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<blockquote data-quote="KaeZoo" data-source="post: 2157286" data-attributes="member: 554753">Various models went to the Class II data bus system during different model years.&nbsp; Cavalier/Sunfire in 2000, Grand Am/Alero/Malibu as well as Impala/Monte Carlo in 01, Full-size trucks and SUVs in 03.&nbsp; A test is to determine whether the warning chime is being produced by the driver&#039;s door speaker; if so, removing the radio will remove the chimes.&nbsp; A few models use the data bus system for radio on/off but don&#039;t generate the chimes with the radio.Also, no DIN 1/2 radios use the data bus; only double-DIN.&nbsp; Bose is not an indicator, nor is RDS on the radio.Finally, some of the newest models like Cobalt, new Malibu, G6 use a completely different data bus system called LAN.&nbsp; That requires a different adapter than the Class II data bus vehicles.&nbsp; I&#039;ve seen reports of radio removal causing fault codes in the LAN-bus vehicles, but haven&#039;t run into it personally.</blockquote>

[QUOTE="KaeZoo, post: 2157286, member: 554753"] Various models went to the Class II data bus system during different model years. Cavalier/Sunfire in 2000, Grand Am/Alero/Malibu as well as Impala/Monte Carlo in 01, Full-size trucks and SUVs in 03. A test is to determine whether the warning chime is being produced by the driver's door speaker; if so, removing the radio will remove the chimes. A few models use the data bus system for radio on/off but don't generate the chimes with the radio. Also, no DIN 1/2 radios use the data bus; only double-DIN. Bose is not an indicator, nor is RDS on the radio. Finally, some of the newest models like Cobalt, new Malibu, G6 use a completely different data bus system called LAN. That requires a different adapter than the Class II data bus vehicles. I've seen reports of radio removal causing fault codes in the LAN-bus vehicles, but haven't run into it personally. [/QUOTE]

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