Reverse Calibration Look Up

Brian Instructor Parma, Ohio Posted   Latest   Edited  
Unsolved
Programming
2006 GMC C5500 Topkick C5C042 8.1L (G)
Hesitation
Lack of Power

Hello all, I am familiar with checking cal ids on GM SPS, is there a way reverse look up what application a calibration is for? This vehicle has multiple drive-ability issues, story has it converted back to gasoline from lpg. current pcm cal id shows like older single calibration pcms cal id …, Thanks for any input in advance.

1GDJ5C1G76F900186

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Allan Instructor
Winnipeg, Manitoba
Allan Default
   

Brian I tried running that CAL ID on SPS and it comes up as invalid. … Can you verify the number? When I run the VIN number - 1GDJ5C1G76F900186- that CAL ID is not listed. I tried running …, it is a valid CAL ID, just not for this truck. As Benjamin said this truck was a Schwann fleet truck and came LPG from factory. So the calibrations on SPS will be for LPG. You could try…

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Brian Instructor
Parma, Ohio
Brian Default
 

Yes came up invalid for me as well.

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Benjamin Diagnostician
Murfreesboro, Tennessee
Benjamin Default
 

According to the VIN# this truck was originally a gas only engine. If it had lpg it would have had to been an add on. You can look up calibration info here... tis2web​.​service​.​gm​.​com/tis2web

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Benjamin Diagnostician
Murfreesboro, Tennessee
Benjamin Default
   

It also appears that Schwan’s had GM write a program to convert their trucks to LPG. If you try to program this truck with SPS it appears it will write the LPG engine calibration back to the PCM. This would either require a call to GM’s help desk to see if they could alter the programming software and return it to a gas only vehicle or would require some tuning software to change the vehicle…

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Brian Instructor
Parma, Ohio
Brian Default
   

Thanks Benjamin, I did the gm / tis look up before posting. I will try contacting GM tomorrow.

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Rudy Technician
Montebello, California
Rudy Default
 

When you look up Cal-ids there is a short description of what the CAL is for in the same area.

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Brian Instructor
Parma, Ohio
Brian Default
 

yes the cal ids on gm site are for LPG

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Benjamin Diagnostician
Murfreesboro, Tennessee
Benjamin Default
 

Here is what you are dealing with... bpnews​.​com/index​.​php/publ…

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Brian Instructor
Parma, Ohio
Brian Default
 

Yeah it is former schwan truck. This has been gas since previous owner. Has been running for years on gas ( not well according to the people I have been able to speak with.) tough diag problem, multiple "hacks" I am just working though many symptoms that come and go, looking to verify proper pcm cal ids for 8.1 gas / allison trans

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