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Obviously there are varying factors that can change the milage between vehicles, including driver's habits, the vehicle's current state of repair (ie: has the vehicle been tuned up recently? Are the dashboard lights showing a SES light?), and drivetrain configuration (4wd, 2wd, Awd)but a reasonable breakdown for the 4.3 Vortec motors will be somewhere along the lines of this.... 2wd: 15-17 mpg City, 18-21 Highway 4wd/Awd (Awd only applies to the Olds Bravada for the '98 model year): 14-16 mpg City, 17-20 Highway

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16y ago
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Q: What is the expected gas mileage for a 1998 Chevy blazer v-6 vortec?
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