Theft deterrent system 2023 Denali ultimate

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Dragon800

TYF Newbie
Joined
Jan 31, 2023
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Been back to dealer numerous times.
Replaced right rear cargo glass for bad sensor. Theft deterrent alarm still going off. Goes off for about 20 seconds. Car had bad battery when I got it first week of owning it had to replace battery. Was told the theft deterrent system was going off due to rear glass sensor bad. I’m desperate here as the dealer has failed me so far. What keeps setting this off? It always says lift gate door hatch. Any help would be great
 

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