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 DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSELECTRICAL COMPONENT LOCATOR AND WIRING HARNESS ROUTING VIEWSCOMPONENT LOCATORPOWERTRAIN COMPONENT VIEWSTRANSMISSION COMPONENTS (M3F)
2025 Chevrolet Trailblazer ACTIV, FWD
Transmission Components (M3F)
2025 Chevrolet Trailblazer ACTIV, FWDSECTION Transmission Components (M3F)
| Items |
|---|
| 1. B14A Transmission Output Shaft Speed Sensor B14A Transmission Output Shaft Speed Sensor (M3F) |
| 2. B303 Transmission Range Sensor B303 Transmission Range Sensor |
| 3. B280 Automatic Transmission Accumulator Solenoid Valve (M3F) B280 Automatic Transmission Accumulator Solenoid Valve (M3F) |
| 4. Q77B Transmission Control Solenoid Valve 2 Q77B Transmission Control Solenoid Valve 2 (M3F) |
| 5. Q77A Transmission Control Solenoid Valve 1 Q77A Transmission Control Solenoid Valve 1 (M3F) |
| 6. B14E Transmission Input/Intermediate Shaft Speed Sensor (M3F) B14E Transmission Input/Intermediate Shaft Speed Sensor (M3F) |
| 7. Q77F Transmission Control Solenoid Valve 6 Q77F Transmission Control Solenoid Valve 6 (M3F) |
| 8. Q77E Transmission Control Solenoid Valve 5 Q77E Transmission Control Solenoid Valve 5 (M3F) |
| 9. B13 Transmission Fluid Temperature Sensor B13 Transmission Fluid Temperature Sensor (M3F) |
| 10. Q77K Transmission Control Solenoid Valve 10 (M3F) Q77K Transmission Control Solenoid Valve 10 (M3F) |
| 11. Q77G Transmission Control Solenoid Valve 7 (M3F) Q77G Transmission Control Solenoid Valve 7 (M3F) |
| 12. Q77H Transmission Control Solenoid Valve 8 (M3F) Q77H Transmission Control Solenoid Valve 8 (M3F) |
| 13. Q77J Transmission Control Solenoid Valve 9 (M3F) Q77J Transmission Control Solenoid Valve 9 (M3F) |
| 14. Q77D Transmission Control Solenoid Valve 4 Q77D Transmission Control Solenoid Valve 4 (M3F) |
| 15. Q77C Transmission Control Solenoid Valve 3 Q77C Transmission Control Solenoid Valve 3 (M3F) |
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.