i work at autozone, and on the performance isle there is an inline fuel pressure guage. i know that fords have steel braided fuel lines does the blazer have these as well or are they rubber, or rubber with a special lining and if i can put it in what is the reading supposed to be? i haven't really looked around at the fuel lines on my truck and i want to know what the reading currently is, etc.

 

The flexible lines are nylon (or some derivative of nylon). They are more than adequate to handle the pressure.

On the SCFI motor (96+), there is a fuel pressure test port on the fuel supply line on top of the engine. It is located just behind the throttle body. There will be a small plastic cap that you need to remove, then attach the gauge. No inline connector needed.