P30C7 on GMC vehicles
P30C7 is named on 6 GMC model years (2020–2024): 20 manufacturer filings and 0 owner reports in NHTSA’s files, across Sierra, Canyon.
Which GMC model years name P30C7
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2022 GMC Sierra | Electrical System | 5 | — |
| 2021 GMC Sierra | Electrical System | 5 | — |
| 2020 GMC Sierra | Exterior Lighting | 5 | — |
| 2023 GMC Sierra | Exterior Lighting | 3 | — |
| 2024 GMC Canyon | Exterior Lighting | 1 | — |
| 2023 GMC Canyon | Exterior Lighting | 1 | — |
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 P30C7
Source: NHTSA manufacturer communicationsBulletins and campaigns GMC filed with NHTSA whose summary names P30C7. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- PIP5843 Service bulletin2022-03-03 · Electrical System
- This Preliminary information communicates to the dealers information related to a Malfunction Indicator Lamp (MIL) Illuminated During Cold Ambient Temperatures with DTCs P30C3 and/or P30BF P30C7 P30CB Setting.
- PIP5843A Service bulletin2022-12-05 · Electrical System
- This Preliminary information communicates to the dealers information related to a Malfunction Indicator Lamp (MIL) Illuminated During Cold Ambient Temperatures with DTCs P30C3 and/or P30BF P30C7 P30CB Setting.
- PIP5843B Service bulletin2023-01-13 · Engine And Engine Cooling
- This Preliminary information communicates to the dealers information related to a Malfunction Indicator Lamp (MIL) Illuminated During Cold Ambient Temperatures with DTCs P30C3 and/or P30BF P30C7 P30CB Setting.
- PIP5843C Service bulletin2023-06-20 · Exterior Lighting
- This Preliminary information communicates to the dealers information related to a Malfunction Indicator Lamp (MIL) Illuminated During Cold Ambient Temperatures with DTCs P30C3 and/or P30BF P30C7 P30CB Setting.
- PIP5843D Service bulletin2024-03-06 · Exterior Lighting
- This Preliminary information communicates to the dealers information related to a Malfunction Indicator Lamp (MIL) Illuminated During Cold Ambient Temperatures with DTCs P30C3 and/or P30BF P30C7 P30CB Setting.
What P30C7 means
Source: SAE J2012 / OBD-IIP30C7 is a manufacturer-specific code: the second character is a 3, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
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 P30C7 a known problem on GMC vehicles?
It is a documented one: NHTSA's files hold 20 manufacturer filings and 0 owner reports naming P30C7 on 6 GMC model years (2020–2024). 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 P30C7 appear on most?
2022 Sierra (5 documents), 2021 Sierra (5 documents), 2020 Sierra (5 documents).
Does P30C7 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.