ok put efans in today and changed pcm's with an 05 silverado that already had credits for it on hptuners since my version gets in this week. anyway... the fuel gauge shows ZERO. i just filled it up yesterday so its full. how do i fix this?????

 

is it actually reading zero or is it stuck? When I did my efan swap one of my gauges got stuck somehow. I had to tap the plastic glass for about a minute before it finally went back to normal.

 

really? i think its on zero b/c at first the fill up now light was on but that might have been on just for a second. i really dont wanna go to the stealership to have them fix it. there has to be some way i can like reset it or something

 

There are parmenters in the PCM you need to change,this is more than likely your problem,seen this many times

 

which ones are they

 

My suggestion would be to wait until you get your HPT and then activate the fans yourself rather than using a pcm that's of a different year and has different settings and could possibly f$%& up more than just your fuel gauge

 

thats what we tried to do but the guy i got the fans from was making his truck back to stock and needed my stock stuff and he sold his truck so we had to do it this way

 

yah i gotcha. I would just be careful cause even if you get the same pcm from a similar truck, settings in the tune are different so just be careful and make sure things aren't too far off. I would just not worry about the guage problem until you get HPT and write your stock pcm.

 

im gettin it all figured out. pm'ed wheatly b/c he said earlier i just have to change a few things. the 05 pcm did have a tune in it previously but we did modify it for my av. talked to Virgil, the one who tuned it and he said its just spark nock and said it should go away with driving and it has gone away a lot but theres still a small amount. thanks for yalls help guys!

 

Just because the PCM was previously tuned with HPTuners and credits where used to license it, doesn't mean you won't have to licensed with YOUR new HPTuners. The pcm is licenced to the cable it was tuned with. You will have to re-license it with you new HPTuners cable to be able to tune it. Will you be able to get to your stock PCM to download your original tune to start with? That's probable where your fuel gauge problem is. I wouldn't have swapped PCM if I where you.