Could be a bad water pump.
No - you do not need to have the truck running.
Possible broken/cracked fuel return line.
If your truck is dieseling or running on, it could be that the fuel is too rich. Try using a lower octane of fuel.
the oil pressure in the engine rises when the truck is warming up causing the light to show, if continues after the truck has been running, change oil and oil pump.
Sounds to me like you may have rotted fuel lines.
bad coil? check for spark. make sure your getting power to your coil from ignition.
By running out of it.
A running board is a narrow step under the side door of a truck. Running boards are used for easier entry into a truck, especially a truck with a high entrance. Running boards are also used as a fashion statement.
could be the fuel pump
No. You unplug the block heater BEFORE you start the truck.
It could be the U joints from the transfer case causing the problem.
if it won't start at all after running it could be vapor locked. try opening the gas cap for a minute and see if that works.
The truck needs a tune up.
The pump is only on when running.
Daytime running light module may be the problem
Technically it will not cause the truck to run rough. Depending on what year the truck is. If its a 2000 or higher then it might have to be secure. But If your truck is running rough, it's either going to be spark plugs and wires, cap or rotor, coil pack, or fuel filter. I have just had this problem with my 1990 Chevy truck. The coil pack was loose, but that wasn't causing the problem. It was because the coil pack was bad. If you are having these problems check the minor things first. Mostly something electrical will be causing this problem.
300 watts is not any volts. Watts are how much power is being used regardless of the voltage. For example you could have a 300 watt spot light in a truck running off the 12 volt system in the truck or you could have a 300 watt security light on your house running off of 120 volts.
Because in park it doesn't use much gas, but in drive it uses more and this could be causing detonations due to valve timing or sticking. It could also be a cracked manifold or damaged gasket. Both can cause loud running noises.
I had a problem with my 1999 silverado bacause of a faulty fuel pump it was causing my truck to cut off after running for a minute or two. After getting under the truck and listening to the fuel pump whine I was then able to determine that the pump was in need of replacement. The truck runs great now that I have replaced the pump. I didn't know what to do for my truck to get it running right so I replaced ignition coils, control modules, and even straight wired my ignition so the relay's wouldn't cause my truck not to crank properly.
depends on how big the bed of the truck is
If it is clear water it is probably just condensation from the air conditioner and nothing to worry about. Condensation forms on the a/c unit and hoses much like water forms on the outside of a glass of iced tea. If you haven't been running the a/c or if the water is not clear you should have it checked out.
Could be timing or carburetor running too rich/lean or could be cold blooded and needs time to warm the oil.