P060C on GMC vehicles

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.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns GMC filed with NHTSA whose summary names P060C. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIP5933 Service bulletin
  2023-06-30 · Communication — Manufacturer Telematics
• This Preliminary information communicates to the dealer technician that there is an ECM calibration available to address the DTC P060C on the 2024 Duramax 6.6 L5P.
• PIP5950 Service bulletin
  2023-11-14 · Power Train — Automatic Transmission
• This Preliminary information communicates DTCs P060C and/or P060D may set during an attempted SFL.
• 24-NA-058 Service bulletin
  2024-04-16 · Electrical System
• This service bulletin provides a service procedure to correct a customer concern of the Malfunction Indicator Lamp (MIL) Illuminated - DTC P062F, P040B, P041B, P0422, P060C, P062B, P1428, P142A, P20EE, P20FE, P22F9, P244A, and/or P244B Set.
• PIP5950A Service bulletin
  2025-03-26 · Unknown Or Other
• This Preliminary information communicates DTCs P060C and/or P060D may set during an attempted SFL.
• PIT6110F Service bulletin
  2025-04-18 · Unknown Or Other
• This Preliminary information communicates an issue with the SES MIL and DTC P062B /P060C  and engineering is currently investigating.
• PIP6066 Service bulletin
  2025-05-17 · Unknown Or Other
• This PI communicates to dealer technicians that DTC P060C is under investigation and to clear the DTC and return the vehicle to the customer.
• PIT6110G Service bulletin
  2025-06-12 · Unknown Or Other
• This Preliminary information communicates an issue with the SES MIL and DTC P062B P060C and engineering is currently investigating.
• PIT6110G Service bulletin
  2025-06-12 · Unknown Or Other
• This Preliminary information communicates an issue with the SES MIL and DTC P062B P060C and engineering is currently investigating.
• 23-NA-025 Service bulletin
  2023-02-17 · Engine And Engine Cooling
• This technical bulletin provides repair information to correct a customer concern of Engine Control Module Software Anomalies with MIL Illuminated and DTC P060C Set.
• 23-NA-025 Service bulletin
  2023-04-13 · Engine And Engine Cooling
• This technical bulletin provides repair information to correct a customer concern of Engine Control Module Software Anomalies with MIL Illuminated and DTC P060C Set.
• PIE0821 Service bulletin
  2025-03-20 · Engine
• This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regard to the Malfunction Indicator Lamp (MIL) illuminated on the Driver Information Center (DIC), DTC P060C Set.

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.