Thread: GM DEF 24%
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Old 09-01-2020, 02:46 PM   #2
Speeddmn
 
Drives: Chevy Silverado
Join Date: Jul 2020
Location: Helena, MT
Posts: 40
Disco the batteries for 15-20 mins, fill the tank. If it still reads 24% then there is an issue in the tank. There are policies for certain vehicles to be covered on the def heater for 120k miles.
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