Why would a 2000 gmc envoy stall when starting?

check with GMC. There was a recall that came out about that and you can go to the GMC recall site and get the exact reason. Need to take it in though. Jerry There are other things that you can do first fairly easily. Sounds like fuel system problem. Change your air filter, your fuel filter, put in a bottle of Valvoline Synthetic Fuel Cleaner and change spark plugs. If your Envoy has done 100k miles on the same spark plug wires, change those too. Use only OEM wires. Also change your emmissions equipment, such as the EGR valve, PCV valve, O2 sensor and breather filter. These are all pretty easy jobs and the whole thing should take you under 2 hours with a repair manual. Shank