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I have a 2013 3500 Duramax 4x4 SRW and I just lubed it. I think I counted 9 fittings to take care of on the front end. I used mobil 1 syn to lube it with. A couple are really hard to get too. You can take the skid plate down and it does make it a little easier. I only have 3k miles on it but wanted to lube before winter. My dealer also said it did not have any fittings but I looked myself. If you take to a dealer for your oil change make sure they hit the lube fittings also. I may do the oil myself also at 7500
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