Test Description
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step tests for an intermittent condition.
- 3: This step determines if the failure is the result of a faulty instrument cluster.
Differential Lock Indicator Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: All-Wheel Drive Schematics | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Verify the fault is present. Does the system operate normally? |
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 5 |
| 4 | Replace the PCM for 3.5L or the TCM for 3.9L. Refer to Control Module References
for replacement, setup and programming. Did you complete the replacement? |
Go to Step 6 | - |
| 5 | Replace the instrument panel cluster. Refer to Cluster, Cluster Trim Plate Replacement - Instrument Panel
. Did you complete the replacement? |
Go to Step 6 | - |
| 6 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |