hoping for a little help with a 2007 chevy express, I work in a bus garage and have been having some problems with this van. The symptoms are as follows:
Instrument panel goes dead, may die(lately a lot more often than not), once shut off, won't start. Not even a click of the solenoid. The last couple of times it happened, I disconnected the negative battery cable momentarily and once it was reconnected, the van started right up. Tech 2 revealed multiple loss of communication DTC's between the ECM, TCM, BCM, and EBCM.
I have checked connections, ground wires, ground straps, etc. Please help. Thanks