Took my 2005 GMC 2500 Duramax in for a leak on #7 injector supply line, they told me that I needed a new injector which I didnt have a choice to do so they put it in for $800 plus. They also said I needed a new electrical connector for the injector for $100. We then took the truck on a trip to Michigan and on the way back the truck went into reduced power mode. I pulled over to find the same fuel line leaking so I limped to the nearest exit and had the truck towed into the nearest GMC shop. They looked at it the next morning and showed me that the connector was never replaced and the fuel line needed replaced as it had a groove in it that was leaking. As they showed me the same codes came up when the injector was bad and a problem with the fuel line I'm sure the injector was never bad in the first place. We spoke with Colonial with no coverage so we are out another $900 plus hotel room and rental vehicle. I would not take a bicycle to colonial and I will be selling all GM vehicles to include my Trail Blazer and two Jeeps and will never buy again maybe we will try Toyota.
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