I know it's a common mistake, but 1955-1959 Chevrolet trucks were Task Force models, like 1941-47 were AK Series / Art Deco models and 1947-55 Advance Design ones. Apache, Spartan and Viking were the names used only for 1958-1959 Task Force trucks (see here for Vikings and here for Spartans) and only for 1960-1961 C/K ones.
So 1955-1957 Chevrolet light- and medium-duty trucks (seems not to be any Spartan model in IMCDb) souldn't be called "Chevrolet Apache" or "Chevrolet Viking". They were just 3600 (or 3100?) to 10800 Task Force models.

I think it could be better to rename all 1955-1959 trucks Chevrolet Task Force, with an Apache/Viking/Spartan complement for the 1958-59 models.
Same thing for the 1960-1961 1st gen. C/K-Series trucks : 1960-61 Chevrolet C/K-Series Apache/Viking/Spartan.
So all 1955-59 Task Force trucks would be together, and same thing for the 1960-66 C/K-Series too
______________

Same general idea: Chevrolet stopped using the Apache (& Co) name with the 1961 MY. So these 3 cars have a wrong ID:
http://www.imcdb.org/vehicle_50016-Chevrolet-Apache-1962.html
http://www.imcdb.org/vehicle_50246-Chevrolet-Apache-1962.html
http://www.imcdb.org/vehicle_316819-Chevrolet-Apache-C-10-1963.html

Is that a really well known name?
I think that currently on the site we often named these simply "Pickup", with the number (3100/3600/...) as chassis-code.
I am not sure what's the best way to name these, but the current one can be changed of course, especially for the years that are wrong

Well, first of all, it was the official name given by Chevrolet for its 1955-59 trucks, as you can see for '55, '56, '57, '58 and '59 (even if I suspect the 1959 picture writing to be a later modification)

If you search for "Chevrolet Task Force", you'll find what is called "Chevrolet Apache" in IMCDb:
- Flickr;
- Duckduckgo;
- Bing;
- Ggle.
All links give the 1955-1959 model years for these trucks.

And when searching for "1955-1959 Chevrolet pickup trucks", it gives you easily sites saying "Task Force" in the first line. Ok, some times, you have to go to the third paragraph to see this name

So yes, I think the "Task Force" name meets the "well known name" criterion
You know my point of view: I prefer accurate names to vague ones. So I think we had better to gather all 1955-59 trucks with the same name and "3100 & Co" as complement.
As we both agree : we must find another name for 1955-57 Chevrolet pickups, as "Apache", "Viking" and "Spartan" names didn't exist at that time. So if we give them their real "Task Force" name, why not give it to other TF trucks?

And for 1960-66 models, they all belong (1960-61 Apache included) to the 1st generation C/K-Series, which starts only with the 1967 models in IMCDb (except one single lost 1966 model since this afternoon ).

OK.
I'll do these changes when I've a few time.
So to summary:
replacing pickup/3xxx/Apache by Task Force as model name for 55-59
and C/K since 1960
putting the 3xxx as chassis code
and the Apache/Spartan/Viking as extra info 58-59 only
right?

That's it. As no 1955 "first series" 3100 (i.e. Advance Design models from the first part of the year) seems to exist in IMCDb, there will not be a mess with that MY. All 1955 Chevrolet pickup trucks here are (or seem to be) TF ones.

And Apache/Viking/Spartan can also be put as extra info for (only) 1960-1961 C/K-Series models too.
(The fact is there is only 38 "Apache" for '60-'61 Chevrolet trucks in IMCDb, no Viking nor Spartan)

Thanks!

Done with the "Apache"
Remains now all the "Pickup"
What about Panel Vans btw?

Thanks. Same thing for the panel vans, I think:
- 1955-57 Task Force Panel vans; 1958-59 Task Force Apache Panel vans;
- 1960-61 C/K-Series Apache Panel vans; 1962-66 C/K-Series Panel vans.
It seems Chevrolet called them "panels" only, but panel vans sounds good too.

OK I'll update them too then. I wasn't sure that these names applied to the panel variants.
edit: well it is not so clear on that add actually. Shouldn't it be Suburban Panel ?

Btw, I've split the topic to keep this Chevrolet discussion separated from the other general thread, as it will be useful for future reference.

Chevrolet Suburbans were officially called Carryall Suburban / Carry-all Suburban / Suburban carryalls from 1934 to 1966⁽¹⁾, but panels were... panels, always panels
A more clear add: a 1956 one.


I'll try to make a web page about the differences between model years of Task Force trucks and their Blue Chip GMC counterparts. So I'll put the link here when ready.
And same think about the 1947-55 Chevrolet and GMC Advance-Design trucks.

By the way, I noticed that the "Apache" name was still present in the title of 1955-1959 Task Force trucks pages (but not in the "clickable" part), in IMCDb. Is this a bug?
As said before, I think "Apache" can (should?) be given as (clickable?) complement name for 1958-59 Task Force and 1960-61 C/K models. It was not just a trim level, but a kind of "sub-name" for the light-duty trucks line. But it's true Chevrolet didn't help with this "semi-bi-generational" name
(More or less the same trouble with the "Chevrolet Cheyenne", which was only a trim level for various C/K trucks in USA, but which is believed to be a full vehicle by some...)
___________
(1): it seems that with the arrival of the 2nd generation of C/K, 1967 and following years adds only show "Suburban". With some "reminiscences" sometimes?
For the record, Chevrolet managed to register the "Suburban" name as a trademark, but only in 1988.

1957 line in a kind of hip-hop style

The Apache is in extra info, hence why it is not in the clickable part of the model name.
But indeed I could include it in the model name directly.
By the way, only 1958-1961 should have Apache in their name, right? I forgot to remove it from the older ones.

According to http://www.flickr.com/photos/autohistorian/8270522690 we should also change the Sedan Delivery then? And actually all these old Suburban should also be listed under Task Force?
Maybe that's why originally we didn't include that Task Force name, as most of these vehicles are known and referred with their sub-model name.

Yes, only for 1958-1959 TF and 1960-61 C/K models.


Indeed, but I think it could be a retouch, or the publicist of this catalog did certainly abuse of some kind of illicit stuff
Others catalogs don't say that... One again. An a last one.
The Sedan Delivery was made from the cars, not from the trucks, so it's more than a "poetic licence" when they're called part of the Task Force family


From the same catalog as the last linked (1956 one), you can see:
- Chevrolet Task Force Panel 3100 (small) model and 3800 (bigger) model, but:
- Chevrolet Suburban (Carryall), without the "Task Force" name.
When you seek a little in the Internet, you will often find Advance-Design Suburban, Task Force Suburban, x generation C/K Suburban references... As the Subs are made from the light-duty trucks, it's an easy way to recognize them. And they were utilitarian vehicles ("Carryall"), which may explain why they appeared in the trucks catalogs. They were less austere vans, but the luxury SUV they are now did not exist at that time

I really think the TF name wasn't used in IMCDb because most of people thought (and still think) that 1955-59 trucks are only Apache or Viking. And I suspect that Spartan are believed to be the medium- and heavy-duty for 1960-61 trucks line only: cf. the trucks in the Spartan part of the next message.
As already said, it's a common mistake that is still done, and lot of comments in IMCDb pages about these trucks reinforces this idea. There wouldn't have been "1955-57 Apache" trucks, otherwise

(Next episode: Viking and Spartan trucks.)

(Antoine, the answers to your questions are in the previous message)

About Task Force // C/K Viking and Spartan trucks:
* Task Force models:
1958 and 1959 models where
- Apache when 3100 to 3800^(*) // 31 to 38 // ½-ton to 1-ton light-duty trucks (just as reminder);
- Viking when 4000 to 6000 // 40 to 60 // 1.5- to 2-ton medium-duty trucks;
- Spartan when 8000 to 10000 // 80 to 100 // 2.5- to 3-ton heavy-duty trucks.
(*): actually, it seems 1958-59 Task Force Apache/Viking/Spartan trucks should only have 31 to 100 id numbers.

IMHO, the 19 IMCDb models should be divided in two parts.
- 1955 to 1957 as "Task Force" only (with the 4xxx number when present, even if I'm not sure of the accuracy of these ones), as there was no particular name for the medium- and heavy-duty trucks for these model years. The three of them have a wrong date, but I'll propose a correction in the comments for each ;
- 1958 and 1959 models as "Task Force Viking". Wrong date for some of them too, so page comment as well.

Maybe this renaming could be an occasion to think about having the same kind of id numbers for all Task Force Vikings (and Apaches?): some are id 4100, other 40, and so on. As the 1958-59 fender emblems show only 2 digits numbers, is it really pertinent to have the 4 digits ids?

* 1960 and 1961 C/K models:
- C/K-10 to C/K-40 were "Apache" light-duty trucks;
- C-50 and C-60 were "Viking" medium-duty trucks;
- "Spartan" was the name for C-70 and above heavy-duty models.

There is only 4 60-61 Spartans in IMCDb, and 2 of them are Vikings, in fact. So my suggestions are:
- 1961 Chevrolet C-50 Viking;
- 1961 Chevrolet C-60 Viking (cannot be a 1962 model, with that front fascia...);
- 1961 Chevrolet L-80 Spartan;
- 1961 Chevrolet L-80 Spartan.
L-80 Spartan because they are L-Series (contraction of the former LCF/Low-Cab-Forward name of 1955-59) L-80 Spartans, not C-80... To see the difference: 1960 C-80, with low fenders and "thin" hood vs. 1960 L-80, with higher fenders and "thicker" hood.

* Apache/Viking/Spartan "side effects" in IMCDb:
- This "1964 Chevrolet L-Series Viking" is just an "L-Series", the windshield and the fender emblem being clearly the ones of a 1964 model.
- This "1961 Chevrolet 1-Ton" is said to be a C-30/1-ton. So it should be identified as a 1961 Chevrolet C-30 Apache.
_______________
Sources:
- Wikipedia on Task Force and 1st generation C/K Series;
- TrucksPlanet.com;
- The Hollister Road Company;
- A lot of pictures seen via Flickr, Wikimedia Commons, Duckduckgo, Bing, etc.

Thanks for the details.
To your question, the 4-digit codes are the official full "internal" model numbers it seems, I guess it is good to use these as chassis-code.
On newer ones I think sometimes they were also using only 2-digit instead of the full model composed C or K followed by the 2-digit.
We could include it additional in the model name, e.g. Chevrolet Task Force Apache 40 [4100], but it does not seem useful to add that to what we already mention with the chassis code.
Anyway in the next version of the site these kind of changes will be more easy to do so I think that for the moment we can do follow that direction (4-digit chassis codes, Task Force or C/K model, with additional name in model for some years)

As noted by Atom, Chevrolet literature always note Task-Force with an hyphen. I should have pay attention to it, as it is the same think with the 1947-55 Advance-Design name...
(In my defence, most of the time it's just a point, so it's hard to see it as an hyphen.)

Pardonpatapélatête, Patron !

ok I'll change that

You're Flash! Just said, already done!!!
Thanks.

The only apache with pic without year, to be checked:
http://www.imcdb.org/vehicle.php?id=533684

and this one:
http://www.imcdb.org/vehicle.php?id=408952
isn't it a Suburban?

I moved "Apache" in the model name of the 58-62 Task-Force/C/K-Series as said previously.
I'll continue cleaning the various pickups & 3100s in the next days.

Yergl! Hard to see something.
All what follow is more based on guesses than on real observations. If indeed a 3600 (so light-duty truck), and if you and any other well-meaning people accept to see in this blurry picture the Chevrolet hood emblem in the "normal way hat"⁽¹⁾, 4 headlights and the big bar with the additional lights in the grill, then it seems to look like a 1958 Task Force Apache model:


But I'm not sure to admit it again under torture



Some Panels were transformed, but I think police forces didn't "play" that way with 1 or 2 years old vehicles
So I think it's a Suburban too. And 1960 seems to be the accurate my, with what looks to be the fender emblem on the exact place the 1960 one was.



Thanks.
I leave some comments when crossing "lost" vehicles too, but I think you "met" most of them
________________

(1): pure personal way to remember the difference between 1958 and 1959 models: "normal hat" vs. "overturned cut sombrero". If anyone has an academic way to say it, please share it