20 Most Recent 2005 Chevrolet TrailBlazer Questions & Answers

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

2005 Chevrolet... • Answered on Mar 13, 2021

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.

2005 Chevrolet... • Answered on Mar 03, 2021

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

2005 Chevrolet... • Answered on Feb 28, 2021

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.

2005 Chevrolet... • Answered on Feb 17, 2021


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.



2005 Chevrolet... • Answered on Feb 12, 2021

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

2005 Chevrolet... • Answered on May 21, 2020

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

2005 Chevrolet... • Answered on Oct 27, 2019

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.

2005 Chevrolet... • Answered on Oct 04, 2019

This sounds like a failing fuel pump. If the power is on and you loose pressure the pump is bleeding by. Replace with an AC Delco pump only this has been an on going issue with after market brands.

2005 Chevrolet... • Answered on Sep 30, 2019

You can order through your Chevrolet dealer.

2005 Chevrolet... • Answered on Sep 29, 2019

hi, sounds like you may have a crack in one of the lines,or the front of the pump has a seal that could be leaking, depending on the style of the pump it could be the seal on the tank side leaking on the pump.

2005 Chevrolet... • Answered on Jun 27, 2019

Ur evap system in tank area has issue...probly the solenoid. Get a smoke test done and a scan

2005 Chevrolet... • Answered on Jun 27, 2019

The 4.2 engine is an inline engine. The #4 cylinder is the 4th cylinder from the front. The firing order is 1-5-3-6-2-4

2005 Chevrolet... • Answered on Jun 27, 2019

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

2005 Chevrolet... • Answered on Jun 27, 2019

The OnStar module is located under the right rear passenger seat, unhook the connector. Also, fuse #27 in the rear fuse panel is for the OnStar, but the DVD player as well.

2005 Chevrolet... • Answered on Jun 27, 2019

near the front of intake on the drivers side. its right beside the intake has 2 hose connections and an electrical connector

2005 Chevrolet... • Answered on Jun 27, 2019

There's a website that has all this informatio n about all this and manuals everything totally free there are many actually but I personally like few . reliable-store let me know if u need help thanks

2005 Chevrolet... • Answered on Jun 27, 2019

there's a website reliable-store all heavy equipment repair issues servicing, loading, wiring, engine problems everything is covered here its a must try

2005 Chevrolet... • Answered on Jun 27, 2019

in relation to the cruise control ????? There is no vacuum used for cruise control on your vehicle . Your vehicle has a computer controlled electronic throttle system .The powertrain control module (PCM) monitors the signal circuits of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed. The PCM uses the throttle actuator control (TAC) module motor in order to control the vehicle speed. For further information on the TAC system, refer to Throttle Actuator Control (TAC) System Description . Your best bet , take it to a qualified repair shop. Need a factory or some other professional type scanner to check for codes an data input from the switches to the PCM

2005 Chevrolet... • Answered on Jan 23, 2019

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