GM Service Manual Online
For 1990-2009 cars only

Circuit Description

An internal failure within the driver seat adjuster memory module will set DTC 55.

Conditions for Setting the DTC

Driver seat adjuster memory module hardware failure (EEPROM, RAM, or ROM are defective).

Action Taken When the DTC Sets

DTC 55 will set and the driver seat adjuster memory module will become disabled.

Conditions for Clearing the DTC

  1. DTC 55 will clear when the fault is no longer present.
  2. DTC 55 can be cleared by using the scan tool.

Diagnostic Aids

Replace the driver seat adjuster memory module.

Step

Action

Value(s)

Yes

No

1

Was the Power Seats System Check performed?

--

Go to Step 2

Go to Power Seats System Check

2

Replace and program the driver seat adjuster memory module. Refer to Memory Seat Control Module Replacement and Memory Seat Operation .

Is the repair complete?

--

Go to Step 3

--

3

  1. Operate the system in order to verify the repair.
  2. Use the scan tool to check for any DTCs.

Are any DTCs present?

--

Go to Power Seats System Check

System OK