04Yukon

I had my Yukon tuned by mean05 back in 2008. Recently started getting Reduced Engine Power on a frequent basis. I've done research and found it could need a tune update. mean05 will not respond to vm, text or pm's. So my question is: is it possible to have someone else work the tune? If so, who in the Mesquite, TX (or Dallas) area does reliable work?

Gadgetized

iTrader: (9)

It will not just throw a code because it needs to be updated. There is a problem somewhere. What codes is it throwning when it goes into REP?

TXSZ66AVLANCHE

iTrader: (7)

^ what this guy said

KLUG'S SS

iTrader: (6)

These darned drive by wire trucks have been known to have the throttle bodies go bad, the throttle position sensors in them can take a crap and then it will want to go into REP mode.

Had one go bad on my 03 this summer, had a p2135 code and anything over 10% throttle and truck would go into REP. The p2135 I had when mine went bad if I remember just off the top of my head said something to the effect of tps correlation issues between sensors A and B.

1FastBrick

iTrader: (17)

GM also has a TSB about the wiring becoming brittle and breaking.

Without the trouble code's we don't know where to point you.

KLUG'S SS

iTrader: (6)

Yes they did, good point bringing that up I forgot about that. The part of the wiring harness that goes to the throttle body. Their is a good set of test procedures I found online before that are right from the GM service bulletin that explain what wires to check out and whether or not it's a wiring issue or the throttle body itself. I think their have even been some cases where the TAC (throttle actuator control) module on the firewall has been bad as well.

TXSZ66AVLANCHE

iTrader: (7)

Had problems with mine most of the summer, finally fixed it be replacing wiring all the way back to the tac module.