2003 Chevy Avalanche 4L60-E Transmission Error Codes P0758, P0756, P0740 - Solenoid Issues and Diagnosis

Model: 2003 Chevy Avalanche Fault Code: P0740 Posted: 2018-05-14 18:38

I'm experiencing three distinct transmission error codes on my 2003 Chevrolet Avalanche with the 4L60-E transmission: - P0758: Automatic Transmission 2-3 Shift Solenoid Circuit Malfunction - P0756: 2-3 Shift Solenoid - No Second or Third Gear - P0740: TCC (Torque Converter Clutch) Solenoid Circuit Malfunction The transmission fluid level appears normal, there is no burnt odor, and I don't observe any metal shavings. The wiring harness connections seem secure and properly attached. I'm wondering whether replacing the B solenoid would be a viable solution. Any technical advice or recommended troubleshooting steps for these specific error codes would be greatly appreciated.