Would a seized air compresser stop a northstar engine from starting?

Yes, a seized air compressor could prevent a Northstar engine from starting if the compressor is directly connected to the engine's belt system. If the compressor is locked up, it can create excessive resistance, making it difficult or impossible for the engine to turn over. Additionally, if the engine's accessory drive is overloaded due to the seized compressor, it may trigger a fault in the vehicle's electrical system, further impeding the starting process.