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.Google+
Car Problem Reports
Buick Rendezvous Corrosion of the Fuel Tank Harness Due to Water Leak
Buick Rendezvous Problem
Average Mileage: 115,626 mi (45,000 mi - 156,423 mi)
Visitor, 2003 Buick Rendezvous
check engine light is on due to corrosion on the wiring from underneath the driver side floor board leading to the fuel tank and or harness.
Visitor, 2002 Buick Rendezvous, 114,000 mi
Same corrosion of wire harness near fuel tank.
Visitor, 2002 Buick Rendezvous, 153,337 mi
low fuel light began coming on even though i hasd gass, and then it cut off in route because of no power to the fuelpump
Visitor, 2003 Buick Rendezvous, 45,000 mi
Vehicle shut off while driving on a major interstate which was under construction. Towed to dealership and they found corrosion on the wiring beneath car on drivers side. One week later had same problem but was able to drive it to the dealership. After 3 days they "weren't" able to replicate problem. I refused to retrieve the car as the first episode almost cost me my life as well as my children and grandchild. They discovered that the corrosion affected the entire wire harness from the drivers side to under the fuel tank. This solved that particular problem, though numerous other problems exist with this vehicle. ie 9 wheel bearing assemblies and counting!!
Visitor, 2002 Buick Rendezvous, 156,423 mi