fuel pressure regulator on 2002 Chevrolet Silverado 2500 HD

the truck won't start when it sits overnite in the cold, once it starts it is good until i park overnite again it starts if i heat the motor up with a hair dryer under the pan for an hour or so , i was told that it was the fuel pressure regulator, don't know where it is to fix it.

The fuel pressure regulator on your 2002 Chevrolet Silverado is located on the fuel rail on the right side of the engine. I would not suspect a fuel pressure regulator to cause the no start condition you are having. I would recommend a more through diagnoses before replacing any parts.
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Had same kind of problem. If you don't remember when the last time the fuel filter had been replaced and have not done so yet, do so. There's a very big difference of fuel flow between new filter and clogged filter.
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