2007 Chevy Tahoe Service Theft Deterrent System

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2007 Chevy Tahoe Service Theft Deterrent System

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Service Theft Deterrent System Dash DRO and Light are displayed, vehicle will not start. I have checked all the fuses, Tried the 10 min 3 times bit, tried the disconnect both battery leads and hold together for 40-60 seconds and nothing.

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carriedi
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Joined: Wed Apr 10, 2013 12:42 pm
Location: Oregon

Re: 2007 Chevy Tahoe Service Theft Deterrent System

Unread post by carriedi »

If you have done all that, (https://www.youtube.com/watch?v=PVrJWz-XZ1Y) then you might need to hook up to a GM scanner with theft deterrent communications. See it there is a code for not recognizing the key. See if there is good communication from the theft deterrent module (the part that goes around the key) and the BCM. it could be a bad key module. When the key it turned to start the vehicle the transponder in the key is energized by the exciter ring coil that goes around the key. the key then sends out a signal that the system sees and checks if it's the correct signal to allow the vehicle to start and run. Sometimes the exciter goes bad.

Try other keys.

Verify fuses just in case. underhood fuse box: DLIS #34 and SEO B1 #52. Behind lower left of dash fuse box: DIM, BCM, DDM, DSM, PDM. just to be sure.

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