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2001 Chevrolet Silverado gas mileage

Tiny
RBUTLER65
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
New plugs, wires, oxygen sensors (4) clean air filter. Muffler shop says doesn't think cats are problem. I'm down on power and gas mileage. 15 - 17 on highway now 13-12
Wednesday, May 28th, 2014 AT 3:11 PM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and check fuelpressure with a gauge first. Autoparts rent it. Also check for a vacuum leak. Vacuum 15" or below taken on intake then suspect clogged exhaust
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Wednesday, May 28th, 2014 AT 3:46 PM
Tiny
RBUTLER65
  • MEMBER
  • 3 POSTS
Thank you will check!
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Wednesday, May 28th, 2014 AT 10:26 PM
Tiny
RBUTLER65
  • MEMBER
  • 3 POSTS
2005 Chevy Tahoe v8 auto 160,000 miles. None of the gauges work. Not even tac or speedo. Then one will work then nothing then another will work then nothing. Any idea?
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Monday, June 16th, 2014 AT 2:16 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Dash may be going bad have a pro look at it not sure if scanning will tell or not. Bu tneeds to be checked. They can be rebuilt.
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Monday, June 16th, 2014 AT 3:13 PM
Tiny
RBUTLER65
  • MEMBER
  • 3 POSTS
Thank you so much. Will pass it on to my son.
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Monday, June 16th, 2014 AT 3:57 PM

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