Upgrading early 99 ECM to later model year

[c6crouch]

I was just wondering what the advantages of having a late 99 or 00 ECM have over the early 99 unit. I have read that the cruise ligh will work, but it also said something about running better as well. What all years will work with my early 99, just late 99 or all 99-03 units. I have the opportunity to get one cheap so would just like to if it would be worth the dealership price to flash the unit.

thanks

[CSIPSD]

PMT (2001) is the best IMHO. It has the best day to day shifting strategies...

NVK (2000) is also good, but I dont like the lock up on it.

[c6crouch]

i forgot to mention that it is a manual. but you are saying that any ecm from 99-03 will work, or do i have to get one that was on a manual truck.

[CSIPSD]

Originally Posted by c6crouch

i forgot to mention that it is a manual. but you are saying that any ecm from 99-03 will work, or do i have to get one that was on a manual truck.

For a E 99 swap you need to find a late 99-2001 PCM out of a manual truck... They changed the PCM programing in 2002 with the new dash and other crap...

E99-2001 are interchangable for the most part, stick with manual for manual, auto for auto...

[c6crouch]

what are all the actual advantages of doing this swap, i really have no idea. Also, it seams like the factory would have used the same unit for both manual and automatic, but maybe I am wrong. I assume I have to get the unit flashed for my truck, am I rite, and if so, why would you not be able to use a unit from an automatic. I ask because the one that i can get is coming from a truck with an automatic.

thanks you for your response

[CSIPSD]

Originally Posted by c6crouch

what are all the actual advantages of doing this swap, i really have no idea. Also, it seams like the factory would have used the same unit for both manual and automatic, but maybe I am wrong. I assume I have to get the unit flashed for my truck, am I rite, and if so, why would you not be able to use a unit from an automatic. I ask because the one that i can get is coming from a truck with an automatic.

thanks you for your response

the auto will work in a manual, but it will set a SES light and have lots of codes.

There are differant PCM familys, its not as simple as a reflash.

A 2002 and 2003 PCM is differant and set up for differant controls, it WILL NOT work properly.

A Auto PCM will NOT work properly on a manual truck. Just telling you how it is... Let me know when you get that auto PCM and it doesnt work, I might be interested.

[c6crouch]

In that case, its probably not worth it for me. But for future reference, what numbers should i look for, and what are the advantages and disadvantages of switching from a e99 to a later model year.

Thank

[Dirk]

For a stick... you'll want a DAC3.


good luck finding one. I have one somewhere, but I can't find it..