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.

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HOMESERVICE MANUALSCHEVROLET2002CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 8.1 GREPAIR AND DIAGNOSISENGINE PERFORMANCESPECIFICATIONSENGINE CONTROLS - SERVICE & ADJUSTMENT SPECIFICATIONSFUEL SYSTEMFUEL PUMP

2002 Chevrolet Chevy Express G3500, Van Passenger Extended, 8.1 G

Fuel Pump

2002 Chevrolet Chevy Express G3500, Van Passenger Extended, 8.1 GSECTION Fuel Pump

FUEL PUMP PERFORMANCE

Application

psi (kPa)

2.0L & 2.5L

⁽¹⁾ 36-43 (248.2-296.5)

2.2L

Sonoma & S10 Pickup

41-47 (282.7-324.1)

VUE

50-60 (344.8-413.7)

3.0L

50-60 (344.8-413.7)

3.4L

52-59 (358.5-406.8)

4.2L

48-52 (331.0-358.5)

4.3L

Astro, Safari, Sierra & Silverado

55-62 (379.2-427.5)

Blazer, Express, Jimmy Canadian, Savana, Sonoma & S10

60-66 (413.7-455.1)

4.8L, 5.3L & 6.0L

Ethanol (VIN "Z")

48-54 (331.0-372.3)

Gasoline (VIN "V", "T" Or "U")

55-62 (379.2-427.5)

5.0L

59-66 (406.8-455.1)

5.7L

CNG Engine

130-220 (896.4-1516.9)

Gasoline Engine

59-66 (406.8-455.1)

6.5L

Non-Turbo Engine

⁽²⁾ 1500 (10,342.5)

Turbo Engine

⁽²⁾ 1700 (11,721.5)

6.6L

⁽³⁾ 23,206 (160,005.4)

8.1L

55-62 (379.2-427.5)

⁽¹⁾	Pressure should maintain at least 25 psi (172.4 kPa) for one minute after fuel pump is turned off.

⁽²⁾	Measured on diesel fuel injection nozzle side.

⁽³⁾	Measured on fuel injection pump high pressure side.

RENDER: 1.0x

NO RELATED

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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.