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 MANUALSCHEVROLET2006SUBURBAN K1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1061 (POWER TAKE-OFF)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P253DCOMPONENT TESTING
2006 Chevrolet Suburban K1500, 5.3 Z
Component Testing
2006 Chevrolet Suburban K1500, 5.3 ZSECTION Component Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
PTO Relay (If supported by the PTO upfitter wiring)
- Ignition OFF, disconnect the PTO relay.
- Test for approximately 50-200 ohms of resistance between terminals H and J on the upfitter wiring side of the upfitter PTO connector.
- If the resistance is not within the specified range, replace the relay.
- Test for infinite resistance between the following terminals:
- F and J
- F and H
- F and K
- K and J
- If less than infinite resistance, replace the PTO relay.
- Install a 15-amp fused jumper wire between relay terminal J and 12 volts. Install a jumper wire between relay terminal H and ground. Test for less than 2.0 ohms of resistance between the relay switch terminals.
- If greater than 2.0 ohms, replace the PTO relay.
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.