Diagnostic Aids

If DTC B1982 or B1983 are set as current, DTC B0532 will not set. Instead a Class 2 message will be sent to PCM that percentage of ignition 1 voltage is too low. Check for short to ground in Purple or Purple/White wire between PZM and fuel level sender. If circuit is okay, and DTC B0532 is set as current, replace PZM. See REMOVAL & INSTALLATION in BODY CONTROL MODULES - ELDORADO article. If circuit is okay, and DTC B0532 is set as history, replace fuel level sensor. See FUEL LEVEL SENSOR  under REMOVAL & INSTALLATION.

Fig 1: Identifying Continuously Variable Road Sensing Suspension (CVRSS) Module, Platform Zone Module (PZM), Instrument Panel Cluster (IPC) & Radio Interface Module (RIM) Connectors & Terminals

Courtesy of GENERAL MOTORS CORP.