Duramax Lifetime Supporter
Join Date: Feb 2017
Location: Spanish Springs NV
Mine does it every once and while as well. I have researched it and talked with others that have had the same codes, and unfortunately, I have not heard of a solution yet. I donít remember everything that was tried by different people, but a few things were, 4 wheel drive switch, checked the wiring and connections at tcm trans and tc and nothing worked. And one guy put in a new tcm.
Itís hard to diagnose when it is so random. I got the codes maybe half a dozen times the first two years and then earlier this year it happened about 4 times in a month and I thought here we go, something is going to break and at last I will figure it out. Nothing broke and it hasnít happened since ( I know I just jinxed myself). The concerning thing for you is the putting it in park issue, mine doesnít have any other issues.
Hopefully you can find the problem or someone else will chime in and help out. I will go back and look at my old conversations about this and see if something doesnít help.
2016 2500hd Custom Sport, Z71, LTZ
Leveled with Moto 961's and 295/70\18 Ridge Grapplers,Amp steps, Weathertech mats, Extang Encore,S&B dry,
Wehrli intake bridge and AFE IC piping,Edge Insight cts2, AirDog II 165,SDP resonator delete, Mishimoto pcv catch can, MBRP down pipe,Recon led tail lights and third brake light, Morimoto mini D2S 5.0 projectors w/hidís, Morimoto 2stroke 2.0 ledís highs and fogs.
Kryptonite ucaís & tie rod sleeves, CCM diff drop,Fox 2.0 reservoirs, steering stabilizer, CalTracs,
Cognito PISK and heavy duty sway bar links, AirLift bags...