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Discussion Starter · #1 ·
My 2017 Colorado has been working pretty much flawlessly with just a bad NOX sensor being the only fault it's had. My wife brought it in to the dealer at 60,008 miles to do a transmission fluid swap. Then it dies on the road ~100 miles after service. I'm getting low fuel pressure and a fuel pump code. I've just had it towed to the Dealer.
According to my wife it took them 4 hours to do the transmission fluid change and the guy came out halfway through saying they didn't realize it was a diesel and had to change the price. Can anyone think of a way they could have screwed up and damaged my fuel system? I'm now 100 miles over warranty and I'm looking for ammunition to argue that I shouldn't have to pay for this.

Talk about convenient timing for them, fuel system shits the bed 100 miles over warranty!
 

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During the service did they change the fuel filters? If so they more than likely didn’t prime the low pressure side of the fuel system and allowed air to get to the high pressure side of the fuel system. This will cause issues with the high pressure fuel pump. After changing the fuel filters the key needs to be turned on 30 seconds and off three times without starting the engine before starting the truck.
 

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Discussion Starter · #3 ·
Thanks for the info, turns out there was a short in my harness. I still think the dealer screwed up and damaged the harness themselves but when I looked at it they've re-wrapped a huge section so I can't pinpoint with any accuracy where the damage occurred. The tech who did the repair was really vague about it as well and didn't want to go into detail. Itvended up being only a few hundred bucks plus the cost of a tow so I'm not going to make a huge fight of it but I'm never going back to that dealer again
 
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