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 MANUALSCHEVROLET2025TRAILBLAZER ACTIV, FWDREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSSHIFT LOCK CONTROL SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESTRANSMISSION CONTROL LEVER MALFUNCTIONCOMPONENT TESTING
2025 Chevrolet Trailblazer ACTIV, FWD
Component Testing
2025 Chevrolet Trailblazer ACTIV, FWDSECTION Component Testing
- Ignition/Vehicle - Off
- Disconnect the electrical connector: S3 Transmission Shift Lever
- Connect a 3 A fused jumper wire between the test points: Control terminal 1 & 12 V
- Momentarily connect a jumper wire between the test points: Ground terminal 4 & Ground
Verify the component produces a clicking sound: M7 Transmission Shift Lock Control Solenoid Actuator
- If the component does not produce a sound
Replace the component: S3 Transmission Shift Lever
- Go to next step: If the component produces a sound
- If the component does not produce a sound
- All OK.
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.