Hi I live in PA and own a 1992 4X4 Silverado with a 305 engine, I am wandering if anyone ever came across a problem like I have. I can't get my truck over 150 degrees, I changed thermostats 3 times,ran it without the fan,changed the heater hose quick connect,took the shroud off,blocked the front of the radiator,change the return heater hose to the water pump that was going to the radiator and last put a washer with a small opening in the top hose. Nothing worked!!! I am not stupid when it comes to cars, I've built 5 race cars and help out with my daughter in laws drag car. I also use a radiator thermometer and never trust the dash gauge. Any suggestion would help, the engine isn't getting hot enough to evaporate the moisture out of the block---hence my dip-stick is very rusty not to mention the fuel injection not getting to it's full working capacity.