I fueled my 2005 chevy uplander and now my check engine light is on, and gas gauge marks empty. I will run it and slowly the gauge will move to half and then back to empty. Check engine remains on.
Re: I fueled my 2005 chevy uplander and now my check...
I had the same problem, a friend said to check gas cap to see if seals properly, bought a new one and the problem went away something to do with the vacuum seal but I do not quite understand that
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Question edited for clarity.
Question moved to sun-category.
You have modules issues. For that you need an auto-electrician with a pro grade scan tool computer. They collect data from each module and tell which are causing the issue. Likely to be ECM and BCM issues.
If your fuel gauge is showing you in accurate readings this is normal to all vehicles that are not used to fill-up gas full regularly but sometimes the cause of the inacuracy is due to faulty float valve in the gas tank you need to replace it
This problemis always caused by a defective fuel level sensor. The level sensor islocated of course in the gas tank. To change the level sensor you must remove the gas tank from the truck.
hey the reason your gas gauge is going from full to empty is that your fuel pump which is in the gas tank has a sensor that relays how much gas the tank has in it, the sensor is gone bad and will have to be replaced. And your engine light problem is probley due to putting gas in the car while it is running, my wife has a 2005 malibu and we have had the same problems with her car hope this was helpful
Common problem on the 03-06 Envoy instrument clusters for the fuel gauge to go out. It's usually caused by one of two main problems, either the stepper motor on the cluster's circuit board is going out or the sending unit on the fuel pump is going out. Check out this blog post about the problem - Envoy fuel gauge problems
Sending unit. Its all one unit including fuel pump, float, ect. The check engine light is because of the high or low resistance in the unit. Let me know if you have already fixed.. You have to drop the tank to get to it also.
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