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Home›Trouble codes›P0204› GMC
Diagnostic trouble code · GMC

P0204 on GMC vehicles

P0204 is named on 5 GMC model years (2020–2022): 39 manufacturer filings and 0 owner reports in NHTSA’s files, across Yukon, Sierra.

Powertrain 5 model years 39 manufacturer filings

Which GMC model years name P0204

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2021 GMC YukonElectrical System12—
2022 GMC YukonEngine10—
2021 GMC SierraElectrical System7—
2022 GMC SierraEngine5—
2020 GMC SierraElectrical System5—

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.

Engine 20 Electrical System 13 Fuel/Propulsion System 5 Equipment 1
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GMC filings that name P0204

Source: NHTSA manufacturer communications

Bulletins and campaigns GMC filed with NHTSA whose summary names P0204. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What P0204 means

Source: SAE J2012 / OBD-II

P0204 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.

From here
Get a model's new bulletins by email See what owners reported Look up a bulletin by its number Watch a VIN for new recalls

Common questions

Source: NHTSA files and the OBD-II standard

Is P0204 a known problem on GMC vehicles?

It is a documented one: NHTSA's files hold 39 manufacturer filings and 0 owner reports naming P0204 on 5 GMC model years (2020–2022). 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 P0204 appear on most?

2021 Yukon (12 documents), 2022 Yukon (10 documents), 2021 Sierra (7 documents).

Does P0204 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.

Where to go next

pages beside this code
Filed alongside P0202 Another code that appears in the same filings and owner reports as P0204.Filed alongside P0201 Another code that appears in the same filings and owner reports as P0204.Vehicle 2021 GMC Yukon The model year P0204 is filed against most often.The data Trouble codes by API GET /v1/dtc joins every code to bulletins and owner reports — free tier, no card.