P20E8 on GMC vehicles
P20E8 is named on 11 GMC model years (2021–2024): 28 manufacturer filings and 0 owner reports in NHTSA’s files, across Yukon, Sierra, Sierra 2500HD, Sierra 3500HD.
Which GMC model years name P20E8
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2023 GMC Yukon | Engine | 6 | — |
| 2024 GMC Yukon | Engine | 4 | — |
| 2024 GMC Sierra 2500HD | Electrical System | 2 | — |
| 2024 GMC Sierra 3500HD | Electrical System | 2 | — |
| 2023 GMC Sierra | Electrical System | 2 | — |
| 2023 GMC Sierra 2500HD | Engine | 2 | — |
| 2023 GMC Sierra 3500HD | Engine | 2 | — |
| 2022 GMC Sierra 2500HD | Engine | 2 | — |
| 2022 GMC Sierra 3500HD | Electrical System | 2 | — |
| 2021 GMC Sierra 2500HD | Engine | 2 | — |
| 2021 GMC Sierra 3500HD | Electrical System | 2 | — |
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 P20E8
Source: NHTSA manufacturer communicationsBulletins and campaigns GMC filed with NHTSA whose summary names P20E8. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 24-NA-020 Service bulletin2024-02-12 · Engine And Engine Cooling
- This service bulletin provides a repair procedure to correct customer concerns of Service Emissions System Displayed on DIC, MIL Illuminated with DTC P249C and/or P20E8 Set.
- 24-NA-020 Service bulletin2024-02-23 · Engine And Engine Cooling
- This service bulletin provides a repair procedure to correct customer concerns of Service Emissions System Displayed on DIC, MIL Illuminated with DTC P249C and/or P20E8 Set.
What P20E8 means
Source: SAE J2012 / OBD-IIP20E8 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 P20E8 a known problem on GMC vehicles?
It is a documented one: NHTSA's files hold 28 manufacturer filings and 0 owner reports naming P20E8 on 11 GMC model years (2021–2024). 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 P20E8 appear on most?
2023 Yukon (6 documents), 2024 Yukon (4 documents), 2023 Sierra (2 documents).
Does P20E8 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.