buy the haynes manual
2003 4.3's do not have an egr valve.
The 2003 Pontiac Montana EGR valve is located on the firewall. The valve will be on the driver side of the firewall.
Yes, it does have an EGR valve.
location of egr valve on 2002 kia spectra
The most common cause of that is a bad EGR Valve.
The EGR valve on a 2003 Grand Prix 3.1 Liter is located in the rear of the engine on the driver's side. The EGR valve will be connected to the exhaust pipe and is usually located near the end of it.
That would more then likely be the EGR VALVE
Next to the upper radiator hose, on the passenger side of the vehicle.
It is in the middle between the intake and the water pump.
check your egr valve or throttle positioning sensor
where is the erg valve located on a 2005 DuraMax 2500