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Old 11-21-2018, 11:32 PM   #1
jmill8
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GMC Sierra

Have 2008 GMC Sierra with Duramax. Have read multiple articles re problem with diesel down pipe. Anyone experienced this problem or similar with Duramax. Recently passed 100K miles, had fluids and serpentine belt replaced per GMC recommendation. Any pointers re what problems to expect at this mileage with this engine? Truck performance exemplary to this point.
 
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Old 11-22-2018, 08:34 AM   #2
mhs4771
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Only problems I had with my '11 Silverado were emission issues, like EGR Cooler and bad NOx sensors. Had 115K on in Jan when traded for an '18 High Country.
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Old 11-22-2018, 11:11 AM   #3
Kid1956
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try going here... these guys know their...stuff.. and all they do is Duramax.
They will Q&A, and also have a forum.. all youll need to know. Good people.

https://dmaxstore.com/products/
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Old 11-22-2018, 02:22 PM   #4
Mikendebbie
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Duramax

Also look at duramaxhub.com - there is a list of common problems but they are mostly for LB7 engine. Nothing listed for LMM version except DPF issues, and I read a long thread discussing transmission fluid lines to the cooler having leak problems.
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