P2C8A on GMC vehicles
P2C8A is named on 6 GMC model years (2023–2026): 22 manufacturer filings and 0 owner reports in NHTSA’s files, across Hummer EV, Sierra.
Which GMC model years name P2C8A
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2025 GMC Hummer EV | Not specified | 5 | — |
| 2024 GMC Hummer EV | Not specified | 5 | — |
| 2026 GMC Sierra | Not specified | 3 | — |
| 2025 GMC Sierra | Not specified | 3 | — |
| 2024 GMC Sierra | Not specified | 3 | — |
| 2023 GMC Hummer EV | Not specified | 3 | — |
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.
GMC filings that name P2C8A
Source: NHTSA manufacturer communicationsBulletins and campaigns GMC filed with NHTSA whose summary names P2C8A. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIP6081 Service bulletin2025-08-22 · Unknown Or Other
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, U3581, U3582, U3583, U3584, U2BAA, U2BAB, U2BAC, U2BAD, U2BAE,
- PIP6081B Service bulletin2026-02-23 · Unknown Or Other
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, U3581, U3582, U3583, U3584, U2BAA, U2BAB, U2BAC, U2BAD, U2BAE,
- PIP6081C Service bulletin2026-07-14 · Unknown Or Other
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, U3581, U3582, U3583, U3584, U2BAA, U2BAB, U2BAC, U2BAD, U2BAE,
What P2C8A means
Source: SAE J2012 / OBD-IIP2C8A sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
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.
Common questions
Source: NHTSA files and the OBD-II standardIs P2C8A a known problem on GMC vehicles?
It is a documented one: NHTSA's files hold 22 manufacturer filings and 0 owner reports naming P2C8A on 6 GMC model years (2023–2026). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which GMC models does P2C8A appear on most?
2025 Hummer EV (5 documents), 2024 Hummer EV (5 documents), 2023 Hummer EV (3 documents).
Does P2C8A on a GMC mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.