Trailer Tire Monitor System Setup

chasesfish

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My truck is 2021 GMC Sierra 1500 SLT 2WD/Texas Edition Premium Package. I received 4 Valve Stems from the dealer to install on my trailer tires. When I follow the procedure in the Manual to set up my trailer tires, my truck does not do what the manual says it should to accept the tires. My question is "do I have to return to the dealer to have this done or does my truck not have the ability to monitor trailer tires as equipped?
 
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