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jhplak325

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About jhplak325

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    Enthusiast

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  • Location
    Southeast PA
  • Gender
  • Drives
    2015 GMC Denali HD LML

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  1. In order to see the trans temp on a Denali, press the tow/haul button. Then it will display and it replaces the battery voltage gauge.
  2. Frame Coating

    That is how they all are. It is a wax coating.
  3. No 6.2 in the 2500 or 3500. 6.0 or 6.6 Duramax
  4. 2014 HD trucks aren’t an odd year, HD’s for the GMT900 trucks ran from 2007.5 to 2014 with a chassis change in 2011. the block heater is for the coolant. i have never plugged my Duramax in and the coldest it has seen was -5 this past winter in upstate New York
  5. 2 wires under the hood need hooked up, 1 is for the brake controller and the other is to supply 12v at the 7 plug.
  6. Is that the certified one they had there about a week ago?
  7. 2015+ trucks it is at the rear of the truck - https://gm.oemdtc.com/7951/pit5273a-5th-wheel-or-camper-wiring-harness-location-2015-2016-chevrolet-silverado-gmc-sierra
  8. 14-18 OEM Retractable bed steps

    Message sent
  9. 14 bolt axle

    2500’s with the 6.0 have the 10.5 axle. 2500’s with the Duramax and all 3500’s have the 11.5 axle. Up front is the 9.25.
  10. 2500 VS 3500

    2500’s with Duramax also get 11.5 rear.
  11. Have you looked at all the wiring on trailer? Trailer brakes good? Looked at the trailer plug on the trailer?
  12. I would look at the 7 plug on the trailer, GM recommends using a Pollak plug on the trailer side. My camper had a Bargman molded 7 plug and I couldn’t get a good connection, replaced with a Pollak and haven’t had a problem since. GM TSB -
  13. Factory 5th wheel prep isn’t available on the 1500’s. On the HD’s you can add it after the fact, but it isn’t cheap.
  14. Fog Lights Were Useless

    I have the Morimoto’s on my 15.5 and they are great in everything but heavy wet snow. Since they don’t put out a lot of heat, they get covered very easily.
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