99 suburban LS 5.7l V8 secondary air pump stays running

Started with the p0410 trouble code. Pump was seized, so replaced pump along with the check valve and hoses. Ran fine for about a day, then noticed pump was running when I passed by the vehicle. Unplugged it, plugged back in, and all seemed to be fixed. Now the check engine light back on, and again the pump stays running- vehicle turned off and key removed from ignition. Have to go borrow a code tester again, but wondering if anyone has any idea what is causing the pump to stay running? I don't want this one to burn up. I need to get it smogged for my reg renewal asap before I get penalized for it being late. Any help would be much appreciated, because the guy who replaced the pump and did the unplugging thing just wants to reset the codes and try again. I'm thinking there is a more logical reason or a step he neglected to do when replacing the pump. Thanks.

replace the air pump relay .

Does anyone have the troubleshooting steps to test the relay to make sure that is indeed the problem?

Does anyone have the troubleshooting steps to test the relay to make sure that is indeed the problem?

There are 48 individual steps for this system some of which require a high end scan tool to command the relay to turn the pump on or off. All the relays in the underhood center are the same. Next time it stays running pull the pump relay and replace it with one of the other relays.

If you want step by step guides go to https://alldatadiy.com/