I recently put in a new motor into my Blazer. I went to turn the key and seem to be having issues. The starter is cranking way too slowly to start the engine. I have a new battery and starter, so both of those can be ruled out. Also, the positive wire going to the starter from the battery starts to get hot after a bit. I also noticed the ground going to the block, and that also got a bit warm. Could this be a bad ground issue? If so where and how can I find it? Also, the motor is getting fuel, air, spark, and compression (tested). This is the 4.3 V6 Vortec. Any help is appreciated

 

whats the voltage at the starter during crank?

George