cbprov

Great thank u for reply

Hi I had my muffler and flapper cut of on my 2018 gmc sierra 6.2l my exhaust is 3.5 in ,shop installed a 3 in magnaflow muffler adapted it to my 3.5 in pipe ,will downsizing flow loose me any power or mpg or issues thanks guys

Hi is there any way on a 2018 gmc that has broken power running boards to extend them out and leave them out all the time .disconnect power or bolt them In extended form .thanks

Hi I am looking for a mpg tune ,power is okay thanks .

my 6.2 in my at4 runs rough at idle any body else have this or is this normal for the engine as it cuts out cylinders

I have it on the premium fuel performance tune ,and firmed up tranny shifts 75%,my truck has 33 12.5 20s ,chanced speedo for tire size ,I honestly feel more power and have seen a 2mpg fuel saving ,this is no bs ,I have never had a custom tune so all I can do is rate this canned tune thanks hope this helps

I bit the bullet and bought a hypertech max energy ,totally diff feel to truck now .better on fuel to

just installed 33 12.5 20s on stock allterrain rims with a 2 in level no rubbing

hi i finnally bit the bullet ,2in level 33x12.5x20 federal tires no rubbing mounted on my factory 20 in all terrain rims! , aggressive tire has some road noise will post picks soon looks great

it seems some trucks are differant then others ,some rub with 305s some dont ?

i need to know if 305 55 20s will fit on stock allterrain rims with a 2in level on front .will i have rubbing issues thanks

i have the same problem would love to do a blackbear tune ,but with the miles i drive will need my warranty for sure

so has anybody gone in for service yet and been questioned on the # of flashes on the ecm with a blackbear tune ,i really want to do it but our dealers are militant up here lol

i am waiting also to confirm they can not detect it ,it is killing me the wait ,trying to be patient

long topic very good read ,so has there been any developments on if they can detect black bear or other custom tunes at the dealer, thanks getting real itchy to do this asap !