Question about 2003 Chevrolet TrailBlazer

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How much does it cost to replace a coil on the engine of a 2003 trailblazer

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You can find prices on that at rock auto.com, i get my parts from them and the ship fast,i've used them for many years,go to there web site and you can call them too.

Posted on Sep 10, 2009

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Posted on Jan 02, 2017

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How do i put new coilpacks on my 2003 trailblazer?


Hello Deborah,

Place a spark tester on your coil lead to test for spark.

If you have fuel pressure, reasonable compression and a spark your engine should at least try to start.

Why did you replace the coil packs in the first place? and did your vehicle run before the swap?

Jul 22, 2017 | 2003 Chevrolet TrailBlazer

2 Answers

How much does it cost to replace it


What are you trying to replace?

Nov 26, 2015 | Cars & Trucks

2 Answers

Replaced 2 coil packs and still running rough 2003 trailblazer


try replacing or cleaning the injectors
when misfiring moves around it is seldom the coils , plugs and any thing else connected to spark but dirty fuel, low fuel pressure and dirty injectors or injector control
use a quality injector cleaner for a few tankfills

Sep 02, 2012 | 2003 Chevrolet TrailBlazer

1 Answer

Spark plug replacing on a 2003 chevy trailblazer


Take the plastic resonator off the top of the engine, along with the aircleaner and ducting.

There you'll see 6 coils, each has 2 screws, do one at a time so they don't get mixed up. After the 2 screws are off, pull the coil straight up and out. There you'll see the plugs. I'd suggest using A/C Delco 41-103's as these engines love these and will idle better than most other brands. Hardest one to get to is the cylinder next to the fire wall because of clearance, but with some extensions and elbows, it's doable. When replacing the coil onto the new spark plugs, make sure you listen, or feel for a little click. If this is not felt or heard, it may not be on correctly. Many people have made this error, and your engine will not get spark to that cyclinder until corrected.

Jan 23, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

My 2003 chevy trailblazer is getting a po301 code and i'm wondering if you can tell me where the number 1 cylinder is?


Very first one in the front of the engine. Cheapest way to fix this is to replace your spark plugs first. Use AC Delco 41-103, a little more than off brands, but will idle better than any other plug. If this doesn't work, replace the coil pack on cylinder 1. One of these will fix the problem. Also, check the wires that coil plugs into, if all else fails.

Dec 13, 2010 | 2003 Chevrolet TrailBlazer

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Engine misfiring Check engine light on Code # PO301


Did you recently have your spark plugs changed? If so, putting the coil boots back on correctly can be a problem. When installing them, slowly push down until you hear/feel a snap. Another common problem is a bad coil, it happens, but lets hope not. There are 6 coils, 1 per cylinder and they cost around $75 each. Those are the 2 main problems that will trip that code for Trailblazers.

Dec 11, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

Whee are the spark plugs located on a 2003 chevy trailblazer


Underneath all the plastic on the top of the engine. Remove the plastic and remove each of the 6 coils, (2 bolts for each coil). Your plugs are under each coil. Use AC Delco 43-103's, TB's love these more than all others.

Nov 29, 2010 | 2003 Chevrolet Trailblazer Ext

1 Answer

Where are the spark plugs on my 2003 chevy trailblazer?


on the both sides of the engine they probably have coils sitting on top of them instead of plug wires

May 16, 2009 | 2003 Chevrolet TrailBlazer

2 Answers

2003 Trailblazer sometime stalls when I come to a stop...


its most likely the throttle body is dirty, just remove the air box on top of the engine and clean the throttle body out with carb cleaner.

Apr 24, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

How do you change the ingnition coil for a 2003 chevy trailblazer


it would not be the ignition coil....injector cleaner could help it, most people add it to the gas to help maintain clean injectors and you should do the same. as far as the coil no leave it alone.

Feb 19, 2009 | 2003 Chevrolet TrailBlazer

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