P25A2 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 P25A2. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIT6012 Service bulletin
  2023-05-05 · Equipment — Electrical
• This Preliminary information communicates Diagnostic information for the Check Engine Light On, Spongy Brake Pedal Feel, Codes C05D3 and P25A2 Stored.
• PIT6012A Service bulletin
  2024-03-22 · Equipment — Electrical
• This Preliminary information communicates Diagnostic information for the Check Engine Light On, Spongy Brake Pedal Feel, Codes C05D3 and P25A2 Stored.
• PIT6522 Service bulletin
  2026-06-10 · Unknown Or Other
• This PI advises dealers that if the K160 Brake System Control Module sets DTC P0606 along with P0562 and/or P25A2, additional diagnostic aids should be followed before replacing parts. The PI provides guidance to inspect for low voltage conditions, wiring, terminal concerns, and module communication issues that may cause false or intermittent EBCM DTCs.

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.