i have a 2010 chevy cobalt 2.2L w/ codes P0700(TCM) P0751 & P0752 Shift solen

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i have a 2010 chevy cobalt 2.2L & the codes i got r P0700(TCM) P0751 & P0752 Shift solenoid A. what should i get fixed? when driving on the interstate my rpms stay at 2800-3500? it feels like it doesnt shift into 4th gear. i do think 1 & 2 work, (maybe 3/maybe not 3) but not 4th gear. How do u check the tcm?

How long has your 2010 Chevrolet Cobalt had this problem?

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