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2005 Chevrolet Trailblazer Questions

Get answers to questions about your 2005 Chevrolet Trailblazer at RepairPal. Find solutions, diagnose problems and get back on the road.

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231
questions

My nephew put a new radio in, when he was finished, I had no headlights, the ac didn't blow out air and some other lights did not work as in the radio and inside lights.

Cannot tell how much fuel in tank

Battery died yesterday. Put new battery in today. Blazer will not start everything seems to be working except it will not start. The passlock system flashes three or four times then stays on steady. Have been told that I need to reset the passlock since I had no power for so long.

just replaced the throttle body on my car but the transmission light is still on, how do I reset it?

My speedometer stop working and plug a little computer and now I have a code c0055 vehicle speed sensor circuit..and I need to know where is located this sensor

The transmission lines are corroded/rusted so all lines including the cooler lines from the transmission to the radiator need to be replaced.

Is there an easy way to get to these lines without dropping the transmission?

I need to know where is located the vehicle speed sensor circuit

Fully charged. Wont turn over. Just dims the lights wen u turn it over. Starter is getting power, it turns over wen i start it from the cylinder. But not getting fuel or fire. Just cranking over dry. Im thinking its the anti theft. Is this common in these vehicals? I tried dicoing the bat, connecting it. Then waiting half hr. still nuthing.wats your thoughts?

I have an engine error code P0410. The air pump does not come on when engine is started. The 60 amp fuse in the engine fuse box was blown. The pump and hoses were filled with water. I replaced the fuse and the check valve on the manifold. I figured this was faulty which caused the water in the hoses and pump. I removed the plug from the pump and checked for 12 volts after the engine was started. No voltage was present. I removed the relay from the pump and disconnected the plug. I measured 12 volts across the coil. Figured the relay was bad and replaced it. Still no 12 volts at the pump connector. Could use any help from here.

I replaced the coolant temp sensor. I am still getting a PO128 code. I tested the sensor and it tests good. The gauge reads 200. What else could be causing the code?

I've changed the coolant temp sensor 3 times. What else could be the problem?

We have a 2005 Chevy Trailblazer that has recently been having an intermittent starting issue. We have replaced the battery, ignition switch, starter relay and had the starter tested - it's good. So we are not sure what to do. The car may start for several days and then you go to start it and all the lights come on and the accessories work, but it won't start. After lots of tries it may start and it may not. We would appreciate any help and advice.

Thank you!!!

When Heat turned on in floor or defrost mode, loud knocking from under center of dash. Vent mode is quiet. When I press the re-circ button, it flashes for a second or two, but never turns on... Would this be an accuator? what would I be looking at to fix or have fixed? THANKS!!!

the tube for the air filter box came loose and got wedged to where it was being chewed up by the fan.

No air flow from front vents plenty of air flow in rear vents.Thanks Jeff