S10/T10 P/U 2WD V6-262 4.3L (1988)
EGR Electronic Vacuum Regulator Solenoid: Service and Repair
EVRV Filter Replacment
The EVRV filter should be replaced every 30,000 miles.
1.
Grasp and pull filter "OFF" with a rocking motion.
2.
Push new filter "ON", making sure cut-out for wires is properly aligned.