I ordered this part and it works good for my 98 GP. I also have an 04 impala SS...this same part should work for this car as well, right? I called the parts guy at the stealership and was told that there is a different shaped part for the impala and they want $44 for it. I would think that since they are both w-body cars, that the part number from the pontiac would still work for my impala? anyone have any experience with these in the 04 impala body style? Thanks in advance