Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B1015: VIN Information Error: Description
Body Control Module (BCM) uses the Vehicle Identification Number (VIN) to learn what Buick model the BCM is installed. When ignition is in on position, the PCM sends a signal along class 2 serial data line to BCM. The BCM will compare the VIN sent from the PCM with VIN digits 2 through 5 stored in BCM memory.
DTC B1015 will set when stored VIN digit No. 5 does not match PCM sent VIN.
When BCM stored VIN No. 5 and PCM VIN No. 5 match, DTC will clear. If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC B1015 will clear when scan tool is used to clear codes.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.