Question about 1995 GMC Sierra C1500

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I have a 1991 GMC truck with a 5.7 liter. The engine will crank but it will not start. It will run for a few seconds but then stalls out even with enough fuel in the tank. I have replaced the plugs, wires and fuel filter. The only time the motor starts is when I put fuel into the carb but it only runs for a few seconds.

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Can the truck idle if you keep your foot slightly pressing on the gas pedal while cranking? If so you need to clean or replace your idle air control valve.

ignition control module is next to check.

Posted on Oct 11, 2010

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Check fuel pressure maybe bad fuel pump.

Posted on Oct 11, 2010

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