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HOMESERVICE MANUALSCHEVROLET2007SUBURBAN C1500, 5.3 0REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 668 (STEERING WHEEL & STEERING COLUMN)DIAGNOSTIC INFORMATION AND PROCEDURESSTEERING WHEEL CONTROLS INOPERATIVECIRCUIT/SYSTEM TESTING
2007 Chevrolet Suburban C1500, 5.3 0

Circuit/System Testing

2007 Chevrolet Suburban C1500, 5.3 0SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

It is recommended that Component Testing is performed before Circuit Testing when diagnosing steering wheel controls.

CAUTION: Refer to SIR Caution .
  1. Ignition OFF, disconnect the harness connector at the audio steering wheel control switches.
  2. Ignition ON, test for 12 volts between the voltage supply circuit and ground at the right switch harness connector.
    • If less than 10 volts, test the voltage supply circuit for a short to ground or an open/high resistance. If circuit tests normal, replace the BCM.
  3. Install a 3-amp fused jumper wire at the right switch supply voltage circuit. Toggle the jumper wire to the signal circuits at the left and the right harness connectors. Verify DTC B2815 sets.
    • If DTC B2815 does not set, test the signal circuits for a short to ground or an open/high resistance. If circuits test normal, replace the BCM.
  4. Remove the 3-amp fused jumper wire.
  5. Ignition OFF, test the jumper wire for less than 1.0 ohm of resistance between the left and right switch connectors.
    • If greater than 1.0 ohm, test the jumper wire circuit for an open/high resistance.
  6. If circuit tests normal, test or replace the switch.
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.