Your GMC Sierra doesn’t want to start? Have you tried everything? Battery, alternator, spare keys… And you feel like the trouble comes from your immobiliser ? It is reasonably plausible, in fact that it is in question if your car doesn’t want to start anymore or stalls when starting without a reason. You want to disable the immobiliser on your GMC Sierra ? You are on the good website, we have made this article to support you see more clearly and resolve your problems connected to this element. First, we will see how the immobiliser functions on your GMC Sierra, then the different techniques to disable it.
How your immobiliser system functions on GMC Sierra
Before describing the different alternatives available to you, here is a short intro to describe the purpose and functions of the immobilizer in your GMC Sierra. This electronic part came out 30 years ago and intends to prevent the theft of your GMC Sierra. In fact, thanks to a transponder and an antenna (coil) integrated in the key, and, a immobilisation control box integrated in the ECU and a reception antenna on the neiman, your GMC Sierra will go each time you put the key in the ignition, it checks that the code emitted by your key is in fact the one required by your immobilization box. It is only at this moment, that it will permit you to start. It is thanks to RFID technology (chip in the key) that this device will work.
The different possibilities to bypass the immobiliser on your GMC Sierra
Enter the code to turn off the immobiliser
First procedure, your key no longer allows your GMC Sierra to start, you want to disable the immobiliser of your GMC Sierra, but first of all you should try this approach to start it and take it to a mechanic check that you can not do a less significant process to restore the normal start of your vehicle. In fact, with your vehicle you should have a spare key (which you should try and which should start your GMC Sierra), but if you don’t have it you should at least have the “code card”, it contains the start code. Thanks to this code, you will still be able to start your vehicle by entering it manually. To do this, turn on the ignition, use your centralized button to enter the digits, several quick presses (example: 2 for digit 2) then a stop of one and a half seconds to validate the digit and resume, replicate the process until you have entered the whole code. This should allow your GMC Sierra to start without having to remove the immobiliser.
Repair your key at a key specialist or your car dealer
If despite a battery swap, several attempts to enter the immobiliser code on your GMC Sierra still doesn’t work, it’s likely your key that’s at issue. We can understand that you still want to bypass the immobiliser device from your GMC Sierra. In fact, your transponder must have been injured or must have fallen off your key. To correct this trouble, only solution, go to a key specialist (also available on the internet) or, at your car dealer who can restore your GMC Sierra key. Determined by who you go to the repair should cost you about 100 euros if you still have a duplicate or your “code card” and about 350 euros at your car dealer if you have no support and you want a new functional key, it will avoid you having to remove the immobilizer from your GMC Sierra.
Manually remove your immobilizer
Although you may be thinking to bypass the immobilizer from your GMC Sierra, this is not recommended at all for many reasons. First your GMC Sierra would be much more vulnerable to theft attempts. In fact, without an immobiliser box, simply doing “the wires” may be enough to start it. In addition to that, your insurance, in case of theft most likely won’t refund you if it finds out that the immobiliser on your GMC Sierra has been removed, bypassed or deactivated. This if you still want to do it, some sites still give the process, we have made the choice not to disclose it, because it could benefit people with bad intentions.
To get more tips on the GMC Sierra, take a look at the GMC Sierra category.
