engine
• This Preliminary information communicates a customer concern ofIPC gauges inoperative or fluctuate, No Start,No Crank,SIR Light / Service Airbag Message, Service Suspension Message,Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback,HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B3980, U0
• PIT5586C Service bulletin
  2019-06-24 · Equipment — Electrical
• This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B398
• PIT5586D Service bulletin
  2020-03-11 · Electrical System
• This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B398
• PIT5586E Service bulletin
  2020-10-01 · Electrical System
• This Preliminary information communicates a customer concern of IPC gauges inoperative or fluctuate, No Start, No Crank, SIR Light / Service Airbag Message, Service Suspension Message, Radio display blank, Steering Wheel Controls (SWC) not illuminated, Turn Signal no audible feedback, HVAC controls inoperative. During diagnostics a technician may find any of the following DTC's: B1011, B1370, B398
• 20NA021 Service bulletin
  2020-01-29 · Steering
• This technical bulletin provides repair information to correct a customer concern of Intermittent "Service Steering Column Lock" message displayed with U0155 Set.
• 21-NA-054 Service bulletin
  2024-04-22 · Electrical System
• This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.

A stored code names the test that failed, never the part that caused it. The record above is what GMC and its owners have filed about it; the code’s page across every make has the whole file.