Linus..... I asked teh dealer about that because I still have my stock rims/tires sitting in my shed. He said that if I wanted to put them on and bring it in with a full tank of gas that they would drive it for 1/2 a tank and refill to see where the mpg are at, but.... depending on how busy it is it could take anywhere from a week to 2 weeks. This was the same answer from all three dealerships within 50 miles of me. I'm not at the point yet where I am that concerned overr it to let them have my truck for 2 weeks so a tech can do god knows what with it while he burns 1/2 tank of gas. I have a call into gm though about it...my gripe is the dealerships won't even run the pcm through a programmer to see what the settings are...damn I know it can be done, we did it all the time when I was a gm tech. Hopefully the regional service manager can get at least taht done for me.

 

That sounds like you would wind up getting the used end of the stick on that. I envision mechanics and parts people running all over town picking up parts from vendors, and taxiing people around, at your expense. It would seem to me that they could plug a scan tool into it and drive it around the block while monitoring fuel flow

 

I'm betting that, for some reason he has oversized Injectors..




Take it away

 

that what my wife said too....oh never mind...different type of "injector"

 

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PCM tune.........

How much did that set you nack? How muchwork is involved?

Gracias in advance.

 

There's quite a bit of info here:

https://www.hummerforums.com/m_25589..._1/key_/tm.htm

You can also go to www.pcmforless.com.

 

Check out the threads on the forum. To make a long story short, it's not a whole lot of work, and the results are awsome. It feels like you are driving an entirely different car. The pickup is better, the mileage is better, and the overall power is better. It's definintely worth the time and money.

 

Cool. Thanks for the insight.............Rutt.....I always have a hard time reading your posts. I can't figure out why?

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I don't know....is there something distracting you?