1999 GMC Sonoma Owner's Manual - Page 228

yellowblue Removing the Flat Tire and Installing the Spare Tire A. Front Frame Hole B. Rear Frame Hole (ZR2) 1. Using the wheel wrench, loosen all the wheel nuts. Don't remove them yet. 2. Turn the jack handle clockwise slightly to raise the jack lift head. 3. Fit the jack into the appropriate hole nearest the flat tire. C. Spring Hanger Hole (Standard Pickups) 5-24