It is on the left side of the water pump were the radiator hose hooks to it.
You will see 2 bolts on the thermostst housing remove them after you drain the coolant and have removed the hose.
MAKE SURE THE ENGINE IS COLD. where is the thermostat located in a 2005 siverado 4.8 V8
It does not have a thermostat sensor. There is no need for one....
The 2005 Chevrolet Silverado-2500HD has a V8 engine.
The 2005 Chevrolet Silverado-1500 has a V6 engine.
Just follow the bottom radiator hose to where it hooks to the engine, Remove the housing that the hose clamps to and that will be where the thermostat is.
The 2005 Chevrolet Silverado-2500HD has a 6.0 L base engine size.
The 2005 Chevrolet Silverado-1500 has a 4.3 L base engine size.
The 2005 Chevrolet Silverado-2500HD's engine produces 300 hp @ 4400 rpm.
It is on the intake manifold near the thermostat housing.
The 2005 Chevrolet Silverado-2500HD's engine produces 360 ft-lbs. @ 4000 rpm.
The 2005 Chevrolet Silverado-1500's engine produces 195 hp @ 4600 rpm.
The 2005 Chevrolet Silverado-1500's engine produces 260 ft-lbs. @ 2800 rpm.
Do it yourself engine transmission flush and filter change on 2005 Chevy silverado 5.3?"