How do I change egr valve on 1997 GMC pickup?

To change the EGR valve on a 1997 GMC pickup, first, disconnect the negative battery cable to ensure safety. Then, locate the EGR valve, which is typically mounted on the intake manifold. Remove the vacuum lines and electrical connectors, then unscrew the bolts holding the valve in place. Install the new EGR valve by reversing the steps, ensuring all connections are secure, and finally reconnect the battery.