ECM on 3406E

If both ecms have the same pin count they will interchange. The earlier one should be a 40 pin. The 98 may be a 70 pin. If the pins are the same check out the specs on each engine. You may need to contact a dealer for guidance. But reflashing should not be to castly.

 

should be 40 pin for both.(square looking plugs) just flash the program and go.

 

Post photo of ECM to identify

 

by what I'm gathering you've got a 5ek and a 2ws. If my mind serves me correctly a 40 Pin and a 70 pin platform. They won't swap you won't know without looking but I could have sworn a 2ws or the rare 6ts I believe was a 70 pin ecm

 

I thought 2ws was 2000. maybe late 99. I don't think 2ws#'s were around in98. never seen a 6ts with 70 pin. 98 was 1lw or 6ts 40 pin. and the rare 1mm in 99.

 

I am pretty sure you have a 5ek and a 1ws , ECM wise they both have the same part number , but need to be programmed , they don't have the same low nox programation

 

For some reason I had it in my god forsaken head that it was a 99 year model motor. My mistake. 2000 would he a 2ws in truck years correct 99 in a motor year. Idk why the hell I got so confused long day yesterday

 

yer forgivin! LOL