GMC Straight-6 engine
From Wikipedia, the free encyclopedia
GMC as a marque really only "owned" two engine designs, this straight-6 and a V8. The division "borrowed" many engines from other GM divisions, as noted below.
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[edit] Non-GMC engines
[edit] 207
In 1935 and 1936, GMC used Chevrolet's 207.
[edit] 230
From 1937 through 1950, GMC used Oldsmobile's 230.
[edit] 223
In 1938, GMC used Pontiac's 223.
[edit] 235
GMC used the 235 in³ (3.9 L) Chevrolet Straight-6 engine as their base truck powerplant in the 1950s.
[edit] 261
The Chevrolet 235 was bored out to 3.75 in (95.2 mm) to displace 261 in³ (4.3 L). This engine was offered as a step up from the 235 starting in 1954. It was replaced by the GMC V6 engine in 1960.
[edit] 292
From 1963 through 1978, GMC had its own distinctive version of Chevrolet's straight-6, the 292.
[edit] GMC engines
[edit] 228
GMC replaced the Pontiac 223 with their own 228 in³ (3.7 L) 228 in 1939. This side-valve engine was produced through 1953.
[edit] 236
GMC also developed an OHV/pushrod engine in 1939. The 236 in³ (3.9 L) 236 was the first, lasting through 1955.
[edit] 248
Those same years (1939-1955), GMC produced a 248 in³ (4.1 L) engine, the 248, which was similar to the 236.
[edit] 256
The 256 in³ (4.2 L) 256 was different from the 236 and 248. It was also an OHV/pushrod engine, and was built for just two years, 1940 and 1941.
[edit] 270
The last GMC-only straight-6 was the 270 in³ (4.4 L) 270. It was produced from 1941 through 1962 and was an OHV/pushrod engine.
[edit] 302
The "other" last GMC-only straight-6 was the 302 in³ (4.4 L) 270. It was produced from the early 50s through 1962? was an OHV/pushrod engine. It was originally designed for the GMC military 2 1/2 ton trucks (M135 and M211).
