C1172 on GMC vehicles
C1172 is named on 5 GMC model years (2024–2026): 12 manufacturer filings and 0 owner reports in NHTSA’s files, across Acadia, Canyon, Savana.
Which GMC model years name C1172
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2024 GMC Acadia | Electrical System | 6 | — |
| 2025 GMC Acadia | Electrical System | 3 | — |
| 2026 GMC Acadia | Electrical System | 1 | — |
| 2024 GMC Canyon | Wheels | 1 | — |
| 2024 GMC Savana | Electrical System | 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 C1172
Source: NHTSA manufacturer communicationsBulletins and campaigns GMC filed with NHTSA whose summary names C1172. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 24-NA-166 Service bulletin2024-09-06 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Sensor Unable to Relearn Ethernet Cable Overlay for TCP OnStar Module.
- 24-NA-166 Service bulletin2024-10-15 · Unknown Or Other
- This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Sensor Unable to Relearn Ethernet Cable Overlay for TCP OnStar Module.
- 24-NA-166 Service bulletin2024-10-26 · Wheels
- This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Sensor Unable to Relearn Ethernet Cable Overlay for TCP OnStar Module.
- 24-NA-166 Service bulletin2025-01-13 · Wheels
- This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Sensor Unable to Relearn Ethernet Cable Overlay for TCP OnStar Module.
- 24-NA-166 Service bulletin2025-05-01 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Sensor Unable to Relearn Ethernet Cable Overlay for TCP OnStar Module.
- 24-NA-166 Service bulletin2025-11-07 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of DTC C1171 C1172 C1173 C1174 Tire Pressure Monitor Sensor Unable to Relearn Ethernet Cable Overlay for TCP OnStar Module.
What C1172 means
Source: SAE J2012 / OBD-IIC1172 is a manufacturer-specific code: the second character is a 1, 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 C1172 a known problem on GMC vehicles?
It is a documented one: NHTSA's files hold 12 manufacturer filings and 0 owner reports naming C1172 on 5 GMC model years (2024–2026). 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 C1172 appear on most?
2024 Acadia (6 documents), 2025 Acadia (3 documents), 2026 Acadia (1 document).
Does C1172 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.