Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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Joined: Jan 2008
Posts: 29
bigedpa Offline OP
Grease Monkey
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Grease Monkey
Joined: Jan 2008
Posts: 29
i have a 41 1/2 ton see "Admirals truck" post. engine #HAA9xxxxx. i believed that a truck motor should have an AK stamp and also thought that it wasn't until the 50's that the build plant went to a letter code. however, other sources said that this could be the original motor. 57 parts catalog states 41 motor # AA1001-AA1,163,720 which fits my info. it also states that military trucks may have had a 3rd letter added "H"??? found this info @ http://clubs.hemmings.com/clubsites/chevytalk/GMhistory/1941to1942motors.html
any help solving this is greatly appreciated

Last edited by bigedpa; 01/17/08 12:45 AM.
Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station


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1941 is the first year that Chevrolet used the letters before the number for engines.
The 1941 passenger car engines were AA or AC. The confusion can be found due to the fact that the coupe pick-up and sedan delivery was listed in with the truck engines numbers and because they were really a passenger car they also used th AA and AC letters.
The 1/2 ton trucks were AE and AD, the 3/4 ton AAN and AAF, the 1 ton and 1 1/2 ton were AN and AF.Teh cab over engine was a AJ. If the optional 235 engine was installed in a 1 1/2 ton chassis the engine letters would be AG or AL.
The engine with the HAA is a 1950 216 engine. There are variuos ways to determine if it is a 1950 engine. One would be the casting number (6 or 7 numerals) on the right side. The other is the 1950 engine has a roound circle with a zero in the center on the right side of the block-between the fuel pump and distributor. There are other items also. The 1950 engine numbers ranged from 1001 -1320152.

As far as it being an Admirals truck-thats a bunch of Cr@p...An Admiral would have had a sedan and would not have bounced around in a 1941 Chevrolet pick-up truck. Would have had a driver and he would have sat in the back seat. There are more scammers passing off vehicles as being something special so they can hope to get a higher price for them. Also a military vehicle sure would not have had extra trim bolted to the fenders as they bought only the cheapest and most plain vehicles. Also would have an ID plate riveted on to the dash.

Last edited by Chev Nut; 01/17/08 03:43 PM.

Gene Schneider
Joined: Jun 2003
Posts: 437
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Joined: Jun 2003
Posts: 437
Agree with Gene on the admiral's cars. I was stationed at fleet Hq at Pearl Harbor back in the early '50s. The CinChief was driven around in a black '48 Buick Roadmaster sedan. Other lesser admirals there were driven around in lesser black Buicks. When I checked out a pickup from the motor pool, it was the cheapest 3 window '52 navy gray Chevrolet pickup. I have a similar truck now..


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