04 chevy trailblazer ls 4.2 engine

Asked by Apr 24, 2017 at 05:15 PM about the 2004 Chevrolet TrailBlazer LS 4WD

Question type: Maintenance & Repair

I just replaced emissions coil and plugs .but I can't reset
check engine light.and truck is still running rough.is there
anyway I can reset with out computer?

1 Answer


If it is still running rough a reset won't fix it, the best way is to have it reset with a scan tool, your right in the gray area where if you disconnect the battery you may loose the factory presets so,none of your accessories will work and that will cost at least a hundred bucks to have it reflashed.

Your Answer

Chevrolet TrailBlazer Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Tahoe
8 Great Deals out of 724 listings starting at $4,995
Used Jeep Grand Cherokee
89 Great Deals out of 2,802 listings starting at $1,500
Used GMC Envoy
30 listings starting at $3,990
Used Chevrolet Silverado 1500
186 Great Deals out of 11,109 listings starting at $999
Used Ford Explorer
51 Great Deals out of 1,458 listings starting at $2,800
Used Chevrolet Impala
131 Great Deals out of 1,053 listings starting at $2,600
Used Dodge Durango
122 Great Deals out of 1,057 listings starting at $2,998
Used Chevrolet Blazer
21 listings starting at $3,998
Used Chevrolet Equinox
182 Great Deals out of 5,895 listings starting at $1,500
Used Ford F-150
526 Great Deals out of 10,140 listings starting at $1,400

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.