⌘K
Find a vehicleRecallsCompareNewsPricing
Look one up
VIN decoderTrouble codesProblems by systemService bulletinsInvestigations
Browse the record
GuidesRankingsAll makesDriver-assist crashesWhat is in the dataWarranty extensions
Tools & data
Recall WatchFleet VIN checkRecall disclosure formCar crosswordCost calculatorsTitle brandsAPI & data
Account
Sign inGarage
Home›Trouble codes›U0126› GMC
Diagnostic trouble code · GMC

U0126 on GMC vehicles

U0126 is named on 10 GMC model years (2016–2019): 70 manufacturer filings and 0 owner reports in NHTSA’s files, across Yukon, Sierra, Sierra 2500HD, Sierra 3500HD, Terrain.

Network 10 model years 70 manufacturer filings

Which GMC model years name U0126

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2016 GMC YukonSteering18—
2017 GMC YukonElectrical System13—
2016 GMC SierraEquipment11—
2017 GMC SierraElectrical System8—
2018 GMC YukonVisibility/Wiper5—
2019 GMC YukonSuspension4—
2016 GMC Sierra 2500HDVisibility/Wiper4—
2019 GMC Sierra 2500HDSuspension3—
2019 GMC Sierra 3500HDSuspension2—
2016 GMC TerrainEquipment2—

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 17 Steering 11 Equipment 11 Suspension 7
Advertisement

GMC filings that name U0126

Source: NHTSA manufacturer communications

Bulletins and campaigns GMC filed with NHTSA whose summary names U0126. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What U0126 means

Source: SAE J2012 / OBD-II

U0126 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 U0126 a known problem on GMC vehicles?

It is a documented one: NHTSA's files hold 70 manufacturer filings and 0 owner reports naming U0126 on 10 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 U0126 appear on most?

2016 Yukon (18 documents), 2017 Yukon (13 documents), 2016 Sierra (11 documents).

Does U0126 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 P0300 Another code that appears in the same filings and owner reports as U0126.Filed alongside B3055 Another code that appears in the same filings and owner reports as U0126.Vehicle 2016 GMC Yukon The model year U0126 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.