I have a 99 half ton Chevy pickup. Not Silverado. I had a cat delete exhaust put on and I only get about 8 MPG.

Asked by Apr 11, 2017 at 09:32 PM about the 1999 Chevrolet C/K 1500 LS Extended Cab 4WD

Question type: Maintenance & Repair

3 Answers

32,635

HUMMMM.BELIEVE IT OR NOT YOU NEED BACK PRESSURE EVEN RACE CARS ARE USING THEM NOW...OK..YOU DID NOT SAY WHAT SIZE PIPES WERE STOCK..WHAT SIZE DID YOU PUT BACK INTO IT??/ 1 OR 2 CATS/MUFFLERS..THE NEW BRAND NAME OF THE MUFFLERS...IMPORTANT ALSO MOVING ON DID/HAS THE AIR INTAKE BEEN UPGRADED TO MATCH THE SUSPOSED EXTRA EXHAUST FLOW???? AN EXHAUST CROSS OVER??1 OR 2 TAIL PIPES/EXTENSIONS????

67,905

Has nothing to do with backpressure.......you removed the O2 sensors didn't you?

upstream O2 sensors remain downstream were tuned out in the computer

Your Answer:

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 10 nationwide C/K 1500 listings and the tools to find you a great deal.

Postal Code:

Chevrolet C/K 1500 Experts

  • #1
    Andrew Olsen
    Reputation
    4,560
  • #2
    John Saffrahn
    Reputation
    2,770
  • #3
    Rowefast
    Reputation
    2,460
View All

Related Models For Sale

Used Chevrolet Silverado 1500
106 Great Deals out of 11,112 listings starting at $4,950
Used GMC Sierra 1500
87 Great Deals out of 10,384 listings starting at $4,995
Used Ford F-150
129 Great Deals out of 11,395 listings starting at $1,995
Used Dodge Ram 1500
30 Great Deals out of 523 listings starting at $4,300
Used Chevrolet Silverado 2500HD
9 Great Deals out of 1,130 listings starting at $4,495
Used Chevrolet Tahoe
11 Great Deals out of 782 listings starting at $5,900
Used Chevrolet Camaro
10 Great Deals out of 932 listings starting at $11,500
Used Toyota Tacoma
15 Great Deals out of 1,757 listings starting at $6,413
Used Chevrolet S-10
4 listings

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.