I have a S-10 95 Blazer 4-door 4x4. If I fill the gas tank, I have strong gas smell in the garage when it is parked. It seems too smell fine under 3/4 tank. I have done a visual and I can't see any leaks. I put over 200,000 miles on it and I like it. Can anyone help me? Thanks retiredblazer

 

I have the exact same problem. Interested to hear any opinions.

 

Most likely a leak near the top of the tank, or a rusted out filler neck.

 

this is what I had on my old truck

 

I've had gas spill out somewhere underneath near the spare tire when topping off the tank. Gas spilled everywhere !! What happened? Ever since I smell gas when tank is full and I stopped topping it up when filling but still smells.

Poster have you had anything similar?

 

sounds like your filler neck. You can buy new ones

 

I have had this problem before and I also got the evap leak code when the engine light came on(it took a real long time for it tho)
When the fuel was at half or lower there was pretty much no smell but i could smell it after filling it up.
I had a mechanic hook up a smoke machine to it and it ended up being a torn O ring as he called it which goes around the fuel pump. It was ripped. However this may or may not be the cause of your problem