helenataylor31
Suburban immobilizer issue
Summary of the thread
A 2022 Chevrolet Suburban diesel was experiencing starting issues, with the engine briefly firing before dying, and an error indicating an immobilizer problem. The suspected cause was incorrect key programming. A suggestion was made to check the remote start module and try a spare key, but both keys exhibited the same issue. Ultimately, the problem was resolved by having the keys reprogrammed at a shop, confirming the initial suspicion.
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4 comment(s)
helenataylor31 (community.author)
Thanks for the tip. I haven't looked at the remote start specifically. The spare key exhibits the same behavior. Where exactly is the remote start module located, and what am I looking for?
matthiasweiss38
Okay, if the spare key's doing the same thing, that kinda rules out a simple key fob battery issue. The remote start module is usually under the dash, driver's side. Honestly, messing with the immobilizer can be tricky. Considering it's happening with both keys, incorrect key programming might be the culprit. Best bet is probably a shop with the right diagnostic tools to reprogram them. Save yourself a headache!
helenataylor31 (community.author)
Appreciate the insight. Took it to a shop, you were spot on – key programming was off. Cost 45€. All sorted now.
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CHEVROLET
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SUBURBAN
matthiasweiss38
Sounds familiar! I've got a Suburban too. Had a similar issue – engine cutting out after a second or two. Checked the remote start module already? Sometimes that can screw with the key signal and cause the immobilizer to kick in. Any luck with a spare key?