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Symptom Tests: Notes

NOTE: For connector terminal identification, see Fig 1 and Fig 2 . For terminal wire color identification, see WIRING DIAGRAMS . For speedometer testing, see Vehicle Speed Sensor (VSS) related codes in TESTS W/CODES article in ENGINE PERFORMANCE section.
CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION section before disconnecting battery.
Fig 1: Identifying Connector C1 Terminals
G97G28783Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Connector C2 Terminals
G97H28784Courtesy of GENERAL MOTORS CORP.