I will try to walk you through this, as I am a satisfied PCM4Less customer. The real answers should be provided by alvin or "marshall" via pcm4less.com
I'm sure at this point you have name, address, vin, engine selections correct, I never put in a broadcast code because I sent them my PCM, gear ratio correct, etc (the first 3 pages of the order sheet) On page 3 make sure you correct for tire size difference (ex. im running 255/70/16) Shift firmness is your choice, firmness 3 is what I went with, it will chirp on full throttle 2nd gear shifts. It will put your head back. If you like that, then get it! Firmness 2 would be a logical choice to increase drivability and have a sporty feeling. Firmness 1 is just cleaner shifts from what i've been told, not much of a sporty feeling. Page 4 has your octane selection, I chose 93 since it's easy to find around here. A lot of people choose 91 since thats a more common "premium fuel" If gas prices are high enough for you, choose 87. On this 4.2L they can only advance timing so much, so unless you're trying to squeeze every HP out of the motor, the 87 would be fine. There have been times where someone else put 87 in my tank on a 93 tune, It really did not affect anything. I noticed some power loss at high RPM, but other than that no difference. I would recommend choosing the octane to what you think you will use most. On page 5 you have rev limiter (no reason to change this from stock) idle (factory idle is best for fuel efficiency, i guess if you didn't care about gas usage you could increase idle and it would warm up faster in the winter, I don't have that kind of spare cash). Then elevation (go here to find it from your home computer
What is my elevation?). Towing has some different changes they make, mostly if NOT towing at all they will remove
all torque managment. With some towing they may set torque management to decrease at 2500 rpm, or all the way up to 5k rpm. Basically I wish I said "no towing", but occasionally I do tow heavy things and am glad there is a little torque managment at lower RPM's. If you tow more than 10 times a year I would say the avg weight of what you tow in the box, if you tow less than 10 times a year I would leave the box at Zero or "No". Also- Dont worry about removing any codes, you want them all to be normal and work. Displacement on demand was only offered on the 5.3V8, and I would want that on since it helps MPG. On to Page 6 - Mass air flow is stock, If you have a CAI you should list what kind, there is an option for "other" if you care to describe your homebrew if you have one. I chose other and listed the ChromeIntakesCAI with a K&N filter. It is the same the K&N kit just without the heat shield. If you have no aftermarket air filter I would put "drop in" in the box (this means you have an aftermarket air filter designed to work with the factory air box and is the same size as OEM, just more free flowing) And actually purchase one, they do help if you buy a good one. Then you have catalytic converters, This is a tricky one since the common replacement for bad cats is the magnaflow one on rockauto. I don't think these count as "high flow" so I would put stock, or if you removed your catalytic converter I would put none. To my knowledge they don't make a bolt on high flow cat for our trucks so... onto catback. Catback is your exhaust from the catalytic converter back. If you have made modifications let them know. I believe they DO read your comments on the order sheet so feel free to tell them what you have, how you want it, and describe the results you want. They will do their best to interpret it, and provide the results you want. I can't speak for PCM4Less, but I would think if you ordered a tune, installed it, and didn't like something about it, they would be more than willing to adjust the tune for free. (obviously within a reasonable amount of time from the initial tune). Either way, it's only $50 for a re-tune so not that much would be lost. Just trust that PCM4Less will assure your happiness. I did and I am happy.
