Egr valve Where and how do you change the valve on a 1999 chevrolet silverado truck 8 cyclinder

EGR valves work in an ugly environment. When they fail it is almost always a replace situation, as the exhaust damages the internal parts.
IF your code says problems with the EGR valve, consider replacing it.

Missing Egr Valve 1999 2006 2007 2013 Chevrolet Silverado GMC Sierra 1500

Hi there:
Here is a picture showing the EGR valve on the 4.8 Litre V8. The numbers below go with the picture. The arrow points to the front of the truck.

(1) Fuel Injector 2 Connector
(2) Throttle Actuator Control (TAC) Motor Connector
(3) Throttle Actuator Control (TAC) Motor
(4) Exhaust Gas Recirculation (EGR) Valve Connector
(5) Exhaust Gas Recirculation (EGR) Valve
(6) Fuel Injector 6
(7) Ignition Coil 2


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There are two type of emission classes.

Federal and California emissions.

Look under the hood for the emission class sticker.
Smog check station's machine in CA are programmed to handle both types.

You do not need to change anything before the inspection.

==== Side notes: You should check the service record for the last Catalytic converter,O2 sensors and EGR valve change.
Service interval for
Catalytic ~180,000 miles O2 ~150,000 miles EGR ~160,000 miles


If you can locate the last smog test (even from out of state) Check for the
CO NOx

egr sensor is holding egr valve open, could be bad sensor,also could be sensor getting a bad signal from truck computer. need to garage to see if there are any engine codes.good luck

it should just bolt on with 2 bolts.

If it is not just badly clogged, the intake does not need to be cleaned out. If you want to clean it out then take some brake cleaner and spray it in there and wipe it with a rag. I have never seen someone have to clean the intake due to not being clogged. Just my expierence I would just change the EGR and go from there

try cleaning the inside of the MAF sensor with CRC brand MAF cleaner, it is availiable at any auto parts store for around $5

The EGR valve is up on the left hand side of the engine RIGHT next to the oil filler cap.

It has an electrical lead running to it, and there is a pipe running down to the exhaust pipe.

Hope this helps!

The 2006 Silverado doesn't have EGR. They did away with it in '03 I believe.