GM Service Manual Online
For 1990-2009 cars only

Parameter

Display

Description

CURRENT DTC

BXXXX

The letter B, followed by the number of each cycle DTC and its description stored by the SDM in memory.

IGNITION VOLTS

XX.XX

Voltage between SDM terminals A10 (Ignition 1) and A6 (Ground), 9 to 16 volts for SDM operation.

ADS A/D

XX

Voltage for the energy reserve, approximately 20 volts.

PROM ID

XXXX

Programmable ROM identification number.

CALIBRATION ID

XXXX

SDM calibration identification number.

JULIAN DATE OF BUILD

XXX

Day of the year SDM was built, 0-365

YEAR MODEL BUILT

XXXX

Year SDM was built, use with Julian date.

8 DIGIT PART NUMBER

XXXXXXXX

SDM production or service part number.

COMPONENT SERIAL #

XXXX

First half of the SDMs serial number.

COMPONENT SERIAL #

XXXX

Second half of the SDMs serial number.

DR BELT STATUS

XXXXXXX

Current status of drivers seat belt switch. Buckled or unbuckled.

HISTORY DTCS

BXXXX

The letter B, followed by the number of each history DTC stored by the SDM.