Hawksd1

Ok so I managed to troubleshoot and resolve. Actually pretty simple. When I changed out the battery and hooked back the leads to battery post the fluctuation of not being a solid contact and go created a corruption on the mylink/onstar. By removing the negative only and draining all capacitors by holding negative lead to positive side of battery and then re attaching negative lead it resets/reboots the two corrupted functions. Problem fixed for free. Other than reprogramming tpms sensor locations

2015 GMC Sierra replaced battery last weekend now OnStar isn’t lit up or functional and mic on hands free doesn’t work. I can hear them fine they can’t hear me at all. I can push the OnStar button all I want no response. Is there a specific fuse or fuses that are distinctly for those 2 functions? Or do I suck it up and disconnect battery and try for a reset and reprogram all my tpms sensors and radio stations

Thanks!!

Hopefully I’m doing this correct: ok 2015 GMC SLE crew cab 4x4 35-12.5-20s RBP m/t tires 6” mcgaughy lift airlift rear heavy duty airbags volant cold air induction dualled out flowmaster super10 series exhaust 4.5” black powder coated tips whats next: larger jet throttlebody and spacer dual battery charging system just ordered 26” BAP off-road led bar for behind grill then I’ll be researching superchargers lol