GM Part #19210071 - How do I get one?

[Chet Donnelly]

So let me get this straight dealership has car for over 6 months and says they cant get a pcm but they are available through rockauto?

Sounds like great dealership!.............

LOL...they are not available through Rock Auto...they inadvertently had them on the site, but when I called they said not in stock and probably will never have stock again.

From what I can tell over a few days of searching...there is one guy in Spicer MN and one guy in Westchester NY that has bought up all the supply of these things. Guy in Spicer seems to be a junk yard, guy in NY seems to be a performance shop.

 

[CMNTMXR57]

It's not available at Rock Auto either.

Also, the one on RA, if it were available, was a refurb. And sometimes GM can get sketchy on refurbed electronics. Particularly if the vehicle is in warranty, which I doubt this is, but still...

It sounds like if it truly is a PCM, that something internal is fried, broken or cracked and no amount of programming will fix it.

 

[Chet Donnelly]

Also isnt there a a few GM tuners that could setup a computer to be plug and play?

I mean remote tuning support is incredible now a days IMO.

The ECM has some sort of issue though, so it likely isn't as simple as being able to just tune.

 

[Chet Donnelly]

It's not available at Rock Auto either.

Also, the one on RA, if it were available, was a refurb. And sometimes GM can get sketchy on refurbed electronics. Particularly if the vehicle is in warranty, which I doubt this is, but still...

It sounds like if it truly is a PCM, that something internal is fried, broken or cracked and no amount of programming will fix it.

Definitely no warranty...my old man is the original owner from 2005 and hasn't bought any kind of extended warranty on it. Its actually been mostly a solid car up until this.

Apparently this part is housed inside the wheel well and ends up getting damaged from moisture.

 

[EmersonHart13]

Time to swap in a different motor. I hear those new motors work pretty good....

 

[Chet Donnelly]

Time to swap in a different motor. I hear those new motors work pretty good....

I did tell him to do a Coyote swap and be done with this pile of garbage!

 

[EmersonHart13]

That might be a one off!

 

[Chet Donnelly]

Not even sure if a DOHC engine would fit in that thing!

 

[1quick]

Now I’m not sure this will work for you but back in 07 I bought an 06 supercharged Grand Prix and wanted to tune it but no one had cracked the pcm yet, I ended up swapping out the pcm for an 04 to test my theory that it would work and it did, so I bought an 05 used pcm out of an identical car and had a company do a custom tune on it worked fine and I ran the car like that for many years

 

[CMNTMXR57]

BAN! Never replace an LS motor with that!

Yes, steps for removal are remove wheel well stuff...

 

[b4black]

I worry when a mechanic says it needs a new ECM. They rarely go bad, and when the do, it's obvious. No check engine light, scan tool won't talk to it, etc.

Bad ECM = I can't figure out what's wrong, so lets change the most expensive part.

 

[CMNTMXR57]

Scan tool not talking to it could just be a bad DLC port. That's actually more common than you think.

 

[Chet Donnelly]

I worry when a mechanic says it needs a new ECM. They rarely go bad, and when the do, it's obvious. No check engine light, scan tool won't talk to it, etc.

Bad ECM = I can't figure out what's wrong, so lets change the most expensive part.

I get this for sure. But reading on Corvette forum this afternoon...there seems to be a good amount of people with this exact issue (car shuts off within 40 minutes of driving) and they all seem to say it was fixed with a new ECM.

 

[CMNTMXR57]

If water is getting in there, past the connectors, it could be shorting something out internally which would make sense given it's location.

 

[EmersonHart13]

If water is getting in there, past the connectors, it could be shorting something out internally which would make sense given it's location.

My hot tub is having this issue.

 

[CMNTMXR57]

TMI...

 

[TommyGloves]

Just did some quick digging...here are all of the part numbers that should interchange for 2005. Try searching on some of these to see if you can find a unicorn ECU.

12578554, 12596771, 12597191, 12597883, 19210071

These guys might be an option...expensive though...
https://www.ebay.com/itm/2005-GM-5-...8554-Programmed-to-your-VIN-ECM-/183321949585

 

[boostedguy05]

Would a Silverado ecm work?