97 Chevy truck backfires

Asked by GuruT31JL Jul 25, 2018 at 10:53 AM about the Chevrolet Silverado 1500

Question type: Maintenance & Repair

I have a 97 Chevy Silverado Z71 (5.7) that backfires
and pops through the exhaust when running
downhill and occasionally on a level road. I notice it
more while on cruise control.
It idles and accelerates fine. It only pops when it’s
decelerating gradually.

2 Answers

27,570

Maybe it's over fueling even when letting off the gas? How long since a tune-up? Might be other issues?

Your Answer:

CarGurus Experts

  • #1
    Rowefast
    Reputation
    10,510
  • #2
    John Carson
    Reputation
    9,680
  • #2
    Andrew Olsen
    Reputation
    9,680
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used GMC Sierra 1500
148 Great Deals out of 7,258 listings starting at $3,950
Used Ford F-150
321 Great Deals out of 14,968 listings starting at $1,712
Used Chevrolet Silverado 2500HD
16 Great Deals out of 1,285 listings starting at $8,995
Used RAM 1500
439 Great Deals out of 15,809 listings starting at $5,000
Used Toyota Tundra
35 Great Deals out of 1,184 listings starting at $8,500
Used Dodge RAM 1500
3 Great Deals out of 71 listings starting at $4,000
Used Chevrolet Tahoe
24 Great Deals out of 911 listings starting at $11,900
Used Toyota Tacoma
55 Great Deals out of 1,071 listings starting at $8,708
Used Chevrolet Colorado
25 Great Deals out of 1,525 listings starting at $6,800
Used GMC Sierra 2500HD
17 Great Deals out of 1,640 listings starting at $9,988
Used Ford F-250 Super Duty
24 Great Deals out of 1,204 listings starting at $7,995
Used RAM 2500
55 Great Deals out of 2,180 listings starting at $14,962
Used Chevrolet Camaro
16 Great Deals out of 307 listings starting at $10,500
Used Chevrolet Corvette
29 Great Deals out of 1,060 listings starting at $15,871
Used Dodge Charger
38 Great Deals out of 645 listings starting at $4,888

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.