2018 Silverado "Service Theft Deterrent system"

Dukes64 · January 27, 2020

I recently (six months ago) bought a 2018 Chevrolet Silverado from a local delaership. About a month into my new purchase the truck would not start and the "service theft deterrent" message came across the screen. I waited about 5 minutes and then it started. This has been going on for as long as I have had the truck and I am so frustrated that a vehicle with 40,000 miles on it (had 30,000 +/- when purchased) would do this. The dealership from which I purchased the vehicle is NO help at all, they want to charge me upwards of 900.00 to replace some module. I have looked into "forums" and people are saying that you can reset this with your key fob, I DONT HAVE KEY FOBS. Is there anyone out there that can tell me how to fix this for good?

Snowcamo · January 28, 2020

I recently (six months ago) bought a 2018 Chevrolet Silverado from a local delaership. About a month into my new purchase the truck would not start and the "service theft deterrent" message came across the screen. I waited about 5 minutes and then it started. This has been going on for as long as I have had the truck and I am so frustrated that a vehicle with 40,000 miles on it (had 30,000 +/- when purchased) would do this. The dealership from which I purchased the vehicle is NO help at all, they want to charge me upwards of 900.00 to replace some module. I have looked into "forums" and people are saying that you can reset this with your key fob, I DONT HAVE KEY FOBS. Is there anyone out there that can tell me how to fix this for good?

Well just be cause you don't have key fobs doesn't mean you don't have the factory alarm, so you can check for it by opening the drivers door and pressing the lock button. It should ding a few times. Close the door. The alarm should honk the horn and lock the doors. At that point its endless possibilities. The dealer should be able to pull soft codes most shops can.

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garagerog · January 28, 2020

OP, did you lose the key fobs, or did the dealership sell you this truck without them? If the latter is the case you should be breathing hot and heavy down their necks to provide you with them at no charge to you. In a modern vehicle key fobs are almost a necessity, about like getting a vehicle without a steering wheel and be expected to steer with a pair of vise grips clamped on the steering shaft.

Dukes64 · January 28, 2020

I was told by the dealership that this vehicle did not have key fobs

JimCost2014 · January 28, 2020

1 hour ago, Dukes64 said:

I was told by the dealership that this vehicle did not have key fobs

Was it a CPO?

Dukes64 · January 28, 2020

Im not sure what CPO means

Snowcamo · January 28, 2020

Im not sure what CPO means

Have you confirmed the alarm yet?

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Dukes64 · January 28, 2020

No i have not confirmed yet

Snowcamo · January 28, 2020

No i have not confirmed yet

Cool deal. Well once confirmed couple of questions. Do you still have the factory radio? Once you exit do the interior lights/ radio stay on for long periods after the drivers door has been closed?

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Dukes64 · January 29, 2020

I have done what you asked. I Opened the door, locked it and waited, nothing. I do have the original radio and the lights do stay on after you walk away from it. I have noticed that the truck will honk the horn (randomly) when it is sitting alone (has happened a few times).

Snowcamo · January 29, 2020

I have done what you asked. I Opened the door, locked it and waited, nothing. I do have the original radio and the lights do stay on after you walk away from it. I have noticed that the truck will honk the horn (randomly) when it is sitting alone (has happened a few times).

Ok i think you are pressing the lock button by the window correct? I'm speaking of the one on the armrest by the window switches. All you should have to do is push it to lock, close the door and wait for it to honk.

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