GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Savana 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Speedometer and/or Odometer Inoperative

Speedometer and/or Odometer Inoperative Gasoline

Step

Action

Value(s)

Yes

No

1

Was the Instrument Cluster System Check performed?

--

Go to Step 2

Go to Instrument Cluster System Check

2

In order to inspect for conditions with the vehicle speed sensor (VSS) and the vehicle control module (VCM), perform the following diagnostic tests:

    • ABS Diagnostic System Check in Antilock Brakes
    • Powertrain OBD System Check in Engine Controls

Did you perform these tests?

--

Go to Step 3

--

3
  1. Disconnect the connector at the instrument cluster.
  2. Disconnect connector C4 at the VCM.
  3. Connect a J 39200 between the instrument cluster connector, cavity B14 for CKT 389 (DK GRN), and ground.

Is continuity present?

--

Go to Step 4

Go to Step 5

4

Repair the short to ground in CKT 389 (DK GRN) between the VCM and the instrument cluster.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

Go to Step 5

5

Connect a J 39200 in CKT 389 (DK GRN) between the instrument cluster connector, cavity B14 and VCM connector C4, cavity 4.

Is continuity present?

--

Go to Step 6

Go to Step 7

6

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--

7

Repair the open in CKT 389 (DK GRN) between the VCM and the instrument cluster.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--

Speedometer and/or Odometer Inoperative Diesel

Step

Action

Value(s)

Yes

No

1

Was the Instrument Cluster System Check performed?

--

Go to Step 2

Go to Instrument Cluster System Check

2

In order to inspect for conditions with the vehicle speed sensor (VSS) and the VSS buffer perform the following diagnostic tests:

    • ABS Diagnostic System Check in Antilock Brakes
    • Powertrain OBD System Check in Engine Controls

Did you perform these tests?

--

Go to Step 3

--

3
  1. Disconnect the connector at the instrument cluster.
  2. Disconnect the connector at the VSS buffer and powertrain control module (PCM) connector C2.
  3. Connect a J 39200 between the instrument cluster connector, cavity B14 for CKT 389 (DK GRN), and ground.

Is continuity present?

--

Go to Step 4

Go to Step 5

4

Repair the short to ground in CKT 389 (DK GRN) between the VCM and the VSS buffer and the PCM and the instrument cluster.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

Go to Step 5

5

Connect a J 39200 in CKT 389 (DK GRN) between the instrument cluster connector, cavity B14 and the VSS buffer connector, cavity 15 (Diesel).

Is continuity present?

--

Go to Step 6

Go to Step 7

6

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--

7

Repair the open in CKT 389 (DK GRN) between the VSS buffer and the instrument cluster.

Is the speedometer and/or the odometer operative?

--

Go to Instrument Cluster System Check

--

Speedometer and/or Odometer Inoperative Gasoline Export

Step

Action

Value(s)

Yes

No

1

Was the Instrument Cluster System Check performed?

--

Go to Step 2

Go to Instrument Cluster System Check

2

Perform the diagnostic testing. Refer to applicable testing in Antilock Brake System and Engine Controls. This testing will identify problems with the following components:

  1. The Vehicle Speed Sensor
  2. The Vehicle Control Module (VCM)

Is the repair complete?

--

Go to Instrument Cluster System Check

Go to Step 3

3
  1. Disconnect the connector at the instrument cluster.
  2. Disconnect the connector C4 at the VCM.
  3. Connect a J 39200 between the following components
    4. • The instrument cluster connector cavity B14 for the CKT 389 (GRN) wire
    • Ground

Is continuity present?

--

Go to Step 4

Go to Step 5

4
  1. Locate the short to ground on the CKT 389 (DK GRN) wire between following components:
    2. • The VCM
    • The instrument cluster
  2. Repair the short to ground on the CKT 389 (DK GRN) wire between following components:
    3. • The VCM
    • The instrument cluster

Is the repair complete?

--

Go to Instrument Cluster System Check

--

5

Connect a J 39200 between the following components:

    • The instrument cluster connector cavity B14
    • The VCM connector C4 cavity 4

Is continuity present?

--

Go to Step 6

Go to Step 7

6

Replace the instrument cluster.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

7
  1. Locate the open in the CKT 389 (DK GRN) wire between the following components:
    2. • The VCM
    • The instrument cluster
  2. Repair the open in the CKT 389 (DK GRN) wire between the following components:
    3. • The VCM
    • The instrument cluster

Is the repair complete?

--

Go to Instrument Cluster System Check

--

Speedometer and/or Odometer Inoperative Diesel Export

Step

Action

Value(s)

Yes

No

1

Was the Instrument Cluster System Check performed?

--

Go to Step 2

Go to Instrument Cluster System Check

2

Perform the diagnostic testing. Refer to applicable testing in Antilock Brake System and Engine Controls. This testing will identify problems with the following components:

  1. The Vehicle Speed Sensor
  2. The Vehicle Speed Sensor Buffer (VSSB)

Is the repair complete?

--

Go to Instrument Cluster System Check

Go to Step 3

3
  1. Disconnect the connector at the instrument cluster.
  2. The VSSB and Powertrain Control Module (PCM) connector C2
  3. Connect a J 39200 between the following components
    4. • The instrument cluster connector cavity B14 for the CKT 389 (GRN) wire
    • Ground

Is continuity present?

--

Go to Step 4

Go to Step 5

4
  1. Locate the short to ground on the CKT 389 (DK GRN) wire between following components:
    2. • The VSSB
    • The PCM
    • The instrument cluster
  2. Repair the short to ground on the CKT 389 (DK GRN) wire between following components:
    3. • The VSSB
    • The PCM
    • The instrument cluster

Is the repair complete?

--

Go to Instrument Cluster System Check

--

5

Connect a J 39200 between the following components:

    • The instrument cluster connector cavity B14
    • The VSSB connector cavity 15 for the CKT 389 (DK GRN) wire

Is continuity present?

--

Go to Step 6

Go to Step 7

6

Replace the instrument cluster.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

7
  1. Locate the open in the CKT 389 (DK GRN) wire between the following components:
    2. • The VSSB
    • The instrument cluster
  2. Repair the open in the CKT 389 (DK GRN) wire between the following components:
    3. • The VSSB
    • The instrument cluster

Is the repair complete?

--

Go to Instrument Cluster System Check

--