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593 views 1 reply 2 participants last post by  klhansen 
#1 ·
Quick question, I change my PCM from the 2000 to a early 99 and the truck is throwing a code ! light came on and it looks like the code is MIS. just trying to sell the truck at this point what problem do you run into with changing the PCM for me 2000 to a 99??
 
#2 ·
2000 PCM's aren't compatible with early '99 trucks. The difference is that the early '99 had a separate BARO sensor, while on the later '99 trucks, the BARO sensor was incorporated into the PCM. If it's an early '99 you're trying to sell, it will need an early '99 PCM to run right.
 
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