gm engine serial number lookup gm 4 533087

Please remember that any of the 55'-59' V8's produced by Pontiac or GMC could have been easily dropped into your truck in the last 50 some years. I do not know if any early 60' '536387' blocks were used for late GMC 59' 336 engines. Http:/ / / gmc/ 5559mm/ 5559mm0i05.htmlĪnd your block casting number is not '528456' (the Pontiac block used for the 58' GMC 336 or '532000' (the Pontiac block used for the 59' GMC 336) you do not have a GMC 336 engine. My take is that if you can't find the engine serial number that starts with '336' as illustrated here: Http:/ / L1EarlyV8Pontiacs/ V8%20Engines/ index.html (Look at the 'GMC/Pontiac V8' section on this page).

Here is a short explanation by Bill Hanlon on the Safari site about the GMC 55'-59' V8's. Http:/ / L1EarlyV8Pontiacs/ IdentificationTags/ index.html I believe a 57' model year would indicate a 347 motor. Using info from the '1955-60 Pontiac Engine Component Interchange and Identification' pages bookmarked below, the number represents a serial number that would have been found on a tag inside the driver's door jamb and stamped on the front of the engine.Ĭ = South Gate, CA, place where car was assembled.ħ = 27 Series car, 122 in wheel base (all Chieftains, Superchiefs and Safaris)ġ4287 = serial number of car as it came off assembly line Second, I believe the 'C757H 14287' number on the front of your block supports the '347' car engine theory. This would mean that you may have a 57' 347 car engine. What you think is an '8' is really a '9'. Let me throw out a couple of theories, you do some research on some web pages I will suggest and any of your own, and then you decide.įirst, I believe your block casting number is 523293. No stamped number in that area could mean that you have a regular Pontiac engine instead of a GMC engine.

Gm engine serial number lookup gm 4 533087