P0333 on GMC vehicles
P0333 is named on 6 GMC model years (2016–2019): 17 manufacturer filings and 0 owner reports in NHTSA’s files, across Yukon, Sierra, Sierra 2500HD, Sierra 3500HD.
Which GMC model years name P0333
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2018 GMC Yukon | Electrical System | 7 | — |
| 2018 GMC Sierra | Electrical System | 4 | — |
| 2018 GMC Sierra 2500HD | Exterior Lighting | 2 | — |
| 2017 GMC Sierra 2500HD | Exterior Lighting | 2 | — |
| 2019 GMC Sierra 3500HD | Electrical System | 1 | — |
| 2016 GMC Sierra 3500HD | Parking Brake | 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 P0333
Source: NHTSA manufacturer communicationsBulletins and campaigns GMC filed with NHTSA whose summary names P0333. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 20NA207 Service bulletin2020-10-06 · Electrical System
- This service bulletin informs the technician to inspect for a possible electrical concern at the ECM X2 electrical connector to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated - DTC P0333 Set.
- 20-NA-207 Service bulletin2022-03-03 · Parking Brake — Electrical — Control Module
- This service bulletin informs the technician to inspect for a possible electrical concern at the ECM X2 electrical connector to correct a customer concern of Malfunction Indicator Lamp (MIL) Illuminated - DTC P0333 Set.
- PIP5576 Service bulletin2018-09-19 · Power Train — Manual Transmission
- This Preliminary information communicatesSES lamp, setting DTC P0333 when shifting the Transmissionfrom park. DTC P0333 cansetdue to voltage from the Transmission park/neutral signal 1circuit bleeding into the knock sensor system circuits. If SI does not isolate the concern inspect the K20 ECM connector X2 looking for debris, connectorand or terminal concerns.
What P0333 means
Source: SAE J2012 / OBD-IIP0333 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 P0333 a known problem on GMC vehicles?
It is a documented one: NHTSA's files hold 17 manufacturer filings and 0 owner reports naming P0333 on 6 GMC model years (2016–2019). 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 P0333 appear on most?
2018 Yukon (7 documents), 2018 Sierra (4 documents), 2018 Sierra 2500HD (2 documents).
Does P0333 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.