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Discussion Starter · #1 ·
So I decided to swap from a Ford to a GMC this week. I bought a 2015 Denalli HD with 86k on the LML and Allison transmission. My question is, what do I need to be concerned with on this truck? Every vehicle make has its issues. What kind of overall miles can I expect to get out of this truck? So far I love it and having no regrets. I’ll be pulling a 15k pound bbq trailer with it and only putting probably 3-4K miles on it a year. It’s never been tuned and is 100% bone stock and that’s how I intend to leave it. I’m not into making it fast, I’m into it lasting me a loooooong time
 

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Discussion Starter · #4 ·
Thanks for that info! What is everyone using for a fuel additive that seems to be working the best?
 
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