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A friend's son recently helped me replace the fuel filter on my daughter's 2007 Trailblazer. The tank still had 1/4 of fuel & was registering when we started the vehicle. After I drove it off the ramps, it went to E & will no longer register. (My helper had a previous engagement to get to & I had made him leave at this point.) I'm thinking the cable probably came loose but I have not been able to find anything regarding the location of the cable. Someone mentioned it should be at the top of the tank & might be able to reach it on a lift. I was making a parts run while he disconnected the cables so I don't know which was what. I'm trying to confirm the location of the cable before going through the trouble of having someone put it on a lift.
Thanks from a single semi self-sufficient mom. :)
 

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2004 gmc envoy_slt
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The wiring for the fuel pump and fuel level is located at the top of the tank. I doubt that it can be accessed without dropping the tank.
 
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