I installed a RS 900LCD. (autopage remote starter and security combo) on 2003 Chevy Silverado, I also used a GM-SL2-i to interface with power door locks since this wasn't a base model truck. everything came out fine.
One day after the installation, the battery in this truck got discharged. The customer called after he tried to get in the truck using the key. but it did not work.
I went to his address and jump started the truck. Everything went back to work, but the key (or key hole) does not longer work when I try to unlock the doors. but the door locks work with the alarm remote transmitter and the factory remote as well.
I hope i explained my self.
Thank you again to all of you pros out there.!
Are the door cylinders just froze up or coroded inside. This is a common problem in my area nobody use the key in the door cylinder anymore with keyless entry a standard.
I think this is something else, because the door cyliders worked fine before. this truck is almost new, it only has like 12k miles on it. The customer does not drive it, unless it's sunny outside, and We live in Seattle!! ha ha (rains a lot here) ....I don't know, probably something to do with the factory alarm, on-star system, ????
Sounds as if something is mechanically wrong with the door cylinders. I doubt the alarm on onstar has any effect on the door cylinders, just a coincidence.
Sound mechincal to me as well. If you can lock and unlock the truck from the electronic switch but can't unlock or lock phyically with the key then you have a machanical issue. Also what version of the GMSL2i did you install in that truck. there is an update on that module. If it;s not version 1.9 i suggest you warranty that module and replace it with the current version or do the recommened fix. Just to let you know.
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"dont ground out!"