I got my hummer h3 about a month ago, and i am in love with it. But this week problems keep on popping up and i have no idea what is going on. The check engine light keeps coming on and turning off, the battery died with my keys stuck in ignition, it got 12 miles to the gallon on the last tank, the inside lights won't turn off and the dash doesn't say "doors", the tire pressure monitor keeps on turning on, and on top of all that the dash now says AC off. Does anyone have any idea what in the world could be going on with my car?

 

What's the temperature outside? What have you checked so far? Did you check your tire pressures. Did you have your battery checked? Did you check your interior light switch setting & door switches? Did you have your computer scanned for codes? So many problems, with not much information? Year, mileage, condition, any history report...etc....

 

unless you bought it from a stranger, my first step would be to go back where I got it. dealer?, used car lot? they usually have some responsibility.

 

I've seen a bad battery do crazy things to electronics including setting off check engine light...

 

I took it to a mechanic and he said that my radiator was broken, and it would cost 900$ to fix it, then 500$ more to tune it up and fix everything else? This all seems fishy to me, a radiator is 280$? Its like 50 degrees and its not past halfway on the temp, its not leaking any fluid how could it be my radiator? I'm really worried, I don't have 1400$ to fix this car with. He said that a branch hit my radiator while i was mudding, i haven't been mudding in 2 weeks. It seems like it runs fine, theres just a bunch of small things that i can't explain. It's an 07 H3 with 75,500 miles on it. We got it for 15000$ out the door, it would explain why we got it so cheap. We got it from a private dealership 3 hours away, so i don't have time to go back or to figure out all of these mechanic problems.

 

the codes that popped up were a P0305 and P0300 codes which are random misfire codes and thats a 100$ fix, so how would it be 1400$ to fix my car?

 

The tire pressure for my goodyear silent armor which are almost past the wear mark are all set to 36psi

 

the low tire pressure light has been the most problematic thing in both of our Hummers. I check the tires all the time, and the pressure is the same as before. One of them has sensors that are only two years old

 

Do this your self...switch coil 5 with coil 1, change your plugs and clear your check engine light...when the light comes back on hopefully you don't have a p0305 and it switches to a p0301 which would indicate a bad coil...if the code doesnt switch to p0301 and is still p0305 you have bigger issues...then IDE do a compression test on that cylinder....followed by a leak down test if it fails the compression test...

The radiator is not that hard...buy a radiator and do it yourself!

 

If you bought from a dealer there are laws on tire safety...what is your warranty? Might be worth the drive back since you have so many issues...