GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Driver Information System Check?

--

Go to Step 2

Go to Driver Information System Check

2

Does the speedometer operate properly?

--

Go to Step 3

Go to Speedometer and/or Odometer Inaccurate

3

Ensure that the speed signal CKT 389 (DK GRN) is functional between the vehicle control module and the compass and temperature display module.

Is the speed signal circuit functional?

--

Go to Step 4

Go to Step 5

4

  1. Disconnect the ambient air temperature sensor.
  2. Measure the resistance of the ambient air temperature sensor at 2 different temperatures. Refer to Outside Air Temperature Sensor Resistance .

Is the resistance within the specifications?

--

Go to Step 6

Go to Step 7

5

Repair the open in CKT 389 (DK GRN) between the vehicle control module and the compass and temperature display module.

Is the repair complete?

--

Go to Driver Information System Check

--

6

Replace the compass and temperature display module. Refer to Driver Information Center Module Replacement .

Is the repair complete?

--

Go to Driver Information System Check

--

7

Replace the ambient air temperature sensor. Refer to Ambient Air Temperature Sensor Replacement in Body Front End.

Is the repair complete?

--

Go to Driver Information System Check

--