FAQs—Chevrolet Trailblazer EXT
My Chevrolet Trailblazer EXT was running fine but just suddenly quit. The transmission won't shift and won't go into any gear. Can you tell me what to look for or what could be wrong?
If your vehicle has automatic transmission and it refuses to go into gear, you may have to check and make sure the transmission fluid is at the right level. The problem could also be because of incorrect type or thickness of fluid. If you've already checked and the fluid is fine, you can try resetting the vehicle's computer system. What you need to do is to detach the battery and let it stand for about thirty minutes. After thirty minutes, reattach the battery and allow the system to reset itself.
A lack of response while driving the car can be caused by a clutch that needs replacement. You may need to consult a mechanic to make sure that the clutch is indeed the problem—sometimes the problem can be more severe.
At about 50,000 miles, the fuel gauge on my Chevrolet Trailblazer EXT started fluctuating. It finally stayed stuck on empty, and the check engine light started coming on especially after refueling. Help!
After high mileage, the fuel level sensor in the fuel tank may fail and cause an erratic fuel gauge operation. You may need to replace the complete fuel pump module to address the problem. If, however, you want to troubleshoot the problem by yourself, you might want to start by isolating the problem. It could be the gauge, the sending unit, the fuse, or the wiring. The most common gauge problems are usually caused by a bad ground or failed sending unit. Check the ignition 12-volt power feed and make sure that it is powered up. The next step is to remove the wire from the sending unit and ground it to a chassis ground. The gauge should immediately go to empty with the ground attached and back to full when the ground is removed. If the sending unit and gauge respond correctly, the problem could be with the fuel tank assembly—this will have to be replaced.
The Check Engine Light comes on while I was driving my Trailblazer. A friend of mine suggested that it could be due to a loose gas cap. Should I be worried?
According to most mechanics, a CEL (check engine light) caused by a loose gas cap is not something that you should be overly concerned about. It doesn't affect how the engine performs. It is only mandated that a warning light comes on during a fuel vapor leak to minimize its effects on the environment. Yes, the gas cap is meant to prevent fuel vapor leak in the vehicle's evaporative emissions system. This can easily be fixed by replacing the loose or worn gas cap with a new one. What you should be worried about is if the CEL is caused by other problems. Make sure to have your vehicle diagnosed properly to pinpoint the real culprit of that CEL.