Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 364 (PROGRAMMING AND SETUP - ALL SYSTEMS)REPAIR INSTRUCTIONSTHEFT DETERRENT MODULE PROGRAMMING AND SETUP (N. AMERICA EXCEPT CANADA)SET UP A THEFT DETERRENT MODULE (TDM) USING NEW KEYS
2008 Chevrolet HHR LT, 2.4 P, Automatic
Set Up a Theft Deterrent Module (TDM) Using New Keys
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Set Up a Theft Deterrent Module (TDM) Using New Keys
WARNING: This page is about a different car, the 2010 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Use this procedure only if replacing the TDM using new vehicle keys.
The TDM must be replaced prior to beginning this procedure.
The TDM must be replaced prior to beginning this procedure.
With Scan Tool
- Connect a scan tool to the vehicle.
- With a new, unlearned, vehicle key, turn ON the ignition, with the engine OFF.
- With a scan tool, select Theft Deterrent Module in the Vehicle Control Systems Module Setup data list.
- Select Step 1.
- Select Use New Keys.
- Follow the scan tool on-screen instructions.
Without Scan Tool
- With a new, unlearned, vehicle key, turn ON the ignition, with the engine OFF.
- Observe the security indicator. After approximately 10 minutes, the telltale will turn OFF.
- Turn OFF the ignition, and wait 5 seconds.
- Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
- Start the vehicle. The ECM has learned the fuel continue password.
- If additional keys are required to be learned, refer to Adding Keys .
IMPORTANT:
The engine controller learns the fuel continue password on the ignition switch transition from OFF to RUN. You must turn the ignition OFF before attempting to start the vehicle.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.