GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: 

   • Inspect the condition of the following fuses:
      - The BRAKE
      - The STOP LPS
      - The VEH STOP
      - The CRUISE
   • If you find any open fuse, locate and repair the source of the overload.
   • Inspect for any set vehicle DTCs. Refer to the appropriate DTC list from the following list:
      -  Diagnostic Trouble Code (DTC) List in Engine Controls - 4.3L
      -  Diagnostic Trouble Code (DTC) List in Engine Controls - 4.8L, 5.3L, 6.0L
   • Inspect for any set antilock brake (ABS) DTCs. Refer to Diagnostic Trouble Code (DTC) List in Antilock Brake System
   • Verify that ground G103 is clean and tight.
   • Inspect the cruise control linkage for loose, binding or improper adjustment.

1

  1. Disconnect the cruise control module.
  2. Turn the ignition switch to the RUN position.
  3. Turn the cruise control switch ON.
  4. Use a test lamp in order to front probe the cruise control module connector between terminal C and ground.
  5. While observing test light, press and hold the R/A switch.

Does the test lamp light?

--

Go to Step 2

Go to Step 5

2

    • Inspect for a short to ground in CKT 87.
    • Inspect for a poor connection at the cruise control module terminal C.

Did you find a short to ground or a poor connection?

--

Go to Step 3

Go to Step 4

3

    • Repair the short to ground in CKT 87.
    • Repair the poor connection at the cruise control module terminal C.

Is the repair complete?

--

System OK

--

4

Replace the cruise control module. Refer to Cruise Control Module Replacement .

--

System OK

--

5

Inspect CKT 87 for a poor connection or an open.

Did you find a poor connection or an open?

--

Go to Step 6

Go to Step 7

6

Repair the poor connection or the open in CKT 87.

Is the repair complete?

--

System OK

--

7

Replace the multifunction lever. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle

Is the repair complete?

--

System OK

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