Gas gauge backwards after Flash

[DaleSlides]

2003 Silverado, 4x4, LM7. Original OS 12579405, written OS is 12587603 (both 1mb).

Only change I made to the replacement file was disabling torque management. Truck runs great, however I noticed my Fuel gauge reads backwards (Empty reads full, Full reads empty). There isn't an XDF for my original OS, which is why I moved to the new OS (The file written to the truck is from an 04 LM7 4x4).

There is a Fuel gauge table in the new OS that sends PWM values to what I am assuming is the stepper motor in the cluster, and I would assume reversing the values here would fix my problem.. however I wanted some input before making the move.

[2xls1]

Looking at 03 and 04 Silverado files with HP Tuners there are 2 tables in the Fuel System section that are flipped between the 2 year calibrations. They are labeled Primary Volume and Primary Volume Gauge. Here is the data from the 03 Calibration that you can copy into the 2 tables in the 04 File that should fix the gauge.

[DaleSlides]

Thanks for the input buddy, I was able to look at the XLS file you attached and see the values, however I am unable to see the same table on my setup since I'm using LS droid and Tunerpro.

I tried reversing the values in the table I mentioned in the first post, however the file failed to write (twice), and I was forced to recover the PCM using my previous Bin.

I'll keep digging into this, hopefully someone has resolved it.

[2xls1]

Those tables are probably not defined in the XDF you are using. Post the bin file from your 03 and the bin file from the 04 you are using and I can insert the data into the 04 file and save it and put it back up here for you to use. I have lots of editing tools. That way if there is a difference in fuel tank sizes between the 2 it will have the correct data for your 03 truck. Many times there can be slight differences in fuel tank sizes in the trucks and I can copy every table relevant to that into the 04 file. If you don't have a bin for the 03 then post the VIN and I can figure it out.

[DaleSlides]

Those tables are probably not defined in the XDF you are using. Post the bin file from your 03 and the bin file from the 04 you are using and I can insert the data into the 04 file and save it and put it back up here for you to use. I have lots of editing tools. That way if there is a difference in fuel tank sizes between the 2 it will have the correct data for your 03 truck. Many times there can be slight differences in fuel tank sizes in the trucks and I can copy every table relevant to that into the 04 file. If you don't have a bin for the 03 then post the VIN and I can figure it out.

The Bin starting with 161937 is the factory file read from my PCM, the other is the 04 file with torque management deleted.

Thanks for your help man

[2xls1]

The only torque management setting I see changed is Max Tq changed to 639. That does not disable torque management. If you want me to I can disable it correctly if you want.

[2xls1]

Here is the 04 file with all Torque Management Disabled, the 03 Fuel Gauge data, and I changed the Injector data to what is correct for a 03. 03s use a return fuel system with a regulator on the rail and 04s use a dead head system with no return and the regulator in the tank. There is a difference in the Fuel Injector tables between the two different systems. Let me know if this fixes the gauge issue.

[DaleSlides]

Here is the 04 file with all Torque Management Disabled, the 03 Fuel Gauge data, and I changed the Injector data to what is correct for a 03. 03s use a return fuel system with a regulator on the rail and 04s use a dead head system with no return and the regulator in the tank. There is a difference in the Fuel Injector tables between the two different systems. Let me know if this fixes the gauge issue.

Thanks a ton man, evidently I need to do a lot more reading/studying on the LS XDFs/OSs.. they're layout and such. I will be flashing it in just a minute, I'll let you know how it goes. I'd like to do some reading on the tools you're using, do you mind pointing me in the right direction? Thanks again!

[DaleSlides]

That was it, gas gauge is reading properly now and the truck drives great. You're a life saver, I really appreciate it.

[2xls1]

I'd like to do some reading on the tools you're using, do you mind pointing me in the right direction? Thanks again!

They are commercial tools. HP Tuners and Tunercat OBD2 with lots of licenses bought.

While I think it's great that people are trying to develop free tuning solutions what I see is a lot of people running the wrong OS for their vehicles due to lack of XDF files and not knowing what is wrong with doing that. For example thinking any blue/green OS is fine to use in any vehicle that came with a blue/green box. That is not always the case.

[Bmurph2000]

Im having this exact issue and was wondering if you'd possibly be able to correct the injector data to an 03 with the return, and also the fuel gauge data to what it needs to be in order to work with a 2003 truck.Im just getting started with tunerpro and dont know my way around it yet, so your help would be greatly appreciated. The bin im using is below

[2xls1]

Read the original PCM in the 03 and post it here so I can see what other differences there might be.

[trlrider]

For example thinking any blue/green OS is fine to use in any vehicle that came with a blue/green box. That is not always the case.

Agreed! Recently cloned a pcm in a '05 Workhorse P42 with a 4.8. The A/C was not working prior to the cloning, so I did not think about it.
Oddly since the replacement pcm fixed a half dozen other issues the owner was having, he asked if we could fix the a/c!
My boss started the process thinking it was something like a low freon, bad pressure switch etc.! I got freed up from the other project I had and started digging and found the a/c compressor clutch relay was not getting a signal from the pcm.
Found out my boss had probed it and shot 12 volts where there should have been a ground signal, and promptly burned something up in the replacement pcm.
Anyway, found out in the research that the service number I originally used did not have the output for the a/c compressor clutch.
Went to the house, pulled out another spare that documentation showed did have the signal, and cloned it.
Put it in and replaced the fuse my boss fried and the a/c compressor started working.
Oddly, the 1st replacement pcm came out of a 2005 Suburban. Thus I do not understand why that service number did not have the compressor clutch signal at that pin!
Anyway, yes not all blue/greens are created equal.

[2xls1]

Agreed! Recently cloned a pcm in a '05 Workhorse P42 with a 4.8. The A/C was not working prior to the cloning, so I did not think about it.
Oddly since the replacement pcm fixed a half dozen other issues the owner was having, he asked if we could fix the a/c!
My boss started the process thinking it was something like a low freon, bad pressure switch etc.! I got freed up from the other project I had and started digging and found the a/c compressor clutch relay was not getting a signal from the pcm.
Found out my boss had probed it and shot 12 volts where there should have been a ground signal, and promptly burned something up in the replacement pcm.
Anyway, found out in the research that the service number I originally used did not have the output for the a/c compressor clutch.
Went to the house, pulled out another spare that documentation showed did have the signal, and cloned it.
Put it in and replaced the fuse my boss fried and the a/c compressor started working.
Oddly, the 1st replacement pcm came out of a 2005 Suburban. Thus I do not understand why that service number did not have the compressor clutch signal at that pin!
Anyway, yes not all blue/greens are created equal.

You are talking about hardware. I'm talking about using the 04 OS in vehicles that use a blue/green box that are not MY 04. It's the inability to see what that other MY OS is using vs what the 04 OS is using because of lack of XDFs.

[Bmurph2000]

thanks for the help. The original bin from the 03 is below. Im also having trouble disabling torque management, not sure if you could help with that or not. Id like to keep torque management on for the shifts but I cant get it to do brake stands for the life of me and it also feels sluggish off the line like its cutting power, just all around making it no fun. Tia

[2xls1]

What tire size is on the 03? XXX-XX-XX not height.

[Bmurph2000]

245-60-18 is the tire size.

[2xls1]

Your 03 bin shows the vehicle is a 03 Yukon 4x4 6.0L with a 4L60 transmission. The 04 bin you are using is a 04 Silverado 4x4 6.0L with a 4L80 transmission. You have the 04 bin labeled as a 4x2 but the VIN in it shows it to be a 4x4. What transmission is in the vehicle and is the Yukon a XL? These are some of the problems when you try and use a file not from the vehicle. Especially a different year and vehicle type.

[Bmurph2000]

Yes the vehicle is a 2003 Yukon Denali non xl that had awd and i converted it to 2wd with a 4l80e. The bin im using is one i got off the forum and is the closest ive been able to find that works.

[2xls1]

Here is your 04 bin file with just the fuel gauge fix and the 03 injector data. I thought I would at least get that to you. I am working on another file with a lot of other things that should be fixed for you to try. I've just been kind of busy so it might be another day or to before I finish with it. I won't post it here since the mods kind of frown on posting highly modified bins so if you will either post here or PM me an email address I'll send it to you when I'm done.

[Bmurph2000]

No rush at all man, im just glad you're actually taking the time to try and help sort me out. You can email me at bmurphy21717@gmail.com.... Ill load this bin up and let you know how it works tomorrow, your help is much appreciated!

[Bmurph2000]

Figured I'd let you know that the bin you fixed for me is working great so far and the gas gauge reads correctly again, also seems like it runs better. Your help is greatly appreciated as it seems you know what you're doing more than i do.

[Caleb]

Here is your 04 bin file with just the fuel gauge fix and the 03 injector data. I thought I would at least get that to you. I am working on another file with a lot of other things that should be fixed for you to try. I've just been kind of busy so it might be another day or to before I finish with it. I won't post it here since the mods kind of frown on posting highly modified bins so if you will either post here or PM me an email address I'll send it to you when I'm done.

I'm also in this same boat. Truck was a CNG 2004 LQ4 and I converted it back to gas off 2003 parts, including fuel rail and lines. I think the file you shared will work for me as well but mine is a 4x4 2500HD. Is there any way you could modify to work for my set up? Everything on the truck is 2004 except for Fuel tank/Pump/Injector/fuel rail. That would be amazing if possible. Thank you so much!

[yoheer]

i have 2 bins from avalanches
similar gage problems after OS swap
The first car is 12579405

the second car is 12585950
there is a problem with DTC p0315 in the second car after OS swapping
it does not store any problems about misfire. Even if you disconnect any spark plug wire/coil

Can anybody help with correct os swapping?