I bought a Blazer 6.2 -87 yesterday that's going to serve as my daily driver. I have a question thought about the charging system. On my other chevy trucks the ground from the battery is connected to the body in the front of the car but on this one it just seems to be connected to the engine. Is there a connection from the engine to the body somewhere or should it be grounded the same way as on a gasoline blazer? The reason I'm asking is that the system isn't charging too good only around 12,7-13 volts.