hp tuner won't connect to ecu. error protocol not detected. I have removes both radio fuses still no avail. tried a good used ecu same issue. handheld scanner won't connect either.
hp tuner won't connect to ecu. error protocol not detected. I have removes both radio fuses still no avail. tried a good used ecu same issue. handheld scanner won't connect either.
Sounds like an issue at your OBD2 port. Get a wiring diagram for your connector and start checking for power/ground and your signal to the computer.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.