2010 Lacrosse, total desparation

[Builder_123]

I joined this site in hopes of help. I've got a 2010 that im about ready to drive off a cliff. it has som many elactrical glitches that i cant even list them all here. my problems started when i put the car away for the winter. I've got a beater i use in bad weather. I guess freeze thaw caused one of the moonroof drains to pop off and filled the trunk with water. it killed my blind spot/park assist. i know with 99% certainty its got a bad module from being submerged but i cannot find anything regarding which it is. anyone know? Next the keyless locking on the passenger door started working intermittantly. i can live with this. Next up, the horn quit. never had a horn quit on me befor but hey, not that hard to fix, right? No. checked fuse, still good. The horn is ok becuase it still chirps when i lock the doors. I figure its got to be the relay. only problem is the relay isnt shown in the OM manual and i cant find data on its location. the final problem is now my stabilitrac and ABS have cut out. Does anyone have fixes or suggestions for these problems? Or maybe i should just ditch the car and move on. its a shame because overall i love the car but im not going to take it to a dealer and have him tell me something i already know or have him charge me $250 to put in a $15 relay

 

[Mad*Max]

I don't know why you would go to a dealer - go to an independent that you trust

 

[HMTJ6821]

It is not the part that costs so much; nor the difficulty of the installation. It is the experience and knowledge to know what needs to be done. Take it to the dealer--at least for an estimate.

 

[douger]

I joined this site in hopes of help. I've got a 2010 that im about ready to drive off a cliff. it has som many elactrical glitches that i cant even list them all here. my problems started when i put the car away for the winter. I've got a beater i use in bad weather. I guess freeze thaw caused one of the moonroof drains to pop off and filled the trunk with water. it killed my blind spot/park assist. i know with 99% certainty its got a bad module from being submerged but i cannot find anything regarding which it is. anyone know? Next the keyless locking on the passenger door started working intermittantly. i can live with this. Next up, the horn quit. never had a horn quit on me befor but hey, not that hard to fix, right? No. checked fuse, still good. The horn is ok becuase it still chirps when i lock the doors. I figure its got to be the relay. only problem is the relay isnt shown in the OM manual and i cant find data on its location. the final problem is now my stabilitrac and ABS have cut out. Does anyone have fixes or suggestions for these problems? Or maybe i should just ditch the car and move on. its a shame because overall i love the car but im not going to take it to a dealer and have him tell me something i already know or have him charge me $250 to put in a $15 relay

If the horn is blowing at all, I wouldn't think it'd be the relay. Spitballing here, but that seems to be the horn contact. You need to pull the airbag module to get to it.

https://gsi.ext.gm.com/image_en_us/gif/000/002/199/2199805.gif

The park assist module is located on the left side of the trunk.

https://gsi.ext.gm.com/image_en_us/gif/000/002/207/2207705.gif

Does the passenger door lock open and close consistently with the lock switch? If not, it's probably the lock.

But hey, don't bring it to a dealer. We're just a bunch of know nothing thieves.

 

[Knuckle Dragger]

Based on your diagnostic reasoning posted above you really need to take this to a mechanic. Your understanding of how things work is limited. I'm not posting that to be an ass. I'd just hate to see you throw more money at parts guessing then it will run you to have it correctly diagnosed.