2004 GMC Sierra 1500 Pickup Owner's Manual - Page 91

CAUTION: (Continued) vehicle serviced promptly, because an adult-size person sitting in the right front passenger's seat may not have the protection of the frontal air bag. See "Air Bag Readiness Light" in the Index for more on this, including important safety information. Aftermarket equipment, such as seat covers, can affect how well the passenger sensing system operates. You may want to consider not using seat covers or other aftermarket equipment if your vehicle has the passenger sensing system. See Adding Equipment to Your Air Bag-Equipped Vehicle on page 1-86 for more information about modifications that can affect how the system operates. {CAUTION: If the air bag readiness light in the instrument panel cluster ever comes on and stays on, it means that something may be wrong with the air bag system. If this ever happens, have the CAUTION: (Continued) {CAUTION: Stowing of articles under the passenger's seat or between the passenger's seat cushion and seatback may interfere with the proper operation of the passenger sensing system. 1-85