Early 99 ECM Swap Results

[bennetbr]

I tow a 9k fifth wheel. That's why I went with the 60T. I haven't towed yet, so I can't comment on the performance increase over stock. Empty there's much more power than stock, so I assume it will work great towing.

Sorry to hear your cruise control light doesn't work. Strange how just a few months makes a difference with the early 99's.

Originally Posted by tinkerr

Hey Bennet,

I was snooping around the net looking for info on the pcm and got a list of interchangable pcms it lists your as having higher clutch pressure over a pmt1. after your tunes it won't matter anyway, just thought it was interesting side note. The issue with the cruise light makes me wonder if it's the truck wiring or the pmt model. Why did you go with the 60t tune, do you tow heavy? James recommended 60t for me also, but I don't tow anything heavy, Maybe 6k, leaning toward the 80t.

[2fastc]

Can anybody tell me if an 2wd ecm will work on a 4x4? I want to swap my early 99 for an 01 and found one for a 2wd just wanted to make sure it will work before i lay out the cash. thanks

[CarTotem]

I'm wondering the same thing as 2fastc. Will a 2000 2WD ECM work on an early 99 4x4? Both automatic trannys.

[Rich D]

Need to know the part #'s of both PCM's before you can answer that question.