GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Cruise Control System Check?

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Go to Step 2

Go to Cruise Control System Check

2

  1. Disconnect connector C266 at the steering column.
  2. Connect a digital multimeter (DMM), set on ohms, between connector C266 pins A13 for CKT 41 (BRN) pigtail wire and A15 for the CKT 87 (GRY/BLK) pigtail wire.
  3. Place the cruise control switch to the R/A position.
  4. Observe the DMM.

Is there continuity?

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Go to Step 3

Go to Step 4

3

  1. Disconnect connector C1 at the powertrain control module (PCM).
  2. Connect a DMM, set on ohms, between the PCM connector C1 pin D10 and connector C266 pin A15 for CKT 87 (GRY/BLK).

Is there continuity?

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Go to Step 5

Go to Step 6

4

  1. Inspect for an open in the CKT 87GRY/BLK) pigtail wire in the steering column, repair as necessary. Refer to Wiring Repairs .
  2. If no opens were found, replace the cruise control switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle .

Is the repair complete?

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Go to Cruise Control System Check

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5

Replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls.

Is the repair complete?

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Go to Cruise Control System Check

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6

Repair the open in the CKT 87 (GRY/BLK) wire between the connector C266 and the PCM. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Cruise Control System Check

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