Uses more gas with AC on

2003 CHEVROLET BLAZER
112,000 MILES • 6 CYL • 4WD • AUTOMATIC
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BROBB56
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  • 3 POSTS
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?
Aug 4, 2011 at 5:53 AM
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STEVE W.
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  • 15,367 POSTS
See other post
Aug 6, 2011 at 8:03 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 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.
Oct 7, 2011 at 6:36 PM
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