I did this by removing the front tire way. My advice is to put the radiator hose on the new thermostat first making sure the holes on the thermostat line up without twisting the hose. I had my lower hose already on the bottom of the radiator but not tightened. Gotta tweak it. I tried putting the thermostat on first then trying to move that heavy duty hose clamp into place. Impossible.
I did this by removing the front tire way. My advice is to put the radiator hose on the new thermostat first making sure the holes on the thermostat line up without twisting the hose. I had my lower hose already on the bottom of the radiator but not tightened. Gotta tweak it. I tried putting the thermostat on first then trying to move that heavy duty hose clamp into place. Impossible.
HUMMER H3 THERMOSTAT 2006-2010 HUMMER H3 EXCELLENT PRICE and AC DELCO QUALITY! ''https://www.ebay.com/itm/HUMMER-H3-THERMOSTAT-2006-2010-HUMMER-H3-EXCELLENT-PRICE-and-AC-DELCO-QUALITY/112996781844?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649
He took the long route to removing the thermostat.
To much work! Trust me go in through the fenderwell. 20 min in and out.