NO gasses on 1995 GMC Suburban K2500 7.4L

Asked by GuruJJ3VS Aug 12, 2020 at 12:28 AM about the 1995 GMC Suburban K2500 4WD

Question type: Maintenance & Repair

I passed smog but my NO was borderline
high....took off EGR to clean it but it was
really clean.... thinking maybe there is a
blockage in one of the passages....how
should I go about testing the EGR valve
and system in general?

2 Answers

F_O_R answered 4 years ago

HIgh NOx emissions can be from the engine running lean. I will post a link to a guide.

Mark helpful

F_O_R answered 4 years ago

Link. https://www.smogtips.com/failed-high-NO-nitric- oxide.cfm#:~:text=Combustion%20temperatures%20increase%20causing%20high,2.

Mark helpful

Your Answer:

Related Questions

  • NO gasses on 1995 GMC Suburban K2500 7.4L 2 Answers

    I passed smog but my NO was borderline high....took off EGR to clean it but it was really clean.... thinking maybe there is a blockage in one of the passages....how should I go about testing the E...

    1995 GMC Suburban K2500 4WD

    -

    Maintenance & Repair

  • 1995 GMC Suburban K2500 won't start 1 Answer

    I have a 1995 GMC Suburban K2500 with a 5.7 engine. I have a new battery. New starter. New ignition wiring harness. All lights,radio, etc. works but wont start. It is getting 12.4 v at the starter o...

    1995 GMC Suburban K2500 4WD

    -

    Maintenance & Repair

  • No spark on 1997 GMC 2500 Suburban 454 1 Answer

    No spark on 1997 GMC 2500 Suburban 454 cubic inch engine

    1997 GMC Suburban K2500 4WD

    -

    Maintenance & Repair

  • 1995 5.7 GMC SUBURBAN K1500 Won't start. 2 Answers

    95 Suburban sputters/loses power, backfires Loud, now won't start. I have a 1995 gmc suburban 5.7 350 v8 k1500, bought it in 2001 and ran perfectly fine with regular tune ups and maintenance , never...

    1995 GMC Suburban K1500 4WD

    -

    Maintenance & Repair

  • 1999 suburban k2500 1 Answer

    Front parking lights and rear tail lights do not work have no problems with brake lights, turn signals front or back, reverse lights and all dash lights work. Just no tail lights and parking lights...

    1999 GMC Suburban K2500 4WD

    -

    Maintenance & Repair

Shortcuts

Search GMC Suburban Questions

CarGurus Experts

  • #1
    ShadetreeMech
    Reputation
    1,110
  • #2
    Larry Thibert
    Reputation
    970
  • #3
    DanTheMan5160
    Reputation
    660
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Suburban
13 Great Deals out of 584 listings starting at $11,988
Used GMC Yukon
12 Great Deals out of 918 listings starting at $4,555
Used GMC Sierra 1500
147 Great Deals out of 6,591 listings starting at $3,975
Used Chevrolet Tahoe
12 Great Deals out of 889 listings starting at $12,900

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.