2009 Silverado has FMS (fuel management system) and I have problems.

2009 CHEVROLET SILVERADO
21,000 MILES
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BUBOGGIE
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Back in March of this year with 15,500 miles the truck stopped running just shut off. Towed it to the dealer and was told the next day that it had 8 bent valves. They put a new engine in under warranty. Now with 21,000 miles I have what sounds like lifters tapping and the truck seems sluggish and I'm getting 15 to 17 mpg where I was getting 20 to 22 with the old engine.
Do you have any information concerning this problem?
Thanks, Charles
Oct 6, 2011 at 12:09 AM
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ASEMASTER6371
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what motor??

Roy
Oct 6, 2011 at 12:24 AM
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BUBOGGIE
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5.3
Oct 6, 2011 at 12:44 AM
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ASEMASTER6371
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5.3 had lifter issues since they were put in service. they changed the weight of the oil to keep them quiet. I dont know about the new ones. If they put in a gm motor, it should be ok. some of gm motors are made in mexico and they seem to be the issues.

anyway, it is under warranty and with the issues you have had, i would go back to the dealer and make them give you an extended warranty on the motor like 10yr 100k.

Roy
Oct 6, 2011 at 12:50 AM