Hi, What do I have to remove to replace head gasket on 2003 chevy trailblazer LT 6cyl? Tank you!

Make sure you replace it after removal. It is part of the safety system and prevents you getting a broken neck in a crash.

Depress the large button on the head restraint guide and raise the head restraint to the full up position. Depress the smaller button on the opposite head restraint guide and pull upward to remove from the seat.Jan 16, 2022

Rear headrest removal ' Trailblazer Forum

yes under vehicle drivers side in front of fuel tank against chassis rail How To Install Replace Fuel Filter 2003 08 GMC Envoy XL Chevy Trailblazer

no- no recall on the fuel tank that cracks at the filler neck the following link are complaints about fuel tank that are recieved if you go to home page and enter trailblazer they give you the break down of the whole series of model and complaints as well as recall information they also list the TSB technical service bulletins
2004 Chevrolet Trailblazer Crack In Fuel Tank

code p0014 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

forums.trailvoy.com > ... > OEM Issues

Sep 8, 2007 - 11 posts - ‎8 authors
On my Trailblazer I have a code P0014 . this says Camshaft Position Actuator B ... If the desired and actual cam phase angle error exceeds its ... This diagnostic procedure supports the following DTC: ... replace the camshaft actuator solenoid, change the engine oil and filter, ... 2004 Chevy TrailBlazer LT P0014 - Camshaft Position Actuator Solenoid "Relearn"
11 posts
Dec 11, 2009
cam crank sensor mismatch
11 posts
Jul 4, 2009
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Tech Code "dtc P0014" 2003 Trailblazer - Chevy S-10/Blazer ...

www.gm-trucks.com/.../72278-tech-code-dtc-p0014-2003-trailblazer/

Dec 31, 2007 - 14 posts - ‎6 authors
Tech Code "dtc P0014" 2003 Trailblazer - posted in Chevy ... it had been serviced before for the same thing in 2003 or 2004! ... replace the camshaft actuator solenoid, change the engine oil and .... The extended war. co. prob. would not be to happy since they already fixed the sensor once or twice already.

Replace a Camshaft Position Actuator Solenoid Valve on a ...

? 8:05
https://www.youtube.com/watch?v=4Dkdd287AKg

Replace the regulator. The cables or gear for the motor is bad. You have to remove all the side panels going to the head liner, then remove the headliner. To unbolt the regulator. and replace it.

starter is on driver side just below head and bolted into transmission. usually accessed by removing driver front tire and access plate then you are able to look right at it and use socket wrench and various extentions to remove if necessary

I think the reason no one has answered your request is because the process is extremely hard and difficult to explain on a site like this. This type of repair is not recommended for an inexperienced person, especially because of the overhead cam timing mechanism.

Unless you are familiar with working on overhead cam engines, this is not a DIY project. To get to the point of accessing the head gasket requires quite a bit of disassembly. Then you need to deal with the cam timing during reassembly.

my 2003 Chevy Trailblazer EXT lt ac works/ but the fan won't go from low to any other setting? any ideas

according to the repair guide at autozone.com, there is a filter listed and the guide states that if there is a fuel tank shield, it must be removed to access the filter. autozone.com has the procedure for replacing the filter as well as many other maintenance and troubleshooting procedures. register and enter you vehicle info to access.