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Home >> Chevrolet >> 2016 >> Suburban 3500 HD LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 127 (Shift Lock Control System) >> Diagnostic Information and Procedures >> Transmission Control Lever Malfunction >> Component Testing

Component Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Yukon XL, 2015 GMC Yukon, 2015 Chevrolet Tahoe, 2015 Chevrolet Suburban, and 2015 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at M7 Transmission Shift Lock Control Solenoid Actuator.
  2. Install a 3 A fused jumper wire between the control terminal A and 12 V. Momentarily install a jumper wire between the ground terminal B and ground.
  3. Verify the M7 Transmission Shift Lock Control Solenoid Actuator turns on and off/clicks, etc.
    • If the M7 Transmission Shift Lock Control Solenoid Actuator does not turn on and off/clicks, etc 

      Replace the M7 Transmission Shift Lock Control Solenoid Actuator.

    • If the M7 Transmission Shift Lock Control Solenoid Actuator does turn on and off/clicks, etc 
  4. All OK.
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