Do you need to warm Chevrolet venture before removing water pump?

You don't *need* to warm a Chevrolet Venture's engine before removing the water pump, but it's generally recommended. A warm engine will have some residual heat, making the coolant less viscous. This can make draining the coolant easier and reduce the risk of coolant splashing or spilling during the pump removal. However, it's not strictly necessary, especially if you're careful and have adequate drainage containers. The main reason to drain the coolant is to prevent a mess and protect the environment, not to improve the ease of pump removal.