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I have a 2005 Chevy Trailblazer. I have two cylinders that
I have a 2005 Chevy Trailblazer. I have two cylinders that are not firing. I changes the plugs and coils and I still the same 2 cylinders are doing nothing. I changed the computer and still nothing on… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,895 satisfied customers
I have on 04 chevy trailblazer. We have changed all coil
I have on 04 chevy trailblazer. We have changed all coil packs and spark plugs and the code p0300 still comes on... it idles a little off and only has rough take off. When you first take off the rpm g… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,895 satisfied customers
2006 Chevy trailblazer 4.2, 230,000 miles. I changed all 6
2006 Chevy trailblazer 4.2, 230,000 miles. I changed all 6 coil packs. Now I am getting codes P0351 through P0356. One code for each coil pack. I bought the ACDelco brand so I would know I was getting… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Runs rough after plug and coil pack replacement. Check
Runs rough after plug and coil pack replacement. Check engine light on … read more
GM Tech (Cam)
GM Tech (Cam)
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Vocational, Technical or Trade Scho
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It mis fires at 50 miles per hr, Chevy Blazer 2008 We have
Chevy Blazer 2008 We have changed out 2 coil packs It fixed it a little. … read more
Pete
Pete
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General auto certifications
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My 02 trailblazer is misfiring. After getting a P0303 code
My 02 trailblazer is misfiring. After getting a P0303 code on my obd scanner, I changed the spark plug. I was still getting the same misfire and code so I replaced the ignition coil pack. The truck is… read more
HondaPlatinum
HondaPlatinum
Vocational, Technical or Trade School
25,566 satisfied customers
Here. Wife's 2002 trailblazer has bad engine miss, code said
Customer: Hi, ***** ***** here. Wife's 2002 trailblazer has bad engine miss, code said misfire cylinder 4. I replaced the coil pack and then code showed multiple misfires, I changed all the plugs with… read more
Amedee
Amedee
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Vocational, Technical or Trade Scho
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I had a p302 code on 2003 Trailblazer. The truck was running
Customer: I had a p302 code on 2003 Trailblazer. The truck was running rough. My wife picked up a new coil pack at auto parts store and brought it home. I replaced the coil pack on cylinder 3 but my w… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
10,964 satisfied customers
My 2003 Chevy trailblazer is only getting power on the first
My 2003 Chevy trailblazer is only getting power on the first 3 wire going to the ignition coils and the last 3 wires the current is very low… read more
Ron
Ron
Automotive Tech
Vocational, Technical or Trade Scho
37,727 satisfied customers
i have a 2004 trailblazer that started hesitating under acceleration
i have a 2004 trailblazer that started hesitating under acceleration and running a little rough at idle and gave a P0304 code. Changed all plugs and #4 coil pack. Still running the same and check engi… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevrolet Trailblazer LS: We just replaced the coil pack in
We just replaced the coil pack in our 2005 Chevy trailblazer ls and now its not wanting to start. The guys at the parts store said it could be a security issue and might need a code?… read more
Dan
Dan
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Vocational, Technical or Trade Scho
23,941 satisfied customers
2006 chevy trailblazer: inline..missfire..coil packs..miss
2006 chevy trailblazer 4.l inline 6. Wanted to try E3 plugs after changing had a missfire. So I changed back to old plugs took extra care with coil packs. The miss wtill continues. When I removed the … read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
2003 CHEVY TRAILBLAZER: HEADLIGHT..voltage gauge SHOW..ALTERNATOR
I HAVE A PROBLEM WITH MY 2003 CHEVY TRAILBLAZER I NOTICE WHILE DRIVING THE TRUCK HEADLIGHT WOULD FLICKER BY THEMSELF NEXT THE VOLTAGE GAUGE SHOW A LOW CHARGE I CHANGE THE BATTERY NOTHING HAPPEN STILL … read more
Tim West
Tim West
Service Manager
Computer/ Automotive certifications
16 satisfied customers
Chevy Trailblazer: My 2002 V6..We already replaced that coil.
My 2002 V6 Chevy Trailblazer is still giving a P0305 code. We already replaced that coil. Wires/connections were good. What else could be wrong? Should we replace all the coils?… read more
Ron Z.
Ron Z.
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Vocational, Technical or Trade Scho
2,836 satisfied customers
2005 trailblazer: blew..fuel rail..back together..misfiring and smelt
my 2005 trailblazer just blew an engine at 60000miles. I took an engine out of a 04 trailblazer, switched the fuel rail and got it all back together. when i started it it was misfiring and smelt like … read more
Tim
Tim
High School or GED
62 satisfied customers
#5 IS MISFIRING SO I CHANGED MY PLUGS..MISS..NEXT MORNING IT..missfire
#5 IS MISFIRING SO I CHANGED MY PLUGS ,AND IT STOPPED THE MISS UNTIL THE NEXT MORNING IT STARTED ALL OVER AGAIN ,SO I RAN THE CODES SANE THING #% MISSFIRE… read more
GM Tech (Cam)
GM Tech (Cam)
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Vocational, Technical or Trade Scho
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2002 Trailblazer: coil pack #1, fuel filter, spark plugs..highway
I have replaced coil pack #1, fuel filter, spark plugs, cam position sensor, cam actuator, map sensor, air filter and still get trouble code P0014. I am still getting the same problem, when I'm drivin… read more
AZ_HUNTER
AZ_HUNTER
GM Technician
High School or GED
401 satisfied customers
misfire..coil pack on #6..but still have the same problem..injector
my "service engine soon" light started flashing.. i plugged it in, it said misfire on #6...so i changed all the plugs, wires, and coil pack on #6..but still have the same problem..now what? injector o… read more
lexpert
lexpert
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Vocational, Technical or Trade Scho
2,100 satisfied customers
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Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,756 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

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15 years GM master tech

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Tim's Auto Repair

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Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

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ASE Master Certification. GM World Class Certification

John

John

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Don - Mo Lurch

Don - Mo Lurch

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Ron Z.

Ron Z.

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18+yrs experience. State Inspector and Chevy Diagnostics

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