Is anyone experiencing this or is it just me? My Volt wasn't producing heat when on battery power and I was told the coolant pump went up. The service manager told me they don't have any parts in stock and had to order from GM. Now, over 3 weeks have past and my car is still sitting at the dealership waiting for a coolant pump!!! I called several times and the answers have been the same - "GM has a shortage of the parts and every dealership nation-wide is experiencing the same issue, not just this dealership." Can GM really be this bad on their parts supply chain?