GMC 1996 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 and wheel straps.
Towing a vehicle over rough surfaces could
damage a vehicle. Damage can occur from
vehicle to ground or vehicle 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 attach winch cables or J-hooks to
suspension components when using car carrier
equipment. Always use T-hooks inserted in the
T-hook slots.
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