6.0 ECM differences

[20THOR]

What are the differences between the different models? I think mine is going south and was looking to replace. more specifically I have found a Harley ecm and was wondering what was different from a Lariat ecm.
my truck is an early04 lariat 4x4
harley ecm is 04 and 4x4

[HeavyAssault]

It will need to be programmed for your VIN. Tire size will be changed as well. There is a base PCM code on the sticker something like DDU-462 (????) that needs to be the same. FYI an auto tranny truck will be a totally different PCM than a stick shift truck.

[Dave]

The harley and lariat ecms should interchange fine for that year. Tire size will need to be changed in it like heavy assault said though

[HeavyAssault]

It will still need the VIN programmed correct??

[Dave]

Originally Posted by HeavyAssault

It will still need the VIN programmed correct??

It will run. But it will show a vin mismatch code

[20THOR]

thanks for the info, the tire size should not be a problem to change. my other question is about the mileage is that stored in the ecm or in the dash? and i take it only the dealer can change vin and mileage?

[Dave]

The mileage is in the dash so you're good there. Only the dealer can change the VIN

[20THOR]

ok cool, thanks