20 Most Recent 2009 Hummer H3 - Page 5 Questions & Answers

well try this. start your car, then show to neutral then try to change the mode u want, if it does not help, then shift to Drive and then press button to change to mode u want, remember, keep brakes on, u dont have to move on both cases. most probably, in drive mode, this should work for you

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run the fault codes to get an idea of the failing sensor

get a self bleed in parts store less than 10 bucks start with longest line from fron rear passenger the rear driver side then passenger front and driver side last. fill up reservoir as you do this.

When engine is running the battery should putout 13.7 - 14.7.

is the car also over heating after a while? If so I would suggest checking the thermostat

The bcm is located inside the dash board in between the headlight control and the instrument cluster

have a compression test done to check for burnt valve , loose valve seat insert, valve held open by faulty cam follower/ hydraulic follower

Did you have the new BCM programmed with proper RPO , this options that came on your vehicle ? Regular Production Option. A Regular Production Option (RPO) is a General Motors standard coding for vehicle configuration options. These codes are a combination of 3 alphanumeric characters and refer to a specific option or modification to the vehicle. You probably caused the problem . You are going to have to take it to the dealer .

is battery dead if it is than boost battery and turn off key will come out --if not undersie of steering column is a small plug remove plug and with a strong wire or small screw driver push up on release button for key H2 Hummer Key stuck in ignition

The shift solenoid is located at the bottom inside the transmission box(gearbox) of the car