I had a 97 cavi z24, by the time it was 6 yrs old, i had replaced everything electrical. 1st alt, then starter, heater blower, rad fan, alt again, etc., etc.
the Tahoe should have a big alt, but a 97 is coming up to 10 yrs old.

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Alpine CDA-9887, TUA-T500HD, CHA-S634, CHA-1204 & KCA-410C
Pioneer TS-A6981, 6 x GM-5100T
Kicker 2 x CVR15,
MBQ RCE-216
PG MX2
Soundgate LanStar1
PAC SWI-ALP