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I am going to go delete my thread as I am wondering why my 2011 suburban say cts-v

So I bought a 2011 Suburban a while ago, and I never really touch it outside of typical maintenance. The carfax shows an accident, and I recently had check engine light come on. I pulled the DTCs...

I am not an expert, but a stiff 1>2 shift is a classic mechanical sign of the valve body wearing out on a 4l60e, and you may want to look into a new valve body. You dont have to drop the transmission...

Does anyone know if there is a difference between 2011 and 2012 2.4 GMC Terrain pcm? I want to dive into my sister?s car with my tuner, but I only see 2011 and I thought 2010-2012 was the same model.