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

Test drive the vehicle.

Does the speedometer operate properly?

--

Go to Step 3

Go to Speedometer and/or Odometer Inaccurate

3

  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 .

Are 1 or more resistance measurements beyond the maximum or the minimum limits?

--

Go to Step 4

Go to Step 5

4

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

--

5

Inspect for bad connections at the compass and temperature display module.

Did you find any bad connections?

--

Go to Step 8 --

Go to Step 6

6

Inspect CKT 389 (DK GRN) for an open.

Did you find an open?

--

Go to Step 9

Go to Step 7

7

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

Is the repair complete?

--

Go to Driver Information System Check

--

8

Repair poor connection.

Is the repair complete?

--

Go to Driver Information System Check

--

9

Repair the open in CKT 399 (DK GRN).

Is the repair complete?

--

Go to Driver Information System Check

--