GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the Driver Information Center Description and perform the necessary inspections?

--

Go to Step 2

Go to Diagnostic Starting Point

2

Does the speedometer operate properly?

--

Go to Step 3

Go to Speedometer Inaccurate or Inoperative

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

Initiate the self-calibrating function or set the variance.

Does the compass remain inoperative or inaccurate?

--

Go to Step 6

Go to Step 7

5

Repair the open in CKT 389 (DK GRN). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 7

--

6

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

Did you complete the repair?

--

Go to Step 7

--

7

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2