Chevrolet T-Series Owner's Manual page 167

Towing Your Vehicle From the Front
(All Wheels On the Ground)
Your vehicle may be towed on all wheels provided
the steering is working. Remember that the
power brakes and power steering will not have
power assist. Vehicles with air brakes will not have
brakes. There must be a tow bar installed between
the towing vehicle and the disabled vehicle.
Before Towing
Block the wheels of the disabled vehicle.
On vehicles with air brakes, release the
emergency brake system by compressing the
brake chamber springs as outlined in this section.
(This is to prevent the possibility of the emergency
brake being applied during towing.)
On vehicles with hydraulic brakes, release the
parking brake fully by moving the lever to
the fully-released position.
If there is damage or suspected damage to the
axle(s), remove the axle shafts. Cover the
hub openings to prevent the loss of lubricant or
entry of dirt or foreign objects.
After Towing
1. Block the rear wheels and install axle shafts
and/or propshafts.
2. Check for proper phasing of universal joints.
3. Apply the parking brake system before
disconnecting from the towing vehicle.
4. Check and fill rear axle with oil as required.
167