1996 GMC Sonoma Owner's Manual - Page 196

NOTICE: Do not tow with sling-type equipment or rear bumper valance damage will occur. Use wheel lift or car carrier equipment. Additional ramping may be required for car carrier equipment. Use safety chains andwheel straps. Towing a vehicle over rough surfacescould damage a vehicle. Damage can occur from vehicle to ground orvehicle to wheel-lift equipment. To help avoid damage, install a towing dolly and raise the vehicle until adequate clearance is obtained between the ground and/or wheel-lift equipment. Do not attachwinch cables or J-hooks to suspension components when using car carrier equipment. Always use T-hooks inserted in the T-hook slots. 5-10