GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Terrain 🢒 Safety and Security 🢒 Theft Deterrent 🢒 Content Theft Deterrent (CTD) Alarm Mode Inoperative

Step

Action

Values

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

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Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Open the driver and passenger windows.
  2. Unlock the doors using the power door lock switch or the keyless entry transmitter.
  3. Remove the keys from the ignition.
  4. Open the driver door.
  5. Observe the courtesy lamps.

Do the courtesy lamps illuminate?

--

Go to Step 3

Go to Courtesy Lamps Inoperative

3
  1. Open the driver and passenger windows.
  2. Unlock the doors using the power door lock switch or the keyless entry transmitter.
  3. Remove the keys from the ignition.
  4. Open the driver door.
  5. Observe the theft light emitting diode (LED).

Does the theft LED flash?

--

Go to Step 4

Go to Security Indicator Inoperative

4
  1. Lock the vehicle using the power door lock switches or the keyless entry transmitter.
  2. Observe the theft LED.

Does the theft LED change from flashing to on steady?

--

Go to Step 5

Go to Symptoms - Vehicle Access

5
  1. Close all of the doors.

    2. Important: Ensure that all the doors are closed. The Content Theft Deterrent System will not arm itself without all of the doors being closed.

  2. Observe the theft LED.

Does the system arm and the courtesy lamps turn off?

--

Go to Step 6

Go to Courtesy Lamps Always On

6
  1. Reach in and unlock the driver door manually.
  2. Open the driver door.

Do all of the alarm mode functions activate-parking lights flash and horn pulses?

--

Go to Step 7

Go to Step 8

7

Disarm the CTD system by inserting the door key into the driver door lock cylinder and rotate it to the unlock position, then try the passenger door lock cylinder.

Do all of the alarm mode functions stop?

--

Go to Testing for Intermittent Conditions and Poor Connections

Go to Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

8

Do any of the alarm functions activate?

--

Go to Step 1

Go to Symptoms - Lighting

9

Do the horns pulse only?

--

Go to Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Go to Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode