Engine Serial Number

[FetchMeAPepsi]

Hey everybody! Mine's a D and she's from 1962. I looked at that page and in the notes section it says C models were 1960 and 61 in big trucks. (note 2).

If thats wrong we should get it changed!

[bigblockv6]

Originally Posted by FetchMeAPepsi

Hey everybody! Mine's a D and she's from 1962. I looked at that page and in the notes section it says C models were 1960 and 61 in big trucks. (note 2).

If thats wrong we should get it changed!

That's definitely wrong!

[FetchMeAPepsi]

Originally Posted by bigblockv6

That's definitely wrong!

I guess someone needs to find out what the real dates were and pm jeannie so she can fix it.

[6066gmcguy]

The info on the site states "Used in 1960-61 in series 4000 trucks" that means this was the one of two Engine use in these trucks as note #2 in on both the 305B & 305C engines. Don't read anything into the notes that is not there. also note 4 "The 305C was the same as a 305B except for manifold and carburetor which provide increase horsepower".

Notes were posted to the page as I found the info, no were in the notes does it say the 305C was dropped from the line up.

[FetchMeAPepsi]

Originally Posted by 6066gmcguy

The info on the site states "Used in 1960-61 in series 4000 trucks" that means this was the one of two Engine use in these trucks as note #2 in on both the 305B & 305C engines. Don't read anything into the notes that is not there. also note 4 "The 305C was the same as a 305B except for manifold and carburetor which provide increase horsepower".

Notes were posted to the page as I found the info, no were in the notes does it say the 305C was dropped from the line up.

Ahh ok. It reads different when you're looking at it. I understood "This motor was used only in 1960 and 61 in big trucks, that's all." And since mine is 1962 with a D it made sense to my simple brain!

[6066gmcguy]

FetchMeAPepsi, your truck is a light truck, a 1962 so the engine it should have is the 305D, which replaced the 305A in the engine line and the 305A was dropped after the 1961 model year.

Here is what you need to know about 305 V6 Engines,

305A 1960-1961 light duty engine.
305B 1960-1961 Med Duty truck engine
305C 1960-1974 Med & Heavy duty engine.
305D 1962 Light Duty engine. replaced 305A
305E 1963-1974 Light & Med duty engine. Replaced 305D.

Light duty engine had 3 piston rings, heavy duty had 4, but some light duty engine have been found to have 4 rings as well.

Light duty trucks 1000-3500 Most used the 305, with the 351 as an option.
Med Duty trucks, 4000-6000 you could find 305, 351 or 401 egnines in these trucks.
Heavy Duty trucks 6500-9500, most of these had the 401 or 478. 7000 series had the 702 V12 1960-1965.

All GMC Images & material contained on the WebSite were taken from publicly available sources provided by GMC to promote their Trucks from 1959 to 1974.

[6066gmcguy]

FetchMeAPepsi, your truck is a light truck, a 1962 so the engine it should have is the 305D, which replaced the 305A in the engine line and the 305A was dropped after the 1961 model year.

Here is what you need to know about 305 V6 Engines,

305A 1960-1961 light duty engine.
305B 1960-1961 Med Duty truck engine
305C 1960-1974 Med & Heavy duty engine.
305D 1962 Light Duty engine. replaced 305A
305E 1963-1974 Light & Med duty engine. Replaced 305D.

Light duty engine had 3 piston rings, heavy duty had 4, but some light duty engine have been found to have 4 rings as well.

Light duty trucks 1000-3500 Most used the 305, with the 351 as an option.
Med Duty trucks, 4000-6000 you could find 305, 351 or 401 egnines in these trucks.
Heavy Duty trucks 6500-9500, most of these had the 401 or 478. 7000 series had the 702 V12 1960-1965.

All GMC Images & material contained on the WebSite were taken from publicly available sources provided by GMC to promote their Trucks from 1959 to 1974.

[bigblockv6]

The 305D came into play in 1961, you could get the 305A or the 305D that year. By 62 it was just the 305D

[FetchMeAPepsi]

Originally Posted by 6066gmcguy

FetchMeAPepsi, your truck is a light truck, a 1962 so the engine it should have is the 305D, which replaced the 305A in the engine line and the 305A was dropped after the 1961 model year.

Here is what you need to know about 305 V6 Engines,

305A 1960-1961 light duty engine.
305B 1960-1961 Med Duty truck engine
305C 1960-1974 Med & Heavy duty engine.
305D 1962 Light Duty engine. replaced 305A
305E 1963-1974 Light & Med duty engine. Replaced 305D.

Light duty engine had 3 piston rings, heavy duty had 4, but some light duty engine have been found to have 4 rings as well.

Light duty trucks 1000-3500 Most used the 305, with the 351 as an option.
Med Duty trucks, 4000-6000 you could find 305, 351 or 401 egnines in these trucks.
Heavy Duty trucks 6500-9500, most of these had the 401 or 478. 7000 series had the 702 V12 1960-1965.

All GMC Images & material contained on the WebSite were taken from publicly available sources provided by GMC to promote their Trucks from 1959 to 1974.

Now that's a buncha info! I could listen to you guys talk about engines all day. Makes me even more proud to be part of the club


And now I really wanna get back to work on Cecilia... Only one more fence panel to go, then erect my shed, and BOOM - back to work on my baby!

[Jeannie]

I believe this is now fixed in the notes section of the Engine Data page. I will further clarify the page on the site renewal in the coming months as time allows.