This could be many things. But check for a clogged exhaust first. Catalytic converters can clog and cause power losses under load. Also, check fuel pressure, and the condition of the air filter. Basics first, air, fuel and exhaust. Then delve into the more complex things such as compression loss, worn timing chains, and even overheating situations.
do you have TBI ?
9 to 13 PSI.
It is in the oil pan.
Yes. It was used in the truck line in 1996-2000.
Flatbed tow truck
Take it to a mechanic
Autozone or Ebay
230, it went to 255 in 1996 with the vortec
it cost 1500 dollars to replace my tranny at the local tranny shop
power or manual?
That depends on the gear ratio in the rear ends, not the engine. To make the truck have POWER with those big tires you need at least a 4.10 gear in the rear ends.
There is a sensor in the side of the radiator that is most likely defective.