GMC V8 engine

Template:More references Template:Infobox automobile engine GMC has both shared engine designs and architectures with other General Motors divisions as well as having a history of developing and using its own unique engines and powertrains such as its line of straight-6 and V8 engines.

GMC enginesEdit

GMC's own V8 was the Template:Convert unit, which was essentially a 478 V6 with two cylinders added. It shared the Template:Convert bore and stroke and used a single camshaft. It was manufactured in gasoline and diesel versions, and was the largest-displacement production gasoline V8 ever made for highway trucks. The GMC 637 V8 was produced from 1965 to 1973.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Non-GMC enginesEdit

PontiacEdit

Prior to developing its own engines, smaller GMC trucks used the Pontiac V8 engine. They used the Pontiac Template:Convert engine for 1955 and Template:Convert engine in 1956, but advertised the engines as the "GMC 288" and "GMC 316". They used Pontiac's Template:Convert in 1957. For 1958, GMC reduced the bore of Pontiac's Template:Convert to Template:Convert, resulting in a displacement of Template:Convert. (In Canada, however, GMC used the Chevrolet small-block engine rather than the Pontiac.) For 1959, as the Pontiac engine's stroke was lengthened to Template:Convert, a further bore reduction to Template:Convert was done to keep the displacement at Template:Convert.

OldsmobileEdit

Starting in 1955, for the larger trucks, the Oldsmobile Rocket V8 was available. In 1955 and 1956, it was Template:Convert. Power listed for 1956 was 210 hp @ 4200 rpm; torque was 305 lb-ft @ 2400 rpm. For the 1957 through 1959 model years, it was upped in bore and stroke and called the 370. Power was listed as 232 hp @ 4200 rpm and torque as 355 lb-ft @ 2600 rpm.<ref>A History of GMC Trucks, James K Wagner</ref>

Chevrolet Small-BlockEdit

From 1955 through 2003, GMC shared Chevrolet's small-block V8. This came in 265, 283, 305, 327, 350, and 400 cu in (4.3, 4.6, 5.0, 5.3, 5.7, and 6.6 L) sizes.

Chevrolet Big-BlockEdit

GMC also shared Chevrolet's big-block V8 from 1968 through 2009. The company used the 366, 396, 402, 427, 454, and 496 (6.0, 6.5, 6.6, 7.0, 7.4, and 8.1 L) versions.

GM LS-based enginesEdit

Beginning in 1999, GMC began offering GM's LS-based "small-block" V8 engine in various models. Through the years, engines have been offered in 4.8, 5.3, 6.0, 6.2, and 6.6-liter displacements.<ref>LS based GM small-block engine</ref>

Duramax enginesEdit

Beginning in 2001, GMC offered the same turbocharged diesel Duramax V8 engines as were available in similar Chevrolet trucks. The engine family was co-developed by GM Powertrain and Isuzu, and has gone through numerous iterations through the years. Duramax engines are paired with a heavy-duty automatic transmission from GM's Allison division. <ref>Duramax V8 engine</ref>

ReferencesEdit