i get a sulfur smell from time to time dealer says it's the type gas i use . any input would be great

Its not your gas choice. I have had to same problem and have put 10 different companies gas in it......its a design problem with the sequoia..it is rated tops for enviromental emmisions.....to get that rating the exhaust system (catylic converter) causes the smell problems....bummer no fix...

got the same problem on my 2004 sequioa.
I just put a post in asking the same thing.
Now I know I'm not the only one.