GM Service Manual Online
For 1990-2009 cars only
Table 1: Memory Seat Module
Table 2: Driver and Passenger Door Switches
Table 3: HVAC Control Module
Table 4: Rear Heated Seat Module
Table 5: Rear HVAC/RSA

Memory Seat Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Driver Seat HVC Mode

Seat 1 HVC Data

Off/Back & Cushion/Back Only/Cool

Off

Driver Seat HVC Level

Seat 1 HVC Data

High/Medium/Low

High

Passenger Seat HVC Mode

Seat 2 HVC Data

Off/Back & Cushion/Back Only/Cool

Off

Passenger Seat HVC Level

Seat 2 HVC Data

High/Medium/Low

High

Driver and Passenger Door Switches

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Seat Back Heat Mode Ind. Cmd.

Outputs

Off/On

Off

Seat Back Heat Mode Sw.

Inputs

Inactive/Active

Inactive

Seat Heat High Ind. Cmd.

Outputs

Off/On

Off

Seat Heat Low Ind. Cmd.

Outputs

Off/On

Off

Seat Heat Medium Ind. Cmd.

Outputs

Off/On

Off

Seat Heat Mode Cmd.

Outputs

Off/On

Off

Seat Heat Mode Sw.

Inputs

Inactive/Active

Inactive

HVAC Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Driver Heated Seat Sw.

Inputs

Active/Inactive

Inactive

Pass. Heated Seat Sw.

Inputs

Inactive/Active

Inactive

Rear Heated Seat Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Left Rear Seat HVC Mode

Seat 1 HVC Data

Off/Back & Cushion

Off

Left Rear Seat HVC Level

Seat 1 HVC Data

High/Medium/Low

High

Left Rear Seat Cushion Heat Status

Seat 1 HVC Data

Inactive/Active

Inactive

Seat Heat Supply Voltage

Seat 1 HVC Data

Inactive/Active

Inactive

Right Rear Seat HVC Mode

Seat 2 HVC Data

Off/Back & Cushion

Off

Right Rear Seat HVC Level

Seat 2 HVC Data

High/Medium/Low

High

Right Rear Seat Cushion Heat Status

Seat 2 HVC Data

Inactive/Active

Inactive

Seat Heat Supply Voltage

Seat 2 HVC Data

OFF/ON

Off

Rear HVAC/RSA

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Left Rear Heated Seat Switch

Data Display

Active/Inactive

Inactive

Right Rear Heated Seat Switch

Data Display

Active/Inactive

Inactive