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 C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1416 (OBJECT DETECTION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESPARKING ASSIST SYSTEM MALFUNCTIONCIRCUIT/SYSTEM TESTING
2006 Chevrolet Suburban C1500, 5.3 Z
Circuit/System Testing
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Park Assist Disable Switch Circuit Malfunction
- Ignition OFF, disconnect the harness connector I/P multifunction switch.
- Test for less than 10 ohms between the ground circuit terminal 3 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition ON, verify the scan tool Park Assist Switch parameter is Inactive.
- If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the object alarm module.
- Install a 3A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool Park Assist Switch parameter is Active.
- If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the object alarm module.
- If all circuits test normal, test or replace the I/P multifunction switch.
Park Assist Disable LED Circuit Malfunction
- Ignition OFF, disconnect the harness connector I/P multifunction switch.
- Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 6 and ground:
- If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
- Ignition OFF, connect the harness connector at the I/P multifunction switch assembly. Disconnect the X2 harness connector at the object alarm module.
- Ignition ON, verify the park assist disable LED is not illuminate.
- If the LED is illuminated, test the control circuit for a short to ground. If the circuit tests normal, test or replace the I/P multifunction switch.
- Install a 10A fused jumper wire between the control circuit terminal 3 and ground. Verify the park assist disable LED is illuminated.
- If the LED is not illuminated, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the I/P multifunction switch.
- If all circuits test normal, replace the object alarm module.
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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.