GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 Savana - AWD 🢒 Brakes 🢒 Antilock Brake System 🢒 Stability System Not Ready Indicator Inoperative

Circuit Description

The instrument panel cluster (IPC) illuminates the stability system not ready indicator during the IPC bulb check or when the electronic brake control module (EBCM) sends a serial data message to the IPC commanding the indicator ON.

Diagnostic Aids

Replace the IPC if the stability system not ready indicator intermittently fails to illuminate during the bulb check.

Test Description

The number below refers to the step number on the diagnostic table.

  1. This step tests if the IPC is able to illuminate the stability system not ready indicator during the bulb check.

Step

Action

Yes

No

1

Did you perform the ABS Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

2

  1. Turn OFF the ignition for 5 seconds.
  2. Turn ON the ignition while observing the stability system not ready indicator.

Does the stability system not ready indicator illuminate?

Go to Diagnostic Aids

Go to Step 3

3

Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.

Did you complete the replacement?

Go to Step 4

--

4
  1. Turn OFF the ignition for 5 seconds.
  2. Turn ON the ignition while observing the stability system not ready indicator.

Does the stability system not ready indicator illuminate?

System OK

Go to Step 3