1999 GMC Sonoma Owner's Manual - Page 104

yellowblue Convex Outside Mirror A convex mirror's surface is curved so you can see more from the driver's seat. Heated Outside Rearview Mirrors (If Equipped) Your vehicle may be equipped with heated outside rearview mirrors. When you operate the heated mirror button on your climate control system, the defogger will warm the mirrors to help clear them of ice, snow or condensation. CAUTION: A convex mirror can make things (like other vehicles) look farther away than they really are. If you cut too sharply into the right or left lane, you could hit a vehicle. Check your inside mirror or glance over your shoulder before changing lanes. Storage Compartments Glove Box To open your glove box, lift the lever on the front of the glove box and lower the door. The glove box should not be open while driving. Door Storage You will find a storage compartment on each door. 2-46