i have a 2016 colorado duramax bought in october 2016. the first colorado duramax sold by my dealer. last night I had the check engine light on and of course that disables remote start. called the dealer this morning and have an appointment to leave it on friday. out of curiousity I ran the onstar diagnostics from my smart phone and it said unable to reach hotspot. so I went out to truck (aluminum siding on house) started the truck and ran the onstar diagnostics again. the check engine
cleared. I shut it off and remote start now works and the check engine light is off. called the dealer back and he said hopefully the check engine code is still in history. i have also had numerous other intermittent electrical problems
with the truck. the wipers stop in mid window when on high, the driver's window won't go down when dropping of a letter at post office, the other 3 windows worked. shutting of truck and restarting and the driver's window works again.
Other problems, experienced only when temps are single digit are dash lights go out for several minutes and then re-appear on their own. dash lights also flicker once in a while, I have also had service rear vision system appear but camera still works, and last when starting truck with key, the engine will crank for a second, it sounds like truck started but didn't and further cranking won't work till I turn key clear off and restart. I love the mileage of the truck 23.5 to 24.5 mpg around town and 27.9 - 28.1 on long trips on interstate. the truck tows my boat pretty well too (approx 3500 pounds) but of course mileage drops into the 16-17 mpg range. alll of these annoying electrical problems have me concerned in the long haul. truck now has 5500 miles on it.
I have a family connection to the wentzville plant in missouri. My the husband of my wife's cousin works there having transferred from a GM facility in muncie indiana