I successfully replaced my defective J72 Auto Park brake with a direct fit manual hand brake. This is the same E brake that GM Workhorse has used on there step van chassis ie. bread trucks, service vans for years. When our Auto Park failed and caught fire. The replacement from WH was going to cost $2,400 just for the brake assembly alone. Assuming the pump and actuator assembly were OK. If the actuator assembly were the cause the price for it could be another $2,000 plus labor on both. The manual replacement has cost less than $350 and that included all new parts. Only basic hand tools were required. I did have to fabricate a mount for the brake lever. The J72 is the new improved version of the Auto Park, and much different than the early style J71. Although this replacement should work on any Auto Park.
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