at any point in this did you disconnect the battery and let it sit a few minutes, reconnect the battery and try again? these trucks can be very finicky with power and residual power especially when the battery goes dead
I had both disconnected for an hour or so. I had the battery on my charger.
Then replaced the hood ground.
Then reconnected the battery.
"Radio" and "Radio Amp" fuses in the box under the hood are good.
If it's a fuse (which I hope) I figure it would be the one inline or the one on the back of the head unit.
I used all adapters , didn't run new wire.
The Big [emoji241]: 06 Z71 Suburban
105k miles
5.3/4L60e yada yada yada
No engine/drivetrain mods
3" spacers/HD coils in the rear
Adjustable rear track bar/panhard bar
Indexed keys with a couple turns in the front
SpindleSource UCA's, OE replacement LCA's