Years ago, when the How-To was published on the Nation, the recommended Valve was part number 214-2147. The connector on the valve was oval and matched the existing 355 harness. GM discontinued the 214-2147 valve and replaced it with 214-2324. Now, if you order a 214-2147, you will automatically be given a 214-2324. The 214-2324 Valve has a square shaped connector and requires a jumper harness to mate it to the 355 harness. There is an optional Valve available, part number 214-2149, that still has the oval shaped connector and will be plug and play.
Newer 355s, starting with either the 2010 or 2011 model, came from the factory with Valves having the square shaped connector
You're quoting non-GM aftermarket numbers.
The Hummer valve is without the hose. If you buy the correct GM part it has the hose on it for the truck, which is nice but costs 5-10X more than the valve without the hose. I'm sure you know you can then transfer the valve on to the hose (or hose on to the valve).
If you go back to when this first presented itself as a problem, you had to be creative and someone found the Hummer valve to be the same but on the hummer you reused the hose, must have clamped on somehow. Anyways, if you can dig up THAT part, like I did, found a NOS one on eBay, you also have the old connector so don't need the adapter. Sorry if I can't describe worth a hoot.
I guess I go to these lengths because I'd rather have the Delco part and not pay for an adapter. I paid around $15 for the GM part which I didn't need an adapter for.
If I have to do this again I'll probably look for the correct Colorado part so I can avoid transfering the hose again, getting pretty beat up on the valve end due to the transfering 3 times.
I hate to sound like I know it all but again I have had to do this THREE times to my truck.