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Cobalt LS, 4D Sedan, Automatic
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Automatic Trans
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Automatic Transmission - 4T45-E - Symptom Troubleshooting And Diagnosis
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Third and Fourth Gears Only
Third and Fourth Gears Only
Checks
Causes
2-3 Shift Solenoid Valve(305)
Stuck ON
Solenoid is plugged
Electrical malfunction
1-2 and 2-3 Shift Valves
Both are stuck in an upshifted position