Help finding partial vin on engine block - The 1947 - Present Chevrolet & GMC Truck Message Board Network

s10mk · 06-02-2018, 10:17 AM

Hi everyone.
I'm trying to find out if my engine is original or numbers matching to my truck. Its a 1972 c20 Cheyenne with a 350. My engine block doesn't appear to have a partial vin stamped on the passenger side front of the block. My truck was built in canada, is it possible that the Canadians stamped the partial vin somewhere else on the engine block?

Coley · 06-02-2018, 10:34 AM

These trucks did not come with the VIN stamped on the block so 'numbers matching' like the cars was never included....and that didn't start until sometime in the mid 70's for GM on the trucks.
(.......the cars are a different story)
What you will see on stamped on that engine is a code that defines when and where the motor was built as well as what size of engine and what type of vehicle it was destined for.
(ie: day and month built, plant location, series of truck..10, 20, pickup, van, etc and also whether it was an automatic or standard)

From there you can pretty much estimate if that is the original engine.

Coley

Bigdav160 · 06-02-2018, 10:54 AM

TRJ is correct broadcast code for a '72 C20 with automatic transmission

**Getter-Done** · 06-02-2018, 11:02 AM

Your code is
K= Catherines Ontario
05= the month of May
01= the day (the 1st day)
TRJ= 1972 year -350 cid-175hp-4 bbl- Conv.-Cab -A/T

Hope that helps you.

s10mk · 06-02-2018, 11:30 AM

Quote:

Originally Posted by Getter-Done

Your code is
K= Catherines Ontario
05= the month of May
01= the day (the 1st day)
TRJ= 1972 year -350 cid-175hp-4 bbl- Conv.-Cab -A/T

Hope that helps you.

It does help! Thank you very much

bruceman1968 · 06-02-2018, 01:05 PM

Do you have the protect o plate for your truck?

s10mk · 06-02-2018, 08:32 PM

Quote:

Originally Posted by bruceman1968

Do you have the protect o plate for your truck?

I'm sorry, what's a protectoplate?

bruceman1968 · 06-02-2018, 08:53 PM

It's a metal plate about 3x2, that was attached to your owner protection plan booklet in the glovebox. Your VIN is embossed on it as well as your engine, trans and rear end numbers.

s10mk · 06-02-2018, 09:13 PM

Quote:

Originally Posted by bruceman1968

It's a metal plate about 3x2, that was attached to your owner protection plan booklet in the glovebox. Your VIN is embossed on it as well as your engine, trans and rear end numbers.

How about that! I do still have that plate, and the engine numbers match what is on my engine block. Thank you!

bruceman1968 · 06-02-2018, 09:19 PM

Awesome, that's as close as you can get to numbers matching with our trucks. Still with the engine ID number match, it isn't reasonable to assume anything other than original engine. That is your original engine. You can also match up your tranny and rear end.

06-02-2018, 10:17 AM	#1
s10mk Registered User Join Date: Jul 2017 Location: herminie, pa Posts: 305	Help finding partial vin on engine block Hi everyone. I'm trying to find out if my engine is original or numbers matching to my truck. Its a 1972 c20 Cheyenne with a 350. My engine block doesn't appear to have a partial vin stamped on the passenger side front of the block. My truck was built in canada, is it possible that the Canadians stamped the partial vin somewhere else on the engine block? Attached Images __________________ 2012 GMC 2500hd/ 6.0 1972 Chevrolet c20 350/350 1986 Chevrolet Monte Carlo SS/ 6.0 lsx

06-02-2018, 10:34 AM	#2
Coley Registered User Join Date: Oct 2011 Location: Victoria, B.C Posts: 3,794	Re: Help finding partial vin on engine block These trucks did not come with the VIN stamped on the block so 'numbers matching' like the cars was never included....and that didn't start until sometime in the mid 70's for GM on the trucks. (.......the cars are a different story) What you will see on stamped on that engine is a code that defines when and where the motor was built as well as what size of engine and what type of vehicle it was destined for. (ie: day and month built, plant location, series of truck..10, 20, pickup, van, etc and also whether it was an automatic or standard) From there you can pretty much estimate if that is the original engine. Coley __________________ ....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 Last edited by Coley; 06-02-2018 at 10:40 AM.

06-02-2018, 10:54 AM	#3
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: Help finding partial vin on engine block TRJ is correct broadcast code for a '72 C20 with automatic transmission __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

06-02-2018, 11:02 AM	#4
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 7,726	Re: Help finding partial vin on engine block Your code is K= Catherines Ontario 05= the month of May 01= the day (the 1st day) TRJ= 1972 year -350 cid-175hp-4 bbl- Conv.-Cab -A/T Hope that helps you.

06-02-2018, 01:05 PM	#6
bruceman1968 Registered User Join Date: Oct 2009 Location: Tampa Bay Posts: 1,549	Re: Help finding partial vin on engine block Do you have the protect o plate for your truck? __________________ CHEVY/GMC VIN DECODERS

06-02-2018, 08:53 PM	#8
bruceman1968 Registered User Join Date: Oct 2009 Location: Tampa Bay Posts: 1,549	Re: Help finding partial vin on engine block It's a metal plate about 3x2, that was attached to your owner protection plan booklet in the glovebox. Your VIN is embossed on it as well as your engine, trans and rear end numbers. __________________ CHEVY/GMC VIN DECODERS

06-02-2018, 09:19 PM	#10
bruceman1968 Registered User Join Date: Oct 2009 Location: Tampa Bay Posts: 1,549	Re: Help finding partial vin on engine block Awesome, that's as close as you can get to numbers matching with our trucks. Still with the engine ID number match, it isn't reasonable to assume anything other than original engine. That is your original engine. You can also match up your tranny and rear end. __________________ CHEVY/GMC VIN DECODERS



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