I believe the 8 speaker system came out in 2001 as the "Sound and Sun" Package I saw an Alero on the dealer's lot with that option in 2001 when I had mine in for warranty work.
But yeah, if no amp behind the carpet on the left side on the trunk, no upgraded system
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2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
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