'99 Silverado - Evap Solenoid?

The one on my dad’s truck is bad, anyone know where it’s located, or what the part number is? It needs one for inspection.

Truck is a 1500 with a 4.3L/Auto.

theres two one on the left side engine by the vaule cover,other is between bed & cab on top thr tank,thats the one u want to change

The one on the tank is what needs changed - noted. Thanks Brian.

Get me the last 8 of the vin and i can get you a part number