Where is the GMC Safari idle Control Valve located

Find the Idle Air Control Valve located near the throttle body...remove, (2 screws) clean with injector spray, including the spring, also spray into the housing and wipe out as sensor is removed...should auto reset as you drive above 35 mph...you can replace the Idle Air Control Valve for about $35.

likely inside the dash, behind the environment controls, fan controls, etc

how did you get your codes from your van because I have the same model and year but I can't get the codes

The fuel pressure regulator is dumping raw fuel into the engine or the EGR valve is stuck open. Check for a fault code 32 (EGR) and test the fuel pressure for a stable or constant reading. ( Not dropping)

for the most part its by the throttle body stop by your local GM-dealership in the parts department and they be able to print you off pictures and diagrams showing you where it is located and what it look like as well wish you the best of luck Michigan Man.

if no engine codes, then they have very common problem with th ECT....electronic coolant tempurature sensor....replace it with oem only...it is a two wire sensor for the computer...tell parts dept that for ease of location...

air leak somewhere or idle control valve

Im not sure if you got it fixed yet! It could possibly be idle air control valve. But here some more suggestions! I had a 94 Safari van 4.3 liter I was working on for about three days and I finally figured out what was wrong with it. It would run fine for a couple minutes and as soon as I hit the gas and let off it would surge, but anyways I ended up changing the distributer, after the fuel pump and filter, mass air flow sensor, egr valve, idle air control valve, map sensor, and ignition module. So that might sove the problem if you were on the same track with it as I was. Hope this helps ya!

First thing to check is the fuel filter. It is likely getting clogged and starving the engine for fuel under heavy load.

is the check eng lite on ?