Hi Mike,

I recently installed long tube headers and an off road Y without CAT's. Can you let me know what need to be done to get a tune with the rear 02's deleted (I have them plugged in but just zipped tied out of the way and not in the exhaust). This is the same truck from this original post.

I ...

I can confirm as well. Issue is resolved. I appreciate it!!!

Outstanding! Thanks Mike. I will get this loaded tonight or tomorrow at the latest and reply with results.

Unfortunately I am still going into v4 mode. Here is the tune that was loaded. Please let me know next steps. I appreciate the help!

PCM_677878678668_pcm_677878678668_afm_modified.grg

It shows modified but that is just because I went in and confirmed AFM was disabled before loading. No ...

Thanks Mikel! I appreciate the support, I'll get it loaded and report back with details.

Loaded

Backup

I loaded the CROM then installed the modified 87 tune (DOD\AFM disabled). Unfortunately I'm still going into v4 mode. Please let me know if I can provide anything to help get this sorted out. I won't be able to do any uploads or get details from the tool until tonight sometime.

Thanks,
Kevin Nolle

Thanks for the quick response! I will do this after work and reply with details.

Hi,

I have a 2017 Silverado 1500 2wd with the 5.3 and 6L80 transmission. When I disable AFM\DOD the truck is still switching in v4 mode. I have tried modifying the stock tune to disable this and modifying the 87 tune (the tune I would like to use). With both of these I am still going into v4 mode ...