Question about ecm's

[907stroker]

Ok so in my early 99 I have the dpc-401 ECM
I want to find the dpc-421 but its in an automatic transmission excursion
Would it work in my truck? Or could I have the ECM out of an auto flashed to work in my standard?

 

[CSIPSD]

"Work" as in start the truck...

Yes.

Glow plugs will not work, the SES light will be on constantly...

What are you trying to do by swapping PCM's?

 

[907stroker]

I want to get gear head tunes but they keep telling me they can't tune for the 401 like I have.

 

[CSIPSD]

I have no idea why he cant or choses not to tune an E-99 PCM.

All you need is a 2000-2001 Manual PCM.

Forget all the 401-421 crap.

Your looking for a PCM out of a 2000-2001 truck.

 

[907stroker]

Does it matter about the transmission? Can the PCM be flashed for a standard

 

[CSIPSD]

I'm not sure on the flashing. Ask Bill at Powerhungry performace...

 

[co04cobra]

The "best" pcm for the manual trucks is a DAC3. Any late 99 or 00 trucks are the dpc 421s.

01 trucks got a dpc 461. This is all for manual trucks.

However, all that said I dont know why he wont just tune your PCM. It shouldnt be an issue. IMO.

Auto pcms can be flashed or changed with a chip wrote for a manual truck. It is the simplest to just get a manual pcm.

 

[907stroker]

I don't know why he can't either it's very frustrating and he is loosing business now. I just don't know much about the pcm's to know where to find them