...navigation dual din stereo system? I want to replace the factory stereo that comes standard in the GMC Terrain SLE-1 to the same exact model that is featured in the GMC SLT-1 & 2 model which is a Pioneer in-dash dual din navigation system but it seems that compartment above the factory stereo is preventing me from doing so. Is there away around this or am I able to replace the compartment door to the cover that's featured in the SLT models?