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View Full Version : GM.GearCom PID causing error report



bubba68ss
February 2nd, 2019, 07:29 PM
Trying to diagnose a 4l80e not upshifting. I am trying to log gm.gearcom (commanded gear) but whenever I select that PID (had to validate to make it active) and then try to connect I get a 'generating error' report ($31 I believe). I tried to connect multiple times after restarting, new cable, etc... finally connects ONLY when I disable that PID.

Desperately need this PID to figure out why I'm not shifting out of first ( I can command gear changes through DVT. VSS is dead on, TPS reads correct, shift table is normal, MAP reads normal)

bubba68ss
February 2nd, 2019, 07:31 PM
Since I tried doing this I have updated the V2 firmware. I have yet to try logging again since the truck is an hour away. I just want to come prepared when I make the drive.

joecar
February 6th, 2019, 09:28 AM
The pid is GM.GEAR


post your V2 config file.

bubba68ss
February 6th, 2019, 09:58 AM
Now is gm.gear the commanded gear OR the current gear? I believe I had the current gear PID working fine. I wanted to see if the PCM was saying ‘shift’ or not.

joecar
February 9th, 2019, 05:57 AM
GM.GEAR is the commanded gear.

The pids GM.GEARCOM and GM.GEARCURR are for Allison and not for 4L60E/4L80E.