Dual Diaphragm EGR Valve Question... PLEAS HELP! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TIMSPEED · 03-27-2003, 06:26 PM

Amazingly, in the 1975 model year, it was possible to get a C10 withOUT AIR tubes in the exhaust manifolds, but if you did, it meant you had to have a Dual Diaphragm EGR Valve. Now, since my dad was cool like that, and I have one of these lucky trucks, does anyone know how the dang thing hooks up? I'm pretty sure I've got the top tube hooked up right (to the TVS Switch on the thermostat housing) but as for the bottom..I have no idea...or where can I get a vacuum diagram? HEEEEELP! This is the only thing I need to get done for this truck to pass it's final smog inspection (it becomes smog EXEMPT after it does!)

03-27-2003, 06:26 PM	#1
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	Dual Diaphragm EGR Valve Question... PLEAS HELP! Amazingly, in the 1975 model year, it was possible to get a C10 withOUT AIR tubes in the exhaust manifolds, but if you did, it meant you had to have a Dual Diaphragm EGR Valve. Now, since my dad was cool like that, and I have one of these lucky trucks, does anyone know how the dang thing hooks up? I'm pretty sure I've got the top tube hooked up right (to the TVS Switch on the thermostat housing) but as for the bottom..I have no idea...or where can I get a vacuum diagram? HEEEEELP! This is the only thing I need to get done for this truck to pass it's final smog inspection (it becomes smog EXEMPT after it does!) __________________ I have a few cars... See Them Here

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