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Home >> GMC >> 1991 >> Forward Control 7.4 N >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Gasoline >> Trouble Code Charts >> Code 32, EGR System Error (All W/4L80-E Trans. Except 4.3L) >> Diagnostic Aids

Diagnostic Aids

Prior to replacing PCM, check resistance of all PCM-controlled solenoids and relays. Replace any with a resistance value less than 20 ohms.

Fig 1: Code 32 Schematic (All Engines W/4L80-E Trans. Except 4.3L) EGR System Error
G91D13782
Fig 2: Code 32 Flow Chart (All Engines W/4L80-E Trans. Except 4.3L) EGR System Error
G91C13781
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