This sound like either the fans or fan is not coming on or not performing like it should, or coolant system is clogged or low on coolant. if you have electric fans turn the a/c on are they both on ? if you have a clutch fan attached to the motor when the a/c on and engine at operating temp put your hand over engine is the fan realy pushing air out? if not its bad . you can check the temp of each side of the radiator to see if the is a difference this will tell you if their is a clogg. so check fans and check coolant system for a leak , for proper circulation , when was the last time you had the coolant system flushed ? and gm uses a different coolant then other makes if someone put regular green in with the dexcool it will become corrosive and can eat blades on water pump not allowing it to function like it should pumping coolant andit will clogg the system.
SOURCE: I have a 2007 H3 hummer, suddenly my fan does
It's the HVAC blower resistor in the air plenum under the glovebox. New resistor and wiring harness is about $70 at the Hummer Dealer.
SOURCE: overheating when i stop up 30 minutes and it's back to normal when push the accelerator
this sound like either the fans or fan is not coming on or not performing like it should, or coolant system is clogged or low on coolant. if you have electric fans turn the a/c on are they both on ? if you have a clutch fan attached to the motor when the a/c on and engine at operating temp put your hand over engine is the fan realy pushing air out? if not its bad . you can check the temp of each side of the radiator to see if the is a difference this will tell you if their is a clogg. so check fans and check coolant system for a leak , for proper circulation , when was the last time you had the coolant system flushed ? and gm uses a different coolant then other makes if someone put regular green in with the dexcool it will become corrosive and can eat blades on water pump not allowing it to function like it should pumping coolant andit will clogg the system.
SOURCE: After driving through the snow My 2009 Hummer H3
I’m happy to assist further over the phone at https://www.6ya.com/expert/ramy_d9e7ebea3891f482
SOURCE: DOORS displays on DIC in 2007 Hummer H3. All
i beleive those have their own door switches in latch i would try to clean latches with spray brake kleen then blow out, lube with a spray lube like wd40 that may solve your issue. while your doing this remove negative battery cable so the ecm has to recheck doors system.
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