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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

Smurf oil or Dex 6

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Old June 22nd, 2017, 12:02 AM
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Default Smurf oil or Dex 6
I have a 2004 2500 Suburban 8.1L/4l85e with the RPO code NP8 which is the NVG246 (I believe). Do I still use Auto Trak II fluid or has Dex 6 replaced it? I haven't changed the transfer case fluid in a while now and figure it is time.
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Old June 22nd, 2017, 1:39 AM
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Should be the blue stuff. GMT900 started using ATF in the transfer case.
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Old June 22nd, 2017, 7:44 AM
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Thanks!
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