B2BA1 on GMC vehicles
B2BA1 is named on 6 GMC model years (2023–2025): 22 manufacturer filings and 0 owner reports in NHTSA’s files, across Yukon, Sierra, Hummer EV.
Which GMC model years name B2BA1
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2023 GMC Yukon | Electrical System | 9 | — |
| 2023 GMC Sierra | Electrical System | 4 | — |
| 2024 GMC Hummer EV | Electrical System | 3 | — |
| 2024 GMC Sierra | Electrical System | 3 | — |
| 2023 GMC Hummer EV | Forward Collision Avoidance | 2 | — |
| 2025 GMC Hummer EV | Electrical System | 1 | — |
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 B2BA1
Source: NHTSA manufacturer communicationsBulletins and campaigns GMC filed with NHTSA whose summary names B2BA1. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 24-NA-063 Service bulletin2024-03-27 · Equipment Adaptive/Mobility
- This technical bulletin provides repair information to correct a customer concern of a Service Drivers Assist Message Illuminated in DIC with DTC B2BA1 Set.
- 24-NA-063 Service bulletin2024-04-04 · Equipment
- This technical bulletin provides repair information to correct a customer concern of a Service Drivers Assist Message Illuminated in DIC with DTC B2BA1 Set.
- 24-NA-063 Service bulletin2024-06-14 · Electrical System
- This service bulletin provides repair information to correct a customer concern of a Service Drivers Assist Message Illuminated in DIC with DTC B2BA1 Set.
- PIT6000 Service bulletin2023-04-19 · Electrical System
- This Preliminary information communicates to the field how to address DTC: B2BA1 for Map module version being out of date and causing a Service Drivers Assist message.
- 24-NA-169 Service bulletin2024-08-27 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of SuperCruise Dropping Out After Driving 30–60 Seconds and/or Service Driver Assist Message Illuminated with DTCs U1626, U3000, and/or B2BA1.
- 24-NA-169 Service bulletin2024-09-09 · Forward Collision Avoidance — Adaptive Cruise Control
- This technical bulletin provides repair information to correct a customer concern of Super Cruise Dropping Out After Driving 30–60 Seconds and/or Service Driver Assist Message Illuminated with DTCs U1626, U3000, and/or B2BA1.
- 24-NA-169 Service bulletin2024-10-16 · Electrical System
- This technical bulletin provides repair information to correct a customer concern of SuperCruise Dropping Out After Driving 30–60 Seconds and/or Service Driver Assist Message Illuminated with DTCs U1626, U3000, and/or B2BA1.
What B2BA1 means
Source: SAE J2012 / OBD-IIB2BA1 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 B2BA1 a known problem on GMC vehicles?
It is a documented one: NHTSA's files hold 22 manufacturer filings and 0 owner reports naming B2BA1 on 6 GMC model years (2023–2025). 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 B2BA1 appear on most?
2023 Yukon (9 documents), 2023 Sierra (4 documents), 2024 Hummer EV (3 documents).
Does B2BA1 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.