doropallo

G218 ground issues. It's been discussed here too or just Google it. Another thought is the knock sensors, they set the timing. They caused stalling on my 2001, and of course it was the one under the intake manifold.

What year is your truck? My 2016 Sierra had issues that I was able to clear up by replacing the negative battery cable, cleaning the connections of course. You need an oem replacement for this. But first, if I had work done and then had problems I'd be all over that shop blaming them.

So I have had the tuner for a while now, after I got it to work my truck is running a lot better. The shifts are tighter, no more banging and slipping as it downshifts at low speeds. I tuned it to the 87 and turned off the AFM. As far as getting it to work is a whole other story. I sat for an hour and a half as it kept spinning and was stuck at level 7 out of 10. Frustrated I called the service number through the app and the guy tells me that the battery needs to be on a charger through the process. That the connection keeps dropping because of low power. No where is this posted or discussed and is a negative feature of the device. But I'm tuned now and my gas mileage has actually increased 2 mpg. One other negative was ordering through American Trucks. They say 2 day shipping and the day it was supposed to arrive the package wasn't even shipped yet, so I called and canceled it and against my wishes they sent it out 2 days later. I will never deal with them again.

https://static.nhtsa.gov/odi/tsbs/2017/MC-10113356-9999.pdf

How do you like the Torque Management tune? Pretty sure I can turn it on or off, thinking about turning it off, I read it gives more response to the gas pedal.

I'm not really worried about the mileage, but I am a little psyched about a more responsive truck. Mine doesn't have modes, and I enjoy Sport Mode in our Acura, and would like my truck respond to the pedal, instead of the mushy stock feeling.

Just ordered this new tuner from Diablosport for my 2016 GMC Sierra. Anyone try this yet? Looking to turn off the AFM and tighten my transmission. Also says that I will get better gas mileage and more HP using the octane presets. Will update after I get it and set things up. https://www.holley.com/products/tuners_and_programmers/diablosport_predator_x/parts/DS-MFD

Actually I paid 422 plus tax for the entire kit.

Yup, hasn't been any issues at, truck is running strong.

I'll think the main issue was the ground cable, I bought a new one and installed it. I read somewhere it could be an issue.

At this point my truck is still running great, no more issues. I've driven it to Maine and South Carolina, I live in NJ.

There's a TSB on this also, but my dealership was too lazy. My truck is still running great since I did the repairs. Basically the ground cable was the culprit.

Yes the post directly above yours.

I have the same cover, love it. They also offer a military discount directly from Extang.

I replaced mine with the Bilstein 5100 HDs. Rides so much better.