GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Cruise Control System Check performed?

--

Go to Step 2

Go to Cruise Control System Check

2

Is the complaint Cruise Control Does Not Resume/Decel or Tap Down?

--

Go to Step 3

Go to Step 4

3

  1. With a scan tool, observe the TIP SWITCH R parameter in the cruise control data list.
  2. Press and hold the RESUME/DECEL button on lkcruise control switch.

Does the scan tool display ACTIVE?

--

Go to Step 5

Go to Step 6

4

Is the complaint Cruise Control Does Not Accelerate or Tap Up?

--

Go to Step 7

--

5

Verify that the cruise control system will resume/decel or tap down.

Does the cruise control system operate properly?

--

System OK

Go to Step 8

6

  1. Disconnect the cruise control switch connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Connect a fused jumper wire across terminal B and terminal C of the connector.

Does the scan tool display ACTIVE?

--

Go to Step 9

Go to Step 10

7

  1. With a scan tool, observe the TIP SWITCH I parameter in the cruise control data list.
  2. Press and hold the SET/ACCEL button on the cruise control switch.

Does the scan tool display ACTIVE?

--

Go to Step 11

Go to Step 12

8

Replace the cruise control module.

Is the replacement complete?

--

Go to Cruise Control System Check

--

9

Replace the cruise control switch.

Is the replacement complete?

--

Go to Cruise Control System Check

--

10

Test for an open circuit in CKT FX500 (BLK/BRN).

Did you find and correct the condition?

--

Go to Step 5

--

11

Verify that the cruise control system will accelerate or tap up.

Does the cruise control system operate properly?

--

System OK

Go to Step 8

12

  1. Disconnect the cruise control switch connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Connect a fused jumper wire across terminal B and terminal D of the connector.

Does the scan tool display ACTIVE?

--

Go to Step 9

Go to Step 13

13

Test for an open circuit in CKT FB300 (BLK/YEL).

Did you find and correct the condition?

--

Go to Step 11

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