Grand National Chip Core

This ECU chip appears to be an OEM-style PROM labeled ABYU, intended for the 1986–1987 Turbo Buick platform. The calibration could not be verified, and no known reference data exists for this code. Recommended for collectors, bench testing, or experimental ECU setups where the tune is not critical.

🔴 Red Dot – Condition Unverified / Tune Unknown

🔧 Compatibility:
• 1986–1987 Buick Grand National / Turbo T / T-Type / GNX
• Fits OEM ECU (factory Turbo Buick computer)

📦 Includes: Chip only (as pictured)

Condition Notes:
• Label present but not traceable to any known calibration
• Pins appear straight and undamaged
• Tune parameters unverified; not recommended for street use without retuning

Why You Want It:
Ideal for collectors or experienced Turbo Buick builders looking for rare or obscure PROM codes to archive, test, or dissect. Could serve as a spare core for reprogramming or chip socket experimentation.

⚠️ Disclaimer:
This chip’s tune is unverified and may not provide proper drivability or safe operation. T6P has not tested this unit. All items are sold as-is, with no returns or exchanges. Buyer is responsible for verifying compatibility with their ECU and intended application.