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GMC
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1985
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Forward Control 7.4 W, Standard
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Tune-Up - 4.8L 6-CYL
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Testing
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Fuel Pump
Fuel Pump
All models use mechanical fuel pumps.
FUEL PUMP SPECIFICATIONS
Application
Pressure psi (kg/cm
2
)
Volume Pints (Liters)
All Models
4.5-6.0
1.0 in 30 sec.
**
(.3-.4).
(.5 in 30 sec.)