I agree that your problem isn’t within the section of wire under the bed. If you had a can bus issue back there you would be getting more blind spot messages and the dash wouldn’t be freaking out like it is. Your issue probably is within the radio/HIM module (not the head unit itself) or the...
If I had 100k to burn on a vehicle and those were my only two options then the obvious choice is the 392.
If I had 100k and do what I want I would have kept Knuckles and done an LT5 swap w/ a10L80 and Dana 60’s on 40’s
Try swapping the left tail light. On some gm models the blind spot can buss travels thru the left module to the right. You will get an error code for the right module with the left working as intended. The ecm can talk to that module but doesn’t allow the communication to travel to the right...
That’s just poor maint by the sales team. When I worked at the gm dealer we had dead batteries on the lot all the time cause they were to lazy to get off their ass and run them for a bit
I just had my hood, doors, and hinges done for the first time. Hoping that if anything else pops up it’s before my warranty is up in June. Hope they fix yours right for good this time