driver side, engine compartement
The amp is located under the center console.
in the gas tank.
Its located inside the valve core on the right rear tire. You must remove valve cap and use a good flashlight to see it on the sierra.
The EGR valve is located on the intake manifold,behind and to the passenger side of the throttle body.
The 2004 GMC Sierra-2500HD has 16 valves.
The 2004 GMC Sierra-1500 has 12 valves.
The 2004 GMC Sierra-1500 has a V6 engine.
The 2004 GMC Sierra-2500HD has a V8 engine.
It is inside the fuel tank .
The 2004 GMC Sierra-1500 is a gas-powered vehicle.
The 2004 GMC Sierra-1500 has overhead valves (OHV).
The 2004 GMC Sierra-2500HD is a gas-powered vehicle.