How do i replace automatic shift boot on H3 Hummer 2006 How to replace H3 Hummer Automatic Shift Boot on a 2006 Hummer I have the new one.

SOURCE: transmission problem stuck in sport shift mode

I also have a 2009 Outlander Sportronic transmission with a V6 engine.
Bought it this summer ... transmission appeared fine but seemed to automatically slow down the vehicle using the engines compression whenever I let go of the gas pedal.
Now that the cold weather is upon us here in Canada, whenever I accelarate normally (not like a teenager) the transmission takes quite a bit of time to shift into second... If I rev up the engine (quick take off) it seems to help but the shifting of gears is not as smooth as I would expect it (mildly slips and kicks into second)...

The worst is when come to a complete stop ... then the transmission kicks coming down from the higher gears???

I read somewhere that this is because this transmission is a CVT type and is learning my driving habits in order to adjust itself so the vehicle becomes more fuel efficient... Not sure but if the trany is computer controlled then it must be poorly writen program...
I'm taking the car in to the dealer and will write back on the diagnostic they give me ...

SOURCE: Hummer H3 Losing power when shifting from 1st to 2nd gear.

as odd as this may sound, try replacing the fuel filter.

SOURCE: replace bulb on automatic gear shift console

If the shift console is on floor then look for bolts holding it down.  Take out bolts and then you can maneuver console so you can see where light is plugged in and get the right light to replace it.  It will probably be a small light which tend to cost a bit more, but at least you'll have the light back.

SOURCE: 2006 H3 Hummer fan problem

Hi if your internal fan not work in any position well i fixed up myself easy and save your money.
locate the fan motor air just outside right courtesy drawn document in front of passenger. go from down and look up you will see a motor with a big connector white with 2 screw secure inside the motor block. loose the two screws and pull out gently the connector from motor fan block. you will see a green multiresistor connected with this big connector. Usually the first + voltage connector is burnet out. disconnect the connector pull from resistor and check for any burn. in my case the first pin was burned out completely
you can buy another connector or you can clean the burned connector take out form connector weld a small copper cable of 5 mm dia from resistor to the burn cable and reconnect the connector without buy a new one. after replace again the resistor in the hole of motor blow with the 2 screw.
Done all work again without buy another new connector.
Gabriel from Italy Turin
H3 hummer 2007
loveling one and Humvee owner

SOURCE: 2006 Hyundai Sonata, 3.3 L

Hello and welcome to FixYa!
You may just have system failure. As a first course of action, I strongly suggest that you remove the positive battery connector and let it sit for at least 5mins. before reconnecting it. This will reset the system and can get it back to it's normal operation.
If the problem still persists, I believe that you will need to have the torque converter replaced. This can be caused by a faulty or worn out torque converter as well.
Hope this helps and thank you for using FixYa! Have a good one!