Schematic Reference: Cruise Control Schematics

Connector End View Reference: Powertrain Control Module Connector End Views in Engine Controls - 4.2L or to Powertrain Control Module Connector End Views in Engine Controls - 4.8L, 5.3L, and 6.0L

Did you perform the Cruise Control Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Cruise Control

Turn ON the ignition, with the engine OFF.

Does the Cruise indicator illuminate after the IPC displays test?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

1. Turn OFF the ignition.
2. Install a scan tool.
3. Turn ON the ignition, with the engine OFF.
4. With the scan tool, observe the Cruise Control parameter in the IPC data list.

Does the Cruise Lamp parameter display On?

Go to Step 6

Go to Step 7

Inspect for poor connections at the harness connector of the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 7

Important: Program the replacement PCM.

Replace the PCM. Refer to the appropriate procedure:

Did you complete the replacement?

Go to Step 8

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Important: Program the replacement IPC.

Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the replacement?

Go to Step 8

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Operate the system in order to verify the repair.

Does the system operate properly?

System OK

Go to Step 2