Buick Repair Questions? Ask a Mechanic for Answers ASAP
Does this only occur after filling the fuel tank?
The problem you are experiencing when refilling the tank is typically due to a faulty evap purge solenoid located on back side of intake manifold. Replacing this should fix your problem. See attached image.
If you continue to experience problems with stalling and sputtering at times when not filling the tank, try unplugging the MAF. If the problem seems to go away, replace the MAF.
Is the check engine light on with the engine running?
Have you had the codes checked? If so, what are the code numbers?
If you have not yet checked codes, any auto parts store can do this for you. Let me know what the codes are and we can go from there.