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Posted

Shop Installed a new fuel pump in my 1999 4.3 Silverado, everything is the same as before but immediately after it was installed gas mileage went down. 

Any ideas? Sometimes a rough start sometimes not. 

Posted

I can't answer for the mileage issue but I can say hang on to that truck long as you can .  Good models; and 4.3 is a good engine.  I got 484k miles on one before I sold it.

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