20 Most Recent 2005 Chevrolet TrailBlazer Questions & Answers

try checking for a 12v feed to the motor and iam sure you will find one ,i think the problem is the earth as the earth is the one that controls the speed via the reostat and the control knob ,so if its works with an earth then its either the reostat or the control switch

If CEL is on then you need to read the fault codes for direction. You've swapped a lot of parts unnecessarily and likely created more problems than you solved.You won't be successful guessing.Keep your old GM original parts because after matket engine sensors/actuators are notorious for poor quality and usually create more problems than solved.

I would check the turn signal switch. The cruise and turn signal are on the same switch. The brake lights go through the switch before going to the brake lights. And the turn signals don't work with the ignition off.

Question edited for clarity, add maker and all the typos 'senors', 'reves', 'blazzer'. Question moved to model category. Please don't type in all CAPS, it is considered SHOUTING and is harder to read. You mean 'Solenoids'? https://www.google.com/search?q=2005+chevy+trailblazer+4.2+4x4+shift+solenoid+location ..

Sounds like the sending unit. That is where the wire plugs in for the temp gauge, on or near the thermostat housing.

Two or four ,depends on the engine size . 4.2 or 5.3 l

Why is my 06 trailblazer stuck in park on the speedometer it will crank up and you can move the shifter but it want move on the speedometer

CHECK SPARK AND FUEL RELAY

Hello. It seems your crankshaft position sensor may be at fault. Sometimes the MAP and/or MAF sensor can be at fault too. Does the 'Check Engine' or 'Service Engine Soon' lamp light on the instrument cluster? If it does, the ECM is, more and likely good. Good luck and keep me informed; if you want to.

Replace the master switch assembly.

try turning steering wheel whjle trying to start

Brake Transmission Shift Interlock System

Had the same issue with my 05 trailblazer. Replaced the four year old battery and the problem went away.

Try re-calibrating actuators, there's TUBE videos on how. I want to address the bad idle when defrost is on. You probably disconnected the battery, which is what caused this. Remove your throttle body and clean it with fuses #10 and #28 removed under the hood. That will fix the dying when AC or Defrost is on.

Take it to a garage that has a smoke tester. They pressurise with smoke and see where smoke comes out.

On the top of the headlight is a star shaped fitting. This is the adjuster. It works by spinning a gear that is mounted to a shaft to position the headlight up and down.

I've seen them fall off, where the headlight is not adjustable, infact, the bulb sits at the bottom position and bounces up and down.

Adjuster is not available as a part from GM, you are required to replace the headlight.

Hi.

The Chevy Trailblazer 5.3 and 4.2 engines have two knock sensors located at the lower sides of the engine block.

Below two diagrams showing locations first is from 5.3 right second 4.2 left.

Here are the Torque specifications: 1. Head bolts - 46 - 50.5 lbs 2. Intake & exhuast manifolds - 13.5 - 20 lbs 3. Flywheel - 41.5 - 47 lbs 4. Clutch cover - 13.5 - 20 lbs

Your battery is dead. Why it is dead is another investigation. Is it getting charged? If not the alternator could be gone. Charge the battery, or if it is 6+ years old, replace the battery, charge, and then test.If it runs ok with a charged battery, but the battery keeps running down, then it is likely the alternator or something in the charging circuit.OK, now we know you have checked the battery. The door locks not opening and the relay failing to pull up means they are not getting enough juice. So if it's not the battery, then its something else in the electrical system. Because two completely separate systems (locks, starter/relay) are affected, it is something common to both of them. But go ahead and check the fuses anyway. Also check all electrical connections (Battery and other) for corrosion or looseness

Most bolt heads are measure from one flat side to the other across the middle. Use a tape measure or a ruler to check. The measurement will be slightly under or slightly over the size you need. Round the number up or down to the nearest spanner size. You might need to use an adjustable wrench for an 8 sided nut.