04 GMC Envoy misfire

Asked by Sara Jul 28, 2017 at 09:49 PM about the 2004 GMC Envoy 4 Dr SLT SUV

Question type: Maintenance & Repair

I recently purchased a 2004 GMC Envoy SLT with
the L6 engine. It was running beautifully absolutely
perfect until I started it one morning was idling fine
as soon as I turned on the front defrost it
immediately cut out and has been misfiring ever
since. Took it to AutoZone to run Diagnostics and it
through the code P0 300 multiple misfires
detected. I need to know what's causing the
misfires so I can fix it

4 Answers
11,215

FJ4072 answered 6 years ago

I believe you may have 2 different problems here. Problems with idle when AC/Defroster are turned on means the throttle body needs to be cleaned with fuses #10 and #28 removed. Battery was probably disconnected at some point prior to your purchase, very very common and a cheap fix. The P0300- did it recently rain?

14 people found this helpful.
Mark helpful
30

Guru16X13 answered 4 years ago

I HAVE GMC ENVOY DENALI 6CL..2005 AND SCANER SEE MISFIRE CILINDER 3...I CHANGE THE 6 SPARK..AND NOT DISAPEAR THE CODE AND FAIL MOTOR...YUO HAVE IDEA

3 people found this helpful.
Mark helpful
20

Stephen answered 3 years ago

I have random misfire code 300 I've replaced all coils all spark plugs and still have code 300 random

2 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 04 GMC Envoy misfire 4 Answers

    I recently purchased a 2004 GMC Envoy SLT with the L6 engine. It was running beautifully absolutely perfect until I started it one morning was idling fine as soon as I turned on the front defrost i...

    2004 GMC Envoy 4 Dr SLT SUV

    -

    Maintenance & Repair

  • 04 GMC Envoy misfire with no check engine light 3 Answers

    I have a 2004 GMC Envoy. I recently replaced the spark plugs with AC Delco iridium spark plugs. I can feel a misfire with engine at idle and while driving, but there is no check engine light. How do I...

    2004 GMC Envoy 4 Dr SLE SUV

    -

    Maintenance & Repair

  • GMC envoy 3 Answers

    Need help. My mom's car done a "Christine" move one her yesterday. It is a 2008 GMC envoy. Doors wouldn't unlock or open, all lights were on, air changed to full blast heat and she sure didn't nee...

    2008 GMC Envoy SLT-1 4WD

    -

    Maintenance & Repair

  • Misfire 2 Answers

    I have a 2004 gmc envoy slt and have replaced all 6 ignition coils but there is still a misfire

    2004 GMC Envoy 4 Dr SLT SUV

    -

    Maintenance & Repair

  • GMC Envoy 3 Answers

    I Have a 2002 GMC Envoy and one say I was driving when I felt the car pulling. I went from going 50mph to only being able to go 30 mph and now 20mph . 20mph is the fastest I can go now. I want to ...

    2002 GMC Envoy 4 Dr SLE 4WD SUV

    -

    Maintenance & Repair

Envoy

Looking for a Used Envoy in your area?

CarGurus has 3 nationwide Envoy listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search GMC Envoy Questions

CarGurus Experts

  • #1
    FJ4072
    Reputation
    2,680
  • #2
    NITROGLORY1
    Reputation
    1,730
  • #3
    Ria Gonzalez
    Reputation
    860
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Trailblazer
19 Great Deals out of 1,440 listings starting at $18,995
Used GMC Yukon
15 Great Deals out of 966 listings starting at $5,890
Used GMC Canyon
19 Great Deals out of 903 listings starting at $5,477
Used Ford Explorer
65 Great Deals out of 2,071 listings starting at $3,333
Used Chevrolet Tahoe
12 Great Deals out of 847 listings starting at $9,980
Used Jeep Grand Cherokee
124 Great Deals out of 3,505 listings starting at $4,950
Used Dodge Durango
51 Great Deals out of 1,870 listings starting at $6,987
Used GMC Sierra 1500
140 Great Deals out of 8,304 listings starting at $5,500
Used Chevrolet Equinox
96 Great Deals out of 3,330 listings starting at $1,695
Used Chevrolet Blazer
17 Great Deals out of 1,158 listings starting at $18,900
Used Toyota 4Runner
26 Great Deals out of 540 listings starting at $7,700

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.