Diablosport Forums

i have the u7180 programer, for my 04 gmc sierra 4x4 mods are 6in fabtech lift 325x60x20's k&n air filter,4 in magna flow exhaust, usually run it on the 65 or 85 hp tunes, and now when ever i set the cruise control it surges? it can't maintain a steady throttle before i installed the tunes it was fine, any idea's ? it's not that big of a deal just sorta of annoying. and it's definetly not something i am going to pull the programer for. just would like to make it go away if possible. other wise i love it,and have recomended it to several friends who now own one. thanks for any help or ideas.

This is a new one to me.
Is this a California vehicle?
Has it been serviced at the GM dealer recently?

no it's not a calif vehicle no cat,and it doesnt say complies to calif epa regulations under the hood on the emission sticker. and i have had it for over a year and it's never been to the dealer for anything as long as i have had it, like i said it's not that big of a deal just sort of annoying, and i tried it today on the freeway and at speeds over 65 mph it seemed ok. but at speeds 45 and under it surges. it's not like i use it allot at speeds under 45 mph. usually when i am going through a place where i know the police have speed traps set up. anyway if you can think of something let me know and i'll give it a try. thanks for you speedy reply.

Does the truck display any trouble codes?
Try disconnecting the batteries for a while to see if this helps.

Thanks

no, no codes at all, even checked with the programer,no dtc codes found.none even stored in history.?? no ses nothing.

no, no codes at all, even checked with the programer,no dtc codes found.none even stored in history.?? no ses nothing.

When was the last time you changed your fuel filter? Dirty filter will cause all kinds of surge issues.