Toyota 2001 Tundra Owner's Manual page 63

Reference
Type 1: AM·FM ETR radio (with cassette
and compact disc auto changer control-
lers)
114
'01 TUNDRA_U (L/O 0008)
Type 2: AM·FM ETR radio/cassette player
(with compact disc auto changer control-
ler)
2001 TUNDRA (OM34416U)
Type 3: AM·FM ETR radio/cassette player/
compact disc player (with compact disc
auto changer controller)