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 MANUALSGMC2013YUKON 4WD V8-6.0L HYBRIDREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCONTROL SOLENOID VALVE AND TRANSMISSION CONTROL MODULE ASSEMBLY OUTPUT SHAFT SPEED INPUT TEST
2013 GMC Yukon 4WD V8-6.0L Hybrid
Control Solenoid Valve and Transmission Control Module Assembly Output Shaft Speed Input Test
2013 GMC Yukon 4WD V8-6.0L HybridSECTION Control Solenoid Valve and Transmission Control Module Assembly Output Shaft Speed Input Test
Control Solenoid Valve and Transmission Control Module Assembly Output Shaft Speed Input Test
Special Tools
J 38522 - Variable Signal Generator
For equivalent regional tools, refer to Special Tools Tools and Equipment.
The purpose of this test is to provide a simulated output speed sensor signal to the control solenoid valve assembly.
Circuit/System Testing
1. Disconnect the wiring harness connector from the B14A Automatic Transmission Output Shaft Speed Sensor.
2. Connect the red lead of J 38522 - generator to the OSS voltage circuit terminal A and the black lead to the OSS signal circuit terminal B.
1. Adjust the J 38522 - generator Signal to 8 volts, the Frequency to 120 and the Percent Duty Cycle to 50.
2. Ignition ON, verify the Transmission OSS parameter display is 100-400 RPM.
If the reading is not within the specified range, test the output speed sensor circuits for a short to voltage, open/high resistance, or short to ground. If the circuits test normal, replace the Q8 control solenoid valve assembly.
If the reading is within the specified range, replace B14A Automatic Transmission Output Shaft Speed Sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Output Speed Sensor Replacement Output Speed Sensor Replacement for Automatic Transmission Output Shaft Speed Sensor.
* Control Module References Control Module References for Control Solenoid Valve Assembly replacement, programming and setup.
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.