1991 GMC C1500 Sierra 8 Cyl 5.7L
Transmissions & Drivetrains
When you go past a certain speed the truck just won't go and it starts smoking out of the end. When it starts to shifting at a certain speed is when it does it, i know its transmission related, i'm just not sure what needs to be fixed or if it needs to be taken to a shop. Please answer my question it would help me alot.
I know you have done your best to describe the problem. But, it needs a test drive by a good mechanic to decide what system is causing this.