Problem with my 2001 Chevy Silverado 1500.
5.3 L V8. New radiator 1 year ago.

Question = My truck started leaking radiator fluid...not from the radiator, but further back towards the
back of the engine. Can you diagnose this problem for me?

As with any vehicle, a coolant / antifreeze leak needs to looked at carefully to diagnose  where the
leak is coming from. Many things can cause a coolant leak.
From basic problems like a leaking hose, loose clamp, water pump, to more serious like  intake
manifold gaskets, or a freeze plug.  
Have a mechanic do a pressure test on the system to find the source of the leak.

Problem with my 2005 Chevy Silverado LS.
5.3 liter Vortec V8
Check Engine light.
GM Computer codes = EVAP Sensor
GM tech = JK
question = Where is the EVAP sensor on a 2005 Chevy Silverado? How do I reset or change it out?
If you are referring to the EVAP Fuel Tank Pressure Sensor, this is located on top of the fuel tank, on
the fuel pump module. The tank will either need to be removed, or lowered to gain access to it. It has 1
electrical connector, and snaps into the fuel pump module assembly.
See picture below. This is from the top of the fuel tank.
Fuel tank pressure sensor picture location. This is with the tank removed, looking down at the top of the fuel pump module.

1993 chevy 1500 truck.
Question: the heater hose under the dash is leaking into the floorboard . is this a hard fix?
There should not be any coolant hose under the dash. It almost sounds like somebody added the
hose there for some reason. Maybe you are seeing a leak from the heater core. If that is the problem,
then this is a big job. The dash needs to come out of the truck.
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Silverado Coolant Leak- EVAP Pressure Sensor Location