Left-Side AUTO

Indicator light will be on when ECM commands 3rd gear. Light should only be on in 3rd or 4th gear.

Indicator light will be on when BCM requests ECM to engage A/C compressor clutch.

Fig 1: ECM (PCM) System Diag. Flow Chart (All W/O CRT) (1 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: ECM (PCM) System Diag. Flow Chart (All W/O CRT) (2 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 3: BCM System Diag. Flow Chart (All W/O CRT) (1 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 4: BCM System Diag. Flow Chart (All W/O CRT) (2 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 5: ECM (PCM) System Diag. Flow Chart (All W/CRT) (1 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 6: ECM (PCM) System Diag. Flow Chart (All W/CRT) (2 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 7: BCM System Diag. Flow Chart (All W/CRT) (1 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 8: BCM System Diag. Flow Chart (All W/CRT) (2 of 2)

Courtesy of GENERAL MOTORS CORP.