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I have a 2011 GMC Sierra with the 5.3L LC9 engine. I noticed that oil temperature can be recorded but my understanding is that this is a calculated value based off of other parameters rather than an...

I'm working with a '57 Bel-Air with an LS1 drivetrain. VCM Editior did not automatically recognize the tune, presumably because of the VIN is funky (ends in _LS1_) but I was able to pull the tune...

Sounds good, thanks for the info guys. I just didn't want to accidentally brick it because it wasn't exactly correct. Now I can start working through the issues. I think it's throwing a few codes...

My father in law has recently purchased absolutely beautiful '57 Chevy Bel-Air which has been converted to an LS1/4L60E/Ford 9" drivetrain. I decided to hook up my scanner to it the other day and...

That's a great attitude that I wish more people had. I'm actually not very new to tuning in general, I'm just new to tuning this thing. Back a long time ago in what seems like another life I made...

Very interesting. May I just take a moment to say THANK YOU for actually answering the question at hand instead of saying "well have you done a search," "why would you want to do that," or "I don't...

I'm looking to do some minor changes to the shift points on my 2011 GMC Sierra 5.3L with the 6L80E transmission. Part throttle seems straightforward enough and WOT would appear to be but there are...

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I will attempt to answer your questions as best I can.

1. It's not a particularly high power inverter, 400w continuous, 800w peak.

2. Voltage readings are a bit of a guess but let me try to...

The thought crossed my mind but I can't. To me that's no better than just removing the bulb or turning off error reporting for a check engine code instead of correcting the problem.

A circuit...

Background Info: (TL/DR) at the bottom

I've got a little bit of a strange question and the answer may be that it's simply not possible, but it never hurts to ask. I have a 2011 GMC Sierra with...

I'm trying to run down a P0101 error. I don't really believe there is necessarily anything wrong with the MAF as nothing at all looks out of the ordinary in my data logs when the code sets.
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I did notice that TPS did go to 99.6%. I was actually looking to see how the TPS actually behaved relative to pedal position when I noticed it.

I noticed on a datalog that for wide open throttle the computer is only ever recognizing the pedal position at a maximum of 89% Is this normal behavior or is it something that can be re calibrated? ...

Just a guess but it sounds to me like maybe the truck has a tune in it already that has been protected, thus HP Tuners doesn't know what to do with it.

Thanks to the info, sent you a PM.

No takers really?

I have noticed that on a stock datalog the O2 voltages stay around 500 even the the commanded value should be 451. When I command them lower than 451 it seems to get to about...

For whatever it is worth I keep a close eye on transmission temps. I upgraded my cluster to one that has the trans temp gauge and the truck has the factory tow package which includes the...

A friend of mine has a 2008 Silverado for which he has recently purchased a handheld tuner for. It has several tunes, including an "economy" mode. I was curious exactly what this might do so I did...

Thanks for the info. I was thinking that drive by wire should have no need for an IAC, thus the reading might be correct but I just wanted to verify before I started chasing a non-existent problem.

I have a 2004 Silverado 5.3L which I am just starting to do some tuning on. I have noticed that at idle, or even with the key off, the TPS% reads much higher than I would expect:

Key off: 19.2%...

I have a 2004 Silverado 5.3L that I am trying to work with the fuel economy on. It looks like enabling the actual lean cruise is a no go per our friends at the EPA, so I have been reading a little...