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Bypassing Factory Amp
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<blockquote data-quote="keep_hope_alive" data-source="post: 8173854" data-attributes="member: 576029"><p>you're playing with the Class II Data Bus system and by not buying the GMOS adapter that retains safety chimes and other data you have compromised the safety of the vehicle. The ONLY approved method of replacing the head unit is to buy the appropriate GMOS adapter. A bypass of the safety chimes is not recommended and you are proceeding at your own risk in doing so. (example: since the seat belt chimes will no longer work, if someone doesn't wear one and the vehicle isn't in an accident, they can claim that their injuries are your fault because there were not reminded by the chime, and because you bypassed a known safety item, his insurance company can choose not to cover him.) in the eyes of the law, bypassing safety chimes is like removing air bags.</p><p></p><p>there is no ignition wire or turn-on wire because of the data bus system. the GMOS-04 adapter will give proper ignition as well as amp turn-on/amp interface.</p><p></p><p><a href="http://www.metraonline.com/part/GMOS-04" target="_blank">Metra Online</a></p><p></p><p><a href="http://www.metraonline.com/files/products/INSTGMOS-04_web.pdf" target="_blank">http://www.metraonline.com/files/products/INSTGMOS-04_web.pdf</a></p><p></p><p>list of the GMOS-4 features you retain:</p><p></p><p>• Provides accessory (12-volt 10-amp)</p><p></p><p>• Retains R.A.P. (Retained Accessory Power)</p><p></p><p>• Used in amplified systems</p><p></p><p>• Retains chimes</p><p></p><p>• Provides NAV outputs (Parking Brake, Reverse, Mute, V.S.S.)</p><p></p><p>• ASWC harness included (ASWC not included)</p><p></p><p>• Retains OnStar/OE Bluetooth</p><p></p><p>• Adjustable volume for chimes and OnStar</p><p></p><p>• High level speaker input</p><p></p><p>• USB updatable</p><p></p><p>• Retains balance and fader</p><p></p><p>It's not a Bose system but external amps are common regardless. Until he replaces all of the speakers you will reuse the stock amp and their built-in filters.</p><p></p><p>i know the cost of the harness is steep, and to make matters worse they are also unreliable. If you want to do installs for your friends, you need to do them correctly and not be a hack. Doing a correct install means buying the necessary interfaces and not compromising the vehicle's safety or other features.</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 8173854, member: 576029"] you're playing with the Class II Data Bus system and by not buying the GMOS adapter that retains safety chimes and other data you have compromised the safety of the vehicle. The ONLY approved method of replacing the head unit is to buy the appropriate GMOS adapter. A bypass of the safety chimes is not recommended and you are proceeding at your own risk in doing so. (example: since the seat belt chimes will no longer work, if someone doesn't wear one and the vehicle isn't in an accident, they can claim that their injuries are your fault because there were not reminded by the chime, and because you bypassed a known safety item, his insurance company can choose not to cover him.) in the eyes of the law, bypassing safety chimes is like removing air bags. there is no ignition wire or turn-on wire because of the data bus system. the GMOS-04 adapter will give proper ignition as well as amp turn-on/amp interface. [URL="http://www.metraonline.com/part/GMOS-04"]Metra Online[/URL] [URL="http://www.metraonline.com/files/products/INSTGMOS-04_web.pdf"]http://www.metraonline.com/files/products/INSTGMOS-04_web.pdf[/URL] list of the GMOS-4 features you retain: • Provides accessory (12-volt 10-amp) • Retains R.A.P. (Retained Accessory Power) • Used in amplified systems • Retains chimes • Provides NAV outputs (Parking Brake, Reverse, Mute, V.S.S.) • ASWC harness included (ASWC not included) • Retains OnStar/OE Bluetooth • Adjustable volume for chimes and OnStar • High level speaker input • USB updatable • Retains balance and fader It's not a Bose system but external amps are common regardless. Until he replaces all of the speakers you will reuse the stock amp and their built-in filters. i know the cost of the harness is steep, and to make matters worse they are also unreliable. If you want to do installs for your friends, you need to do them correctly and not be a hack. Doing a correct install means buying the necessary interfaces and not compromising the vehicle's safety or other features. [/QUOTE]
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