Hummer h2 2003, acceleration issue, but only when it starts moving and in 1st gear the Truck move slow but after 1st gear, truck runs great

SOURCE: truck wont move in gear [manual trans] why?

push the clutch pedal all the way and see if the slave cylinder pushrod is going out at least an inch, if not replace the slave cylinder, if it does goes out, sad to say but you have problem somewhere else inside your clutch assembly

SOURCE: 1987 Suzuki Samurai Clutch problem.

The last time this happened to me, the clutch cable had worn through the out cable housing and had to be replaced.

SOURCE: 2006 H3 Hummer AC/Heater Fan Motor

I brought my 2006 H3 in to the dealer for the same thing. My blower stopped working all together but it started as an intermittent problem. He said he had to replaced a diode or resistor either behind the switch on the dash that controls the fan or on the fan motor itself. Have not had a problem since but that was only about 4 months ago.

SOURCE: Engine starts but truck won't move when put in gear.

cheak tanny oil level

SOURCE: volvo xc70--engine starts but truck doesn't move when put in gear

check tranny fluid.if fluid level is correct.change fluid and filter if its been a long while.if it still wont go into gear.your tranny oil pump is worn.and the forward clutch seals and drive plates worn.