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Diagnostic trouble code · Chevrolet

C056E on Chevrolet vehicles

C056E is named on 13 Chevrolet model years (2018–2022): 53 manufacturer filings and 0 owner reports in NHTSA’s files, across Traverse, Blazer, Silverado, Silverado 2500HD, Silverado 3500HD.

Chassis 13 model years 53 manufacturer filings

Which Chevrolet model years name C056E

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2019 Chevrolet TraverseParking Brake8—
2018 Chevrolet TraverseParking Brake8—
2019 Chevrolet BlazerParking Brake7—
2019 Chevrolet SilveradoParking Brake7—
2022 Chevrolet BlazerParking Brake3—
2022 Chevrolet TraverseElectrical System3—
2021 Chevrolet BlazerParking Brake3—
2021 Chevrolet SilveradoParking Brake3—
2021 Chevrolet TraverseElectrical System3—
2020 Chevrolet BlazerElectrical System3—
2020 Chevrolet TraverseParking Brake3—
2022 Chevrolet Silverado 2500HDParking Brake1—
2022 Chevrolet Silverado 3500HDParking Brake1—

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.

Parking Brake 28 Equipment 15 Electrical System 6 Service Brakes 2
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Chevrolet filings that name C056E

Source: NHTSA manufacturer communications

Bulletins and campaigns Chevrolet filed with NHTSA whose summary names C056E. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What C056E means

Source: SAE J2012 / OBD-II

C056E 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 C056E a known problem on Chevrolet vehicles?

It is a documented one: NHTSA's files hold 53 manufacturer filings and 0 owner reports naming C056E on 13 Chevrolet model years (2018–2022). 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 Chevrolet models does C056E appear on most?

2019 Traverse (8 documents), 2018 Traverse (8 documents), 2019 Blazer (7 documents).

Does C056E 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.