Chevrolet Trailblazer Repair Questions


2004 SES Codes P0128, P0172, P0455, P0410, P0606
The garage checked out a few of the codes and said that all values and sensors were fine.  Garage did not specify which codes they checked.  Said they only checked out a few of the codes. SES will not reset, comes right back on with the same codes...

Idle Problem With My 2003 Chevrolet
My truck dies when i turn on the a/c or heat, it's fine when it's just running, and i am also losing some power with the buttons on the doors with the lock and unlock button, there is no other problems but the rpm's dip way down below one when idling

Scan Code P0128 How To Repair
My service engine light is on. The dealer said the code is P0128 "Coolant Thermostat Coolant temperature below thermostat regulating sensor. My temperature gauge reads okay and the vehicle runs good. Is it difficult to change this myself

Chevrolet Trailblazer Dies at Idle
When i turn on my a/c and let it idle the rpm dips way low and almost stalls until i rev it up again but if I let it sit it shuts off. Does the same thing when i turn on the heat. Aside from that the engine is fine, but only when the A/C and heat get turned on it starts to die

Code P0014
Should I  replace the cam actuator solenoid valve for this code on my Trailblazer. Does the power steering pump have to be removed.

2003 Trailblazer Stalls
Check engine light ans codes P1515, P1514,  P0335, P0013. Replaced throttle TPS and cam crank position sensors.

Truck Hard To Start
After driving for a while and then shutting off my Trailblazer, it is real hard to start. Sounds like it is flooded. Mechanic says it is the thermostat and serpentine belt.

How to Replace Air Induction Valve
Check engine light on my Chevrolet Trailblazer. Code came up for this part.. Can i do the repair myself?

Headlight Socket Burned
The headlight on my Trailblazer burned the bulb and socket so i replaced it. No fuses blew. Will this repair last.

2006 Code P0449 EVAP Vent Solenoid
Looking for a picture of the vent valve to replace because my check engine light is on with that the code.

Low Idle with A/C
My truck will idle very low and almost die out when turning on the air conditioning. What can cause this problem.

Clicking in Dash
When i start my GMC Envoy, there is a clacking near the A/C controls or maybe from the 4wd switch. A friend said it was a sensor. What could this problem be.

2006 Trailblazer Fan Speed Problem
The front blower motor speeds do not work on my truck. What's wrong with my truck? The rear A/C blower works just fine.

1992 Blazer Hesitating Badly
After my truck was sitting a long time it wont go when hitting the gas. We replaced a lot of parts. 2005 Trailblazer driver side low beam headlight the only one working.

2004 Trailblazer Shakes And Stalls
What's wrong with my truck? When i come to a stop with the air conditioning on, it shakes and dies out. Always when coming off the highway and slowing down.

How To Replace Crank And Cam Sensor
My 2004 Chevy has a check engine and i need to know how to replace the cam solenoid and crank position sensor. Also, is there any relearn that needs to be done.

2005 GMC Envoy P0128 And P0410
My truck is stalling and running rough when coming to a stop. We replaced the coolant temperature sensor but still have a check engine light.

GMC Envoy Codes P1400 And P0506
My GMC truck has a check engine light and codes for the emissions system cold start reduction idle air control. The throttle was cleaned and the light went out.

2002 Trailblazer Electrical Problems
I am having problems with the low beam lights, Onstar and check 4 wheel drive lights in my truck. No codes are recorded by the mechanic.

Ongoing starting Problem With My Truck
Sometimes the starter will crank and times it won't. The dash lights will not come on then will be. I have used this video to test the circuits. I replaced the ignition switch with no help.

How Many Oxygen Sensors On 2006 Chevrolet Trailblazer
I need to know how many O2 sensors are on my truck and the location of where they are on the engine.

2003 Trailblazer vents dont work
Even after battery replaced. Pulled fuses and installed and tried again.

Both low headlights out on my 2004 Trailblazer
Bulbs and fuse replaced. They both went out at the same time. I replaced both bulbs even though I would not think they could go out at the same time.

ABS, Brake, and other Indicators Always stay On
Speedo and tach work. After reading about the different problems with different seemingly unrelated indicators / gauges, i looked through some schematics. The thing that stands out is that the.

Trailblazer Has No Airflow and Blows Cold
Can you please tell me how to change the heater door actuator on my Chevy trailblazer? The air is not blowing right.

2001 Trailblazer Brake Calipers Locked Up
The brakes are locked up on my truck. Is this a fluid contamination? Also i am loosing coolant and no heat from vents.

My customer has DTC code p0016 on Chevrolet Trailblazer

My 2004 Chevy Trailblazer code p0410 secondary AIR injection

2003 chevy trailblazer a/c vents not blowing airflow

2002 Trailblazer dies, engine light p0014 p0016

Code p0455 large evap leak

Question: My 04 Chevrolet Trailblazer seems to engage the brakes when i turn.
 Answer: It sounds like you have an ABS problem. Either a bad front speed sensor, which is part or the wheel bearing hub, or a wiring harness problem to one of the front sensors. Have the wiring checked first.

Question: Hello most thrilling I write from Italy I have a chevy trailblazer 04 with 33,000 miles when I turn the key in the first position does not work at all, the remote control does not work and when you try to start the engine is not running. my electrician thought the ignition switch but not sure I know some of you help thanks to all
 Yes, does sound like a bad ignition switch.

Question: On my 2007 Chevy Trailblazer 4.2 vortec code po171 comes up.
 That is a lean code. Check for vacuum leaks. Especially around the air intake box and ducts. Also make sure the hose on the underside of the air box on top on the engine is in place. This is left off a lot of times when the the box was removed for some other repair.

Question: I have 2004 chevy trailblazer 4.2L it's missing I need to know what's the name of the part the spark plug sits in?
 The spark plug sits in the cylinder head. The ignition coil sits on top of the spark plug. Ignition coils are very common for causing a check engine light with misfire codes. If the misfire is only at idle, you may have a bad cylinder head.

Question: I need to know if i could adjust rockers.
 The rocker arms on the Chevy Trailblazer 4.2L are not adjustable. Just torque them down to the specifications.


Get Our E-Book Filled With Great Information


Q and A Main


How Things Work


Electrical