I am in need of your help again. Vehicle is a 2000 Silverado 1500 w/
5.3l ~70k miles. About 2.5 years ago, I had a P1416 - Seconday air
injection system bank 2 malfunction. The truck was under warranty so
it was fixed. The dealer found a bad pressure relief valve on the
passenger side. Now, the check engine light is back on and I am
getting a P0410. According to a quick web search, this is a Seconday
Air Injection System Malfunction. Does anyone know where to start
with this? Is this a DIYer type of repair?