Chevrolet Uplander Problems

Corrosion of the Fuel Tank Harness Due to Water Leak on Chevrolet Uplander

Problem Description and Possible Solution

Corrosion at the fuel tank to body harness may cause the Check Engine Light to illuminate or a crank no start condition. This corrosion issue is most commonly caused by a water leak inside the vehicle. Any damaged wiring or connectors will require replacement.

(16 people reported this problem)

Chevrolet Uplander Vehicles With This Problem

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Average mileage: 130,057 (52,000–222,222)
4 model years affected: 2005, 2006, 2007, 2008
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Viewing 1-6 of 6 comments
main wire harness runs under driver's seat and plugs into the floor in front of rear seat. The connection inside the van and underneath connectors are corroded. THERE IS A SMALL PLATE COVERING THE INSIDE CONNECIION. This is an easy removal. simply drill out two rivets and the plate comes off. Finding a non-corroded connection in a junk yard is difficult.
Mine feul tank can not get under a fourth of tank or my will run out gas! So strange it visibly clear i have gas in the tank but it still will run out gas with out being close to E! Dont let me be on a hill! It wont starte either!
I was told is a harness or something in my gas clearly says I have a quarter tank....but it's out of gas
Fuel system harness corroded and wire shorting out behind drivers seat. Can't find harness and taped wires. Code reads evaporator system problem. Took gas tank off to replace fuel pump before seeing the connector was rusted out bad.