Get a diablew tune!!! Hit up lew "06Montess" he will hook u up

Sorry to hear about your issues but these guys will work it out!! I have never had any of your issues but then again each truck is different. Only probs I had was some bad 93 oct. Gas and exhaust leak that I fixed with some short tube headers.lew then dialed me in and it hauls ass now!

yeh diablew if only way to go!!! like a new truck.definately data log with predator hooked to laptop if you can.way easier and you see live data and know that you are recording. Lew took alot of time dialing my truck in and gettin all the knock out of it.top notch service! Lew just waitin for this ...

Get a custom diablew tune from lew "06montess" I have 8.1 Yukon and huge difference from stock tunes

i would say im averaging around 9 to 9.5 with all in town driving.have a hard time with that right foot though.....talk to Lew "06MonteSS" he does the Diablew custom tune via email. he spent a ton of time with me and my 8.1 to get it dialed in perfect. i had a ton of knock but he got rid of all of ...

Get a diablew tune!! I have 8.1 diablew tune and I love it

just wanted to send out a thanks to Lew for all his work on my 8.1 yukon xl!!! couldnt ask for better service.anyone out there not able to decide on custome tune beleive me you WILL be happy...now i just need to find me a "black bear"tuned yukon like mine to say whats up??thanks again Lew

Thanx lew I finally got my headers and was waiting to have them put on before I hit you up with another log to c if kr is gone

Have 03 Yukon with 8.1 with 180deg tstat people on gm forum sayin need to tune for cooler thermostat.I hVe diablew tune was curious if anyone else hAs had any issues with different t stat.haven't gotten tune finished yet as just got headers to fix my exhaust leak and hopefully rid my truck of the kr

oh yeh forgot as to the vararam??? may ship it back not impressed with 0-60 is 3 tenths slower than before i put it on.does sound good but thats it so far. still had Kr with log bfore vararam so that hasnt changed

Morgoth, what was your fix for the KR?as for t-stat yes its cooler than stock and plugs gapped to .45.. on other forums plenty of 8.1 gapped at that with tunes.so if thats an issue shouldnt Lew b able to compensate for that in his tune?guy that put my exhaust on will machine manifolds flat again and ...

ok i have 03 yukon with 8.1 and allison.have Diablew tune but have KR in all of wot runs.... checked for anything loose under truck and nada...do have exhaust manifold leak which is ticking sound but lessons as truck heats up.plugs are new gapped to .45 t-stat is 180* i onlly run 93 octane ...

had same prob just set program as admin..

yeh i saw that and sent him message but havent heard back yet.thanx, puttin new tune in now. do u want another log after 50 miles?

just wonderin if anyone has seen any significant gains with vr6?