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1998 GMC Sierra 1500 4.3L Automatic, I have two codes, P0740 and P1860, and poor take off with TAC and speedometer not working need help. What could the problem be?

Vehicle: 1998 GMC Sierra 1500 4.3L Automatic

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P0740 TCC enable solenoid circuit electrical

P1860 TCC PWM solenoid circuit electrical

Check for a short, the TCC is a fused protected solenoid, in the engine fuse relay box listed as TRANS fuse # 20 which is a 10 amp fuse replace if open. This also power the instrument panel.
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P0740 GMC Code - Torque Converter Clutch Malfunction
Read more: https://www.autocodes.com/p0740_gmc.html

P1860 GMC Code - TCC PWM Solenoid Circuit Electrical
Read more: https://www.autocodes.com/p1860_gmc.html

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