Having problems with your GMC Sierra ?

2008 2500hd Duramax/Allison trans. Why is check engine light on?

\015 The check engine light comes on when the truck is in park and idles for about 2 min. stays on for about 2 days then goes off\015 Posted / edited by AnonymousUser on : 29-11-2021

Answers :

Have codes read by someone with good scanner that reads trans codes.
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