GM Service Manual Online
For 1990-2009 cars only

Cruise Control Does Not Resume, Accel, Tap Up or Down Diesel Engine

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 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?

--

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?

--

Go to Step 5

Go to Step 6

4

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

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 -- 6.5L.

Is the repair complete?

--

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?

--

Go to Cruise Control System Check

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