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Used GMC Engines



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From the start, GMC actually owned just two engine designs, a V8 and a straight-6. However GMC vehicles were fitted with numerous other engines from its parent, GM. The 228 is the first wholly owned GMC engine to be used, it replaced the Pontiac 223 in 1953. Then GMC launched the 236 which had an OHV/pushrod mechanism. This 3.9 L engine was developed in 1939 and was used until 1955. In the same year GMC manufactured a 4.1 L version of the 248 but it exhibited more similarity to the 236. The 256 was another OHV/pushrod engine but it differed from the 236 and 248. The production of the 256 was discontinued after just two years. The 270 was the final GMC only straight-6 OHV/pushrod engine. It ran in production from 1941 to 1962. The 302 GMC inline-6 was launched in 1952 and was produced until 1969; it featured a 4” bore and a 4” stroke. It was initially designed for the M211 and the M135. However, it went on to be used in 2.5 ton military trucks with HydraMatic transmission, the engine was sealed for submersion use and featured an electric fuel pump. GMC started the manufacturing of civilian unsealed 302 engines from 1952. These came with a mechanical fuel pump and also used a conventional oil pan.

If your beloved GMC car or truck is wasting away in the garage and in need of a new engine you're in luck. SWEngines has a range of GMC engines which can be rebuilt to any specification or requirement. Most dealers who sell used engines do nothing to improve the condition of the engines they sell, they simply scour the junkyards and finally sell the parts back to you after a bit of casual cleaning. SWEngines makes sure that all of the parts in the engine including the short blocks, small blocks, long blocks and big blocks meet the original GMC specifications. Many vendors use broken and refashioned parts on their used engines and end up compromising the safety of the passengers and other vehicles on the road. SWEngines stock a massive inventory of car, truck, bus, and pickup engines and most are ready for shipping. When investing in a GMC used engine, keep in mind that you may have to use the existing valve covers, intake manifold, timing cover and oil pan from your original engine. The GMC cylinder blocks, crankshafts and connecting rods are thoroughly cleaned before being fixed to the engine.