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Uses more gas with AC on

Tiny
BROBB56
  • MEMBER
  • 2003 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 112,000 MILES
We have a 2003 Chevy Blazer. We just replaced the fuel pump. Now when the AC is on it uses gas like crazy. When AC is off it is normal. It never did this until fuel pump was replaced. What could it be?
Thursday, August 4th, 2011 AT 12:53 PM

2 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,471 POSTS
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Sunday, August 7th, 2011 AT 3:03 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
It is normal for the fuel consumption to increase with the use of the AC. The AC compressor places an additional load on the engine.
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Saturday, October 8th, 2011 AT 1:36 AM

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