What does a egr valve on 1999 gmc suburban look like?

The EGR valve on a 1999 GMC Suburban is located on the intake manifold. It is a round, black valve with a vacuum line attached to it. The valve is held in place by two bolts.

Here is a picture of an EGR valve:

[Image of an EGR valve]

The EGR valve is responsible for recirculating exhaust gas back into the engine. This helps to reduce emissions and improve fuel economy. The valve opens and closes based on the engine's speed and load.

If the EGR valve is not working properly, it can cause the engine to run rough and stall. It can also cause the engine to emit more pollutants.

If you are experiencing any of these problems, you should have your EGR valve checked by a qualified mechanic.