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 MANUALSCHEVROLET1999CHEVY EXPRESS G1500, VAN CARGO, 5.7 RREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - TESTS W/CODES - DTC P0135-P0204DTC P0174DTC P0174: FUEL TRIM SYSTEM LEAN-BANK 2 (3.0L "V" BODY)DIAGNOSTIC AIDS
1999 Chevrolet Chevy Express G1500, Van Cargo, 5.7 R
Diagnostic Aids
1999 Chevrolet Chevy Express G1500, Van Cargo, 5.7 RSECTION Diagnostic Aids
If DTC P0174 cannot be duplicated, vehicle must have run out of fuel. Check for low fuel pressure, causing lean condition. Check for water contamination. See appropriate TROUBLE SHOOTING - NO CODES article for diagnosis.
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.