Hello,
I own a 2007 Chevy 2500HD Classic, I was driving around when suddenly my ABS light came on as well as my service brake system light came on. When this happened my transmission became stuck in 1st gear in drive mode, but when I used the manual mode to shift it into 2nd it worked, also when I put the truck in reverse it stalled on me, these are a very strange group of symptoms and they’ve all started happening at once, also the speedometer stoped working as well. I have no idea where to start with this so I’m hoping someone has a slight idea of where to start, Thank you!
