1982 G 3500 1 Ton Van L6-250 41L VIN D EGR Valve Location
point and flow rate.
NOTE: Ported Vacuum, Positive Back Pressure, and Negative Back Pressure EGR valves can be identified by the pattern on the back of the diaphragm
plate. Ported Vacuum EGR valves have a raised circular rib on the diaphragm plate. Positive Back Pressure EGR valves have a slightly raised X-shaped
rib on the diaphragm plate, while Negative Back Pressure EGR valves have a substantially raised X-shaped rib.
