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06 Silverado losing speed on high way and flashing check engine light

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Old Jul 18, 2017 | 9:28 AM
  #1  
Chris french's Avatar
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Default 06 Silverado losing speed on high way and flashing check engine light

when I'm on the high way and most of the time only when going up hill there will be a real high squeak, then lose of engine power " not complete lose", and the check engine light will start flashing. The codes it through were
p0101 MAF sensor
p0300 random misfire
p0420 catalytic something
p0305 misfire cylinder 5
I changed the plugs and wires last August. So any suggestions on what I should try first?
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Old Jul 18, 2017 | 12:34 PM
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kevinkpk's Avatar
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From: kevinkpk
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My guess is a plugged cat.
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