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MPFI spider upgrade-worth it?

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Old Aug 8, 2025 | 05:09 PM
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Originally Posted by GeorgeLG
My 2006 Sierra 1500 2wd gets 16

George
Mine got 17 city and 19 highway. It didn't have A/C though.............
 
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Old Aug 28, 2025 | 01:03 AM
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What was the reason for replacing the clutch fan?
 
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Old Aug 28, 2025 | 08:32 AM
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Originally Posted by RegSo
What was the reason for replacing the clutch fan?
I read that a faulty clutch fan can cause excessive drag on the engine and reduce fuel mileage. So I replaced it. In hindsight it may not have been necessary, I'm not certain the clutch fan was faulty.
 
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