Story · Featured · Timeline · Model Years · Specials · Z06 · Grand Sport · L88 · Engines · Racing · Buying & Market · ...
The Full List, 1953–2027 Quick Nav: Overview · How It Grew · The Lineup Today · Model Lines · The Hubs · C1 · C2 · C3 · C4 · ...
The GMC 503 was a 502.7 cu-in gas inline-six making 455 lb-ft at 1,000 rpm — until diesel economics made every mile harder to ...
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