2004 GMC Yukon Owner's Manual - Page 201

If the word ON or the on symbol is lit on the passenger air bag status indicator, it means that the right front passenger's frontal air bag is enabled (may inflate). If the word OFF or the off symbol is lit on the air bag status indicator, it means that the passenger sensing system has turned off the right front passenger's frontal air bag. See Passenger Sensing System on page 1-81 for more on this, including important safety information. If, after several seconds, all status indicator lights remain on, or if there are no lights at all, there may be a problem with the lights or the passenger sensing system. See your dealer for service. {CAUTION: If the on indicator comes on when you have a rear-facing child restraint installed in the right front passenger's seat, it means that the passenger sensing system has not turned off the passenger's frontal air bag. A child in a rear-facing child restraint can be seriously injured or killed if the right front passenger's air bag inflates. This is because the back of the rear-facing child restraint would be very close to the inflating air bag. Don't use a rear-facing child restraint in the right front passenger's seat unless the air bag has been turned off. {CAUTION: If the off indicator and the air bag readiness light ever come on together, it means that something may be wrong with the air bag system. If this ever happens, have the vehicle serviced promptly, because an adult-size person sitting in the right front passenger seat may not have the protection of the frontal air bag. See "Air Bag Readiness Light" in the Index. 3-43