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6.0 Liter OHV 16-Valve Vortec V8
6.6 Liter OHV 32-Valve Duramax Turbo-Diesel V8
2003 GMC Sierra 2500HD Engines
2003 Sierra 2500HD 6.0 Liter OHV 16-Valve Vortec V8 Engines
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2003 Sierra 2500HD 6.6 Liter OHV 32-Valve Duramax Turbo-Diesel V8 Engines
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