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 MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 289 (SECURITY SYSTEM AND LOCKS SYSTEM)IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARINGNO. 5 RESETTING PROCEDURE FOR THE IMMOBILIZER SYSTEM WHEN REPLACING THE PCM OR INSTRUMENT CLUSTERPROCEDURE
2006 Chevrolet Suburban C2500, 6.0 U
No. 5 Resetting Procedure For The Immobilizer System When Replacing The Pcm Or Instrument Cluster: Procedure
2006 Chevrolet Suburban C2500, 6.0 USECTION Procedure
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Have two or more keys (key 1, key 2) ready for registration.
- Using key 1, turn the ignition switch to the ON position.NOTE:
- When replacing only the PCM: The security light illuminates for 3 s and then goes out.
- When replacing the instrument cluster: Although the security light flashes and DTC 15 is displayed, this does not indicate an improper procedure. Continue to perform the procedure as indicated.
- Connect the WDS or equivalent to the DLC-2.
- Select "Body/Security/PATS function" from the WDS or equivalent screen menu.
- Perform security access as indicated on the WDS or equivalent screen. (See NO.6 SECURITY ACCESS PROCEDURE .)
- Select "Parameter Reset" from the WDS or equivalent screen menu.
- Perform security access again as indicated on the WDS or equivalent screen. (See NO.6 SECURITY ACCESS PROCEDURE .)
- Select the replaced part as indicated on the WDS or equivalent screen.
- When replacing only the PCM: Select "PCM".
- When replacing only the instrument cluster: Select "HEC".
NOTE:- At this time, do not select any other parts from the WDS or equivalent screen menu.
- Perform the tasks according to the WDS or equivalent screen.
RENDER: 1.0x
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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.