* Blown fuse: Check your owner's manual to locate the fuel pump fuse and check its condition.
* Relay failure: The fuel pump is controlled by a relay. Locate and test the fuel pump relay.
* Bad fuel pump: The pump itself could have failed.
* Wiring issues: Damaged or corroded wiring can prevent the pump from receiving power.
* Fuel pump inertia switch: Some vehicles have an inertia switch that cuts power to the fuel pump in a collision. Check to see if yours has one and whether it's tripped. This switch is usually under the dashboard or in the engine compartment.
Before tackling any repairs, it's best to consult a repair manual specific to your 1986 Chevy S10 Blazer V6. This will provide diagrams and detailed instructions to help you diagnose the problem accurately.