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Home >> GMC >> 1988 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> Emissions >> Emission Component Identification >> Operation >> Computer Command Control (CCC) Operation

Computer Command Control (CCC) Operation

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CCC is an electronically controlled exhaust emission system. It monitors several engine/vehicle functions and controls various operations, including automatic transmission torque converter clutch (TCC), downshift control and manual transmission shift light. CCC system aids in control of exhaust emissions while maintaining good fuel economy and driveability.