Hummer H3 with119,000 Miles, how does the drive train motor, engine hold up with that many miles?
There is virtually no difference between the Hummer H3 drive train and comparable GMC and Chevrolet drive trains. Although you overspent on a piece of pseudo-military jewelry, the drive train is reasonably reliable and easy to service, and parts interchange with GM truck parts.
My sole recommendation would be to use 15W-40 diesel-grade oil instead of the recommended oil and, if you haven't already done it in the last 20,000 miles, change all fluids (crankcase oil, brake fluid, transmission fluid, differential fluid, power steering fluid, engine coolant).
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: Hummer H3 rear lights staying on
if it is the brake lights that are on check the brake light switch on the brake pedal
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
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