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Re: gas economy
regular oil changes, air filter changes, and tune ups (plugs, fuel filter, etc), proper tire air pressure and rotations, make the most difference.
i have a 5 speed 4.3 blazer, and doing all of this and driving/shifting consciously, i get 20-24 mpg's (city and hwy, with the a/c running). i have 145k miles on mine and the only "major" work i've done was the lower intake manifold gasket (and cleaning of all of the parts). good maintenance can keep these trucks running well for a long time.
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2001 Chevy Blazer
4.3L 5 speed manual
Alpine deck, Type R 12in. sub.
145k miles
1997 Pontiac Sunfire
2.2L automatic trans
146k miles
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