GM Service Manual Online
For 1990-2009 cars only

Headlamp Control Module Scan Tool Information Module ID Information

Module ID Information

Parameter

System State

Expected Value

Definition

Operating Conditions: Ignition ON

Base Model Part Number

--

Numeric

This displays the part number of the module hardware only.

Calibration Part Number

--

Numeric

This displays the part number of the module calibration.

Component Serial No. 13-16

--

Numeric

This is the third partition of the serial number.

End Model Part Number

--

Numeric

This displays the part number of the module with software.

Julian Date of Build

--

Numeric

This displays the day of the year the module was built.

Software Part Number

--

Numeric

This displays the part number of the software currently installed in the module.

Year Module Built

--

Numeric

This displays the year the module was built.