Car Information:
GMC HD3500
Year: 2001
Engine Size: Vortec 8100
Trans: Automatic

Issue/Question: Car shuts down when driving, if I wait a few minutes, it will start back up and has code ///tranmission controller mod, malfunction// where is it located, and whats wrong with it?

Most likely 2 problems will need to scan and look at transmission data and check the fuel pump module connector by the fuel tank for the intermittent stall.

Magic Mechanic
1432 Lee Road OrlandoFL32804 USA 
 • (407) 298-7447