<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by MAC:
"Ed you may want to take a Prozac before you read my post." 
<HR></BLOCKQUOTE>
Mac,
I will pass on the prozac, maybe save it until I really need it?
I just got home from a dinner up in Tampa, with some very special, "old" friends... One of whom was a chopper jockey that I first met exactly 33 years ago today. It just reminded me, once again, how wonderful and fantastic it is to be alive.
As for the really meaningless stuff? I drove the 60-some miles back home from Tampa on I-75 (we don't say "the 75") and I decided to try using the tow/haul mode selection. It surprised me that as I was driving along at about 75mph, turning approximately 2100rpms --- hitting the tow/haul button did not increase rpms at all, or have any other immediately noticeable affect...
But, as I drove along, I crossed several overpasses and did NOT experience the dreaded downshifts. I was just beginning to think that this had cured the problem when, for NO reason at all, the H2 shifted down, the engine increased to about 2900 rpms, and then almost immediately --- shifted back into fourth gear. We weren't even on an overpass.
Totally flabergasted, I turned off the tow/haul mode --- again with no noticeable change in engine revs --- and drove the rest of the way back "normally".
I don't know exactly how many overpasses we had to climb, but the H2 never downshifted again. I don't know why. It seems as though the H2 has a mind of its own?
Maybe instead of getting a programmer and supercharger, I need to hire an exorcist?
I guess I will start keeping a log of when it downshifts and also when it doesn't... When I get enough data, say in two or three years --- I will publish a treatise on the shifting vagaries of the Hummer H2 when using cruise control.
What I did notice was that my previous posts were not absolutely accurate in that I said the downshifts were from 4th gear to 3rd gear, when in fact --- the downshifts go from 4th gear to 2nd gear. It is not just a gentle shift when it does this, it is extreme... and most annoying. Passengers riding with me usually gasp or jump and ask me what's wrong...
Maybe it's a gremlin?
Ed