Consult the manual that came with the truck. I don't know which motor you have, but that's the kind of stuff I learn before I buy a truck. 5
My 2000 Sierra with 5.3 liters V8 needs 6 1/2 quarts of oil
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The 2003 GMC Sierra-2500HD has 16 valves.
The 2003 GMC Sierra-1500 has 12 valves.
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5
16
The 2003 GMC Sierra-2500HD's engine produces 300 hp @ 4400 rpm.
The 2003 GMC Sierra-1500's engine produces 200 hp @ 4600 rpm.
The gas tank on the 2003 GMC Sierra-1500 holds 34 gal..
The gas tank on the 2003 GMC Sierra-2500HD holds 34 gal..