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Diagnostic trouble code · Chevrolet

U0020 on Chevrolet vehicles

U0020 is named on 11 Chevrolet model years (2017–2020): 53 manufacturer filings and 0 owner reports in NHTSA’s files, across Suburban, Tahoe, Silverado, Silverado 2500HD.

Network 11 model years 53 manufacturer filings

Which Chevrolet model years name U0020

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2017 Chevrolet SuburbanEquipment8—
2017 Chevrolet TahoeEquipment8—
2018 Chevrolet SuburbanEquipment Adaptive/Mobility6—
2018 Chevrolet TahoeEquipment6—
2017 Chevrolet SilveradoElectrical System5—
2019 Chevrolet Silverado 2500HDElectrical System4—
2019 Chevrolet SuburbanEquipment4—
2019 Chevrolet TahoeElectrical System4—
2018 Chevrolet SilveradoEquipment4—
2020 Chevrolet SuburbanElectrical System2—
2020 Chevrolet TahoeElectrical System2—

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.

Electrical System 22 Equipment 17 Suspension 4 Equipment Adaptive/Mobility 3
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Chevrolet filings that name U0020

Source: NHTSA manufacturer communications

Bulletins and campaigns Chevrolet filed with NHTSA whose summary names U0020. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What U0020 means

Source: SAE J2012 / OBD-II

U0020 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 Chevrolet and its owners have filed about it; the code’s page across every make has the whole file.

From here

Common questions

Source: NHTSA files and the OBD-II standard

Is U0020 a known problem on Chevrolet vehicles?

It is a documented one: NHTSA's files hold 53 manufacturer filings and 0 owner reports naming U0020 on 11 Chevrolet model years (2017–2020). 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 Chevrolet models does U0020 appear on most?

2017 Suburban (8 documents), 2017 Tahoe (8 documents), 2018 Suburban (6 documents).

Does U0020 on a Chevrolet 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.