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Home >> GMC >> 1993 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - 4L60-E >> Diagnostic Code Charts - (Passenger Vehicles) >> Code 79, Transmission Fluid OVERTEMP - 3.4L "F" Body, 4.3L & 5.7L >> Diagnostic Aids

Diagnostic Aids

See Code 59 chart to check transmission temperature sensor temperature-to-resistance values. Also, check transmission fluid level.

Fig 1: Code 79 - Transmission Temp. Flowchart (3.4L "F", 4.3L & 5.7L)
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