How to fix a Chevy or GMC P0700 Code: Malfunction with Transmission Control Module (TCM). Some scan tools also give a Transmission Control System (MIL Request)

Chevy GMC P0700 Possible Causes
Low or dirty transmission fluid
Short or open in the wiring
Faulty TCM
Faulty Transmission shift solenoid
Faulty Speed Sensor
Weak Alternator

Related Codes:
P0747: "Pressure Control Solenoid 'A' Stuck On
U0100: Lost Communication with Engine Control Module: ECM harness is open or shorted
ECM circuit poor electrical connection

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