GM radios and most aftermarket units should Not have clock on w/ key off. Maybe the radio has problems. Or if aftermarket is wired wrong.
Of have blown fuse(s) like See my Cave,
Sneak PathDash Volts dip when turn lights blink, brake light on, etc. is often iffy grounds. Yes Ground
s and can be anywhere w/ problems.
Fix/clean every ground and metal bolted/screwed to then coat w/ brake or silicon grease.
check wires to the alt and battery cables too.
See my Cave,
Wire Service"steering wheel has to be slightly turned... to make the car go straight."
Can be anything...
Something in the front or back or both can cause that. Just 1 iffy Control Arm or Cradle bushing anywhere can do that.
And Still See "Good alignment" on an alignment machine.
Why?Driving loads up the bushings etc and change alignment vs static alignment on an alignment machine.
1 crap part can "fail" under driving loads but seem ok at alignment shop.
Finding iffy parts can be easy or very hard depending just what is wrong.
[This message has been edited by theogre (edited 07-02-2020).]