12587811 PE Issue

[ScarabEpic22]

Same OS number in that last log? Or different OS?

I think its time to try another OS, seems like you've done the research.

[SkinnyPedal]

Its the same OS. I've tuned a few with the same OS and never had this issue. I may send him to the dealer for a full reflash. Worst come to worst I'll try a new OS and or new PCM.

Thanks for all the input!! It is appreciated. If anyone has run into this as well let me know. I will keep everyone updated with what I find.

[ScarabEpic22]

Interesting, have you tried full flashing it for kicks? I dont know what other year OSs interchange, could you try an 05 OS?

[SkinnyPedal]

I have tried a full flash, with the stock OS and a download from tune file depot. I'll check with a friend that works for GM and see if there is an upgrade to the OS. If there isn't ill try another PCM or even a previous year PCM.

[SkinnyPedal]

So I thought I would update this thread. I finally got this fixed and working.

Here is a few things we did that did not work. We tried reflashing with same OS. We had the dealer flash from a tech 2 and it ended up being the same OS, still did not work.

I then used a 2005 OS and bingo, power enrichment but now I had a TAC module issue. I called a friend that had a 2005 TAC module and we swapped it for the 2006. Now everything is working great and the truck runs awsome.

Short version we used a 2005 OS and a 2005 TAC module.

[joecar]

Thanks for posting back.

[SkinnyPedal]

Have anoher 7811 at my shop and no PE.

Does anyone know if there is a min torque enable/reqest setting or anything that has to be met like the TPS and MAP? I wonder is there is something else in this OS that has to be changed to be able and activte PE.