Check Engine & Trans fluid questions

[jersey]

The U was likely bent when the rear spring passenger side popped in a NJ turnpike pothole. From there the steering wheel was turned nothing short of sideways. My wife had the H3 that day and drove it home like that for 60+ miles instead of calling for a tow truck. I took it to a local firestone and they threw in two new springs which they ordered from a local chevy dealership. That was September 2012. I'm starting to think the other driveline problems are related to that event too. Spring of 2012 I had the gear fluids replaced front and rear, is it possible that there's too little fluid? I'll ask my mechanic to check that too.

Edit: Come to think of it, I thought the idle was a little rough as I recall the steering wheel has a bit of a shake to it when it's just sitting in the driveway running...think there's something to that?

[iwillnc]

What year is it? if it's an 07+ 3.7l i5, then it should be smooth as butter, they are extremely smooth engines.

06, 3.5 was slightly rougher, but nothing "bad" by any sense

[jersey]

Yup. It's the 06 3.5.

It doesn't bother me too much, but it's there.

[HUMTECH]

Have you checked tire balance, front shaft u-joints?

[jersey]

Yup, checked the whole front end courtesy of lifetime alignment plan at Firestone. All was well there. Had all the ignition coils changed and that smoothed it right out.

I'm wish I could changed the title of this thread to Slow Death of a Hummer. After a month and a week of smooth rides here comes Death at my doorstep again. The car has started overheating reaching the 3/4 mark every day even after short rides. In February we changed the Thermostat out for factory new dealer replacement, also changed the belt and tensioner and radiator at the same time. This time Mechanic suggested the fan clutch because it seemed to move to freely when the car was off. I said ok, however two hours later when he tested it, the temp still came up. He got an exchange for the radiator we installed thinking the one in there was possibly defective; retested and the temp still came up. Pulled everything off the front of the engine double checked all his work and still is still scratching his head. He's going to replace the thermostat today even though its just a few months old.
He said "I hope it's not the head gasket".

I say, I see no loss of coolant whatsoever over the last few months since doing the radiator. No oil discoloration or mixing of fluids, no excessive tailpipe smoke. Nothing to really indicate an obvious head gasket problem. Hopefully it's just a faulty thermostat. Fingers crossed. Updates to follow.