I have an '89 2500 4WD Suburban with a 350. With only 54,XXX original miles, even though the clearcoat is peeling, you will all drool over her.

I drive the truck every day during the winter and once every 3-6 weeks in the warmer months.

I ran the tank very low a few weeks ago and she stalled out right in front of the gas station. She restarted and sputtered to the pump. I filled her halfway and ever since she starts easy but idles very rough until she stalls. if I double foot her and work the accelerator I can keep her from stalling. This morning I changed the fuel filter and added some Lucas fuel treatment. She idles and runs a little better but is still rough and will stall if I let her. She runs well and smooth at speed.

Please help! What should I look at next?

 

If you have an in tank fuel pump, it could have sucked up some dirt.

 

So I pulled codes for it today and got code 32 EGR valve and code 33 MAF (book said this could also be caused by a miss fire or unstable idle - which I have) so should I spend the $140 on a new EGR or check something else first?

 

EGR you can clean
Maf you can also clean

or pull the EGR and see if you have a difference in Idle. If nothing changes when you disable it then you have issues with that part.

start by doing smaller things like fuelfilter etc

Dont just throw money at it.
You still got the cats on it? (smell them as it will also produce the symptoms you describe)