2002 GMC Safari Owner's Manual - Page 147

2002 GMC Safari Manual

Page 147 highlights

Service AWD Light (If Equipped) This light should come on briefly when you turn on the ignition, as a check to show you it is working. Tow/Haul Light This light should come on when the tow/haul mode has been selected. The SERVICE AWD light comes on to indicate that there may be a problem with the drive system and service is required. Malfunctions can be indicated by the system before any problem is apparent, which may prevent serious damage to the vehicle. This system is also designed to assist your service technician in correctly diagnosing a malfunction. For more information, see "Tow/Haul Mode" in the Index. 2-74

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