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 MANUALSCHEVROLET2013SILVERADO 1500 HYBRID, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS/FUEL - HYBRID (HP2) 6.0L (LZ1) - DTC P0420 TO DTC P3449 AND DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC INFORMATION AND PROCEDURESDTC P2534 (FUEL PUMP CONTROL MODULE)COMPONENT TESTING
2013 Chevrolet Silverado 1500 Hybrid, RWD
Component Testing
2013 Chevrolet Silverado 1500 Hybrid, RWDSECTION Component Testing
Relay Test
- Ignition OFF, disconnect the Run/Crank relay.
- Test for 60-180 ohms between terminals 85 and 86.
- If the resistance is not within the specified range, replace the relay.
- Test for infinite resistance between the following terminals:
- 30 and 86
- 30 and 87
- 30 and 85
- 85 and 87
- If less than infinite resistance, replace the Run/Crank relay.
- Install a 20-amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2.0 ohms between terminals 30 and 87.
- If greater than 2.0 ohms, replace the Run/Crank relay.
RENDER: 1.0x
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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.