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L5-3.7L

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Question
Starter problem due to several possible issues.
Try another key first to see if this works before going into diagnosis. If this works then a replacement key will fix your problem. If the theft light will not go out on your dash then you know it is...
Question
Ticking noise during quick acceleration
If you are using an oil bath type air filter it could be the cause of the problem. The oil in the filter can contaminate and coat the mass airflow sensor and throttle plates with oil. This will cause all...
Question
Car bogs down when I cut the wheels too sharp
Your vehicle has a variable power steering assist. If you turn the steering wheel, a sensor will detect that the wheel is being turned and if you go all the way to lock the wheel the assist is lowered. This...
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Oil Pressure Issues
The PCV system on this engine is incorporated into the air filter housing and has no serviceable parts. If there is excessive oil in the air filter housing then the entire housing would need to be replaced as an assembly....
Question
3.7 engine temperature gauge runs between middle to 3/4, leans a little more to 3 /4 never over is this normal
Hi there, thanks for writing in about your 2007 Hummer H3. The temperature should typically rest more towards the middle of the gauge. You should have the vehicle tested to see if the engine is running hot, or if it...
Question
Headlight not working
The headlight low beam may have gone bad when you got in the accident. The bulb would need to be checked and replaced. I recommend seeking a qualified mechanic, such as one from YourMechanic, to come and test your vehicle...
Question
Car suddenly went into limp mode
Hello and thank you for contacting Your Mechanic. Your Hummer could have the brake system engaged for the traction control. Disable the traction control and see if the engine will increase in speed. Another thing to check is the...
Question
Fault ABS fault traction
I would suggest first checking the ABS sensors at the wheels as they are known for being very sensitive and relaying false readings. Things as simple as dirt and debris can cause these to not work properly. Since these are...
Question
My car is overheating when the air conditioning is on - 2007 Hummer H3
Hello. Running the A/C will put extra strain on the engine and cause it to heat up quicker. If your vehicle is overheating, you should keep it below 280 degrees at all cost. This is the temperature when extreme irreversible...
Question
My service light says service temp. What do I need to look for?
Hi there. A low coolant level can illuminate the service light and create the heating and AC problem you have described. Check the coolant level while the engine is cold and top it off as necessary. Also, look around the...

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