Before tuning your truck

[15silverado]

I just got my Diablo intune tuner in today. I thought I seen somewhere on here before that you should pull a fuse for the onstar or something before you tune it then put the fuse back in after its tuned. Thanks for any help in advance

[bigsapper]

Never heard of such a thing and I can't imagine why it would be necessary. I have one for my 2014 Silverado and there are no such instructions in the manual.

[JcMont]

I've never had to do that

[15silverado]

I could be wrong but I think it was in a post about Blackbear and Diablo tunes

[JRDUCKS]

The only issue with onstar is if you have a obd reader in 24/7. They send you monthly diagnostic reports and if it's plugged in it thinks there is an issue or that you have an aftermarket device plugged in.

[15silverado]

Oh ok. Thanks for the help guys

[JcMont]

My onstar is active with the diablo and dont have that issue..

[JRDUCKS]

My onstar is active with the diablo and dont have that issue..

Do you have a controller plugged into it 24/7 or did you just uoload your tune and pull it off?

[JcMont]

Upload and unplug, dont see the point in leaving it on.

[JRDUCKS]

Upload and unplug, dont see the point in leaving it on.

Yep let me clarify, Onstar only picks up the unit and thinks there's an issue or aftermarket device if it's left on. I know some tuners have displays reading engine data from the OBD port under the dash.

[15silverado]

Ok thanks for the help