Will computer on 3400 motor Chevy Impala interchange a 3800 Impala?
No, a computer from a 3400 Chevy Impala will not directly interchange with a 3800 Chevy Impala. These engines have different sensors, wiring harnesses, and overall control strategies. The PCM (Powertrain Control Module), which is what most people refer to as the "computer," is specifically programmed for the engine it's paired with. Trying to use the wrong one will result in a non-functional or severely malfunctioning engine.