Question about 2003 Chevrolet Avalanche

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Loss of power after 20-30 miles on my '04 chevy 5.3

After driving a few miles I have a significant loss of power. I have changed the plugs (looked good but changed anyway), serviced the air fiter (KN), cleaned the throttle body and MAF sensor. All with no help!!

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Sounds like it could be the fuel pump. I had a simular problem with an astro van. does it restart with full power after you shut it off and wait 15-20 minnutes? if if does i would have the fuel pump pressures checked.

Posted on Jan 27, 2009

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