The Eng 1 fuse on a 2001 Chevy Express van can blow due to several reasons, including a short circuit in the wiring, a malfunctioning component in the engine management system, or an overload caused by faulty accessories. Additionally, issues with sensors, relays, or the Engine Control Module (ECM) can also contribute to the fuse blowing. It's important to diagnose the specific cause to prevent repeated failures and ensure proper functioning of the vehicle.
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