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2004 S10 Blazer gas tank

5K views 5 replies 5 participants last post by  47_47 
#1 ·
Over the past year I have had an intermittent problem with my gas tank. I have had the check engine light come on and sometimes the can not put gas in the tank even thou it is only 1/4 full. Last week I stopped for gas and they could only put in about 1 gallon. It kept spilling out despite me being almost on empty. I pulled out of the station and noticed the check engine light went out so I pulled into the next station and it filled up no problem. This is like the 3rd time this has happened in less then a year . Also the truck passed inspection not long before it happened first time and they did the gas tank test and it passed that.

Any thoughts???
Thanks
Joe
 
#3 ·
Did you check the engine? Was it still there? :laughing:

The check engine light will come on if your gas cap isn't tight. You probably have a bad float or sending unit inside the tank. I'd keep a log on your mileage and maybe carry a gas can until you figure it out or fix it.
 
#6 ·
Did you have the system scanned for codes? The controller(s) that turned on the check engine light will store the data at the time of the fault(s). The BCM will control your fuel gage and the ECM should control the EVAP circuits.
Check for code(s) and get wiring diagram(s) and check for areas in common. Intermittents are usually caused by wiring connections (terminal tightness) or bad grounds.
 
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