Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1999 Chevrolet Cutaway 7.4 JFACTORY OEM SERVICE PROCEDURE
Fuel Pump
FUEL PUMP PERFORMANCE
| Application | psi (kg/cm2 ) | ||||
|---|---|---|---|---|---|
| 1.6L | (1) 36-43 (2.5-3.0) | ||||
| 2.0L | (2) | ||||
| 2.2L & 3.4L | 41-47 (2.9-3.3) | ||||
| 4.3L, 5.0L & 5.7L | 60-66 (4.2-4.6) | ||||
| 4.8L, 5.3L, 6.0L & 7.4L | 55-62 (4.0-4.4) | ||||
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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