If you plan on sending in the PCM, you wouldn't be able to drive the truck in the meantime. However, we do turn them around very fast, usually the same day or the very next day, so depending on what kind of shipping you choose and where you are located, you're not looking at much downtime. Once you get your PCM back you simply plug and play! It's not hard at all to get to the PCM, in fact if you want to email me at
sales@pcmofnc.com I'll be glad to send you the instruction pamphlet to check out.
The tune makes a really great difference in these trucks, and you don't have to be going wide open at 5k rpm's to feel it. We make a lot of changes in the engine and transmission to help it feel a lot lighter on its feet all around. The I5 is a great motor but definitely could use a bit of help in the H3, and that's where we come in!