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, EGR System Error (4.3L G Series & 4.3L C,K, & M Series; All Non-Cal. W/ 4L60E Trans. Exc. 4.3L CPI)

Fig 2: CODE 32, Schematic, EGR System Error (4.3L C, G, K & P Series W/ 4L80E Trans.)

Fig 3: CODE 32, Flowchart, EGR System Error (4.3L G Series; 4.3L C,K & M Series (All Non-Cal.) & 4.3L C,G,K & P Series W/ 4L80E Trans.)