Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 1992 Oldsmobile Bravada, 1992 GMC Vandura Special, 1992 GMC Vandura, 1992 GMC Value Van, and 1992 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.

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 (4.3L C, G, K & P Series W/4L80-E Trans.) EGR System Error

Fig 2: Code 32 Flow Chart (4.3L C, G, K & P Series W/4L80-E Trans.) EGR System Error

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

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

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 (2.5L, 4.3L Non-Turbo & S & T 5.0L & 5.7L) EGR System Error

Fig 2: Code 32 Schematic (2.8L, 4.3L S & T Series & 7.4L) EGR System Error

Fig 3: Code 32 Flow Chart (All W/O 4L80-E Trans. Except 3.1L & 4.3L Turbo) EGR System Error

Vacuum switch in the EGR solenoid is not used. If EGR valve sticks open, a rough idle will result. If EGR solenoid vent filter becomes plugged, EGR valve will remain open or close slowly. An inoperative check valve in the ported vacuum supply line will result in faulty EGR system operation.

Fig 1: Code 32 Schematic (4.3L) EGR System Error

Fig 2: Code 32 Flow Chart (4.3L) EGR System Error