I have an 04 GMC Envoy 6 cylinder 4.2. The service engine soon light came on this morning and was running a little rough. We ran around a little bit before stopping at Auto Zone, they hooked up there tester and said you have a misfire in cylinder 4. They said it could be spark plugs or maybe a clogged injector. I bought some spark plugs and went home. I shut the car off and restarted a couple of hours later and the service engine light did not come back on and it seemed to run fine. Any ideas?

Asked by Jun 08, 2014 at 07:09 PM about the 2004 GMC Envoy XL SLT 4WD

Question type: Maintenance & Repair

2 Answers

113,265

Could have been some water in your gas if you did not change anything. But most times it's the plugs or plug wires(boots)or coils that cause this code.

1 of 1 people found this helpful.
69,385

If you have over 100,000 miles on it you're due for a tune up. Change the spark plugs and wires (or boots on coil overs). If it's never been tuned up yet you could have a spark plug or wire (boot) that's beginning to fail. HTH. -Jim

2 of 2 people found this helpful.

Your Answer

GMC Envoy XL Experts

  • #1
    mhgcards
    Reputation
    190
  • #2
    John Leone
    Reputation
    140
  • #3
    COMETGUY61
    Reputation
    110
View All

Related Models For Sale

Used GMC Envoy
64 Great Deals out of 2,204 listings starting at $1,500
Used GMC Yukon XL
220 Great Deals out of 13,171 listings starting at $1,495
Used Chevrolet Tahoe
642 Great Deals out of 36,956 listings starting at $1,800
Used GMC Yukon
419 Great Deals out of 21,028 listings starting at $1,495
Used Chevrolet Suburban
294 Great Deals out of 20,596 listings starting at $1,000
Used GMC Envoy XUV
134 listings starting at $2,995
Used Ford Explorer
797 Great Deals out of 63,363 listings starting at $1,495
Used Chevrolet TrailBlazer EXT
17 Great Deals out of 1,017 listings starting at $495
Used Chevrolet Equinox
1,037 Great Deals out of 80,913 listings starting at $1,750
Used Chevrolet TrailBlazer
100 Great Deals out of 4,696 listings starting at $1,000
Used Ford Expedition
393 Great Deals out of 21,855 listings starting at $1,500
Used Jeep Grand Cherokee
886 Great Deals out of 71,728 listings starting at $995
Used Dodge Durango
279 Great Deals out of 20,488 listings starting at $999

Used Cars For Sale

2006 GMC Envoy XL SLT 4WD For Sale
20 listings starting at $3,895
2005 GMC Envoy XL SLT 4WD For Sale
3 Great Deals out of 38 listings starting at $895
2002 GMC Envoy XL SLT 4WD For Sale
11 listings starting at $2,990

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.