GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module
Table 2: Driver Door Switch
Table 3: Passenger Door Switch
Table 4: HVAC Control Module

Body Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Ext. Trunk/Liftglass Rel. Sw.

Body Rear End

Active/Inactive

Inactive

Int. Trunk/Liftglass Sw.

Body Rear End

Active/Inactive

Inactive

Liftglass Release Cmd.

Body Rear End

On/Off

Off

LR Window Down Cmd.

Doors

On/Off

Off

LR Window Enable Cmd.

Doors

On/Off

Off

LR Window Up Cmd.

Doors

On/Off

Off

RR Window Down Cmd.

Doors

On/Off

Off

RR Window Enable Cmd.

Doors

On/Off

Off

RR Window Up Cmd.

Doors

On/Off

Off

Driver Door Switch

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Battery Voltage Signal

Data

Volts

12.8 V

Driver LF Window Switch

Inputs

Off/Up/Down/Express Down

Off

Driver LR Window Switch

Inputs

Off/Up/Down

Off

Driver RF Window Switch

Inputs

Off/Up/Down/Express Down

Off

Driver RR Window Switch

Inputs

Off/Up/Down

Off

Rear Window Sw. 12V Ref.

Data

Volts

12.8 V

VIN Learned

Data

Yes/No

Yes

Window Lockout Switch

Inputs

On/Off

Off

Window Lockout Switch Indicator Command

Outputs

On/Off

Off

Passenger Door Switch

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Battery Voltage Signal

Data

Volts

12.8 V

Passenger Window Switch

Inputs

Off/Up/Down/Express Down

Off

VIN Learned

Data

Yes/No

Yes

HVAC Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Rear Defrost LED

HVAC System Data

On/Off

Off

Rear Defrost State

HVAC System Data

On/Off

Off

Rear Defrost Switch

Inputs

Active/Inactive

Inactive