No you do not. The oil pump is not in the oil pan.
It is behind the timing cover that is on the front of the engine. You will have to remove everything that is bolted onto the front of the engine. The oil pump slides over the front of the crankshaft.
The 2005 Chevrolet Silverado-2500HD has a V8 engine.
The 2005 Chevrolet Silverado-2500HD has a 6.0 L base engine size.
The 2005 Chevrolet Silverado-2500HD's engine produces 300 hp @ 4400 rpm.
The 2005 Chevrolet Silverado-2500HD's engine produces 360 ft-lbs. @ 4000 rpm.
The 2005 Chevrolet Silverado-2500HD has 16 valves.
The 2005 Chevrolet Silverado-2500HD has overhead valves (OHV).
The 2005 Chevrolet Silverado-2500HD is a gas-powered vehicle.
The 2005 Chevrolet Silverado-2500HD has a 5-speed manual.
The 2005 Chevrolet Silverado-2500HD's turning circle is 43.8 ft..
The 2005 Chevrolet Silverado-2500HD is 18 ft. 6.1 in. (222.1 in.) long.
The 2005 Chevrolet Silverado-2500HD runs on regular unleaded.
The height of the 2005 Chevrolet Silverado-2500HD is 6 ft. 4.2 in. (76.2 in.).