OK, here is the time line:
Previous owner had injector swap in Kansas 300 miles ago
I buy truck from used truck dealer in California.
Truck then fills oil pan w fuel after 2 weeks , and leaks fuel from area near valve cover.
I take truck to local GM dealer. He says damaged injector return line, and I have to pay to fix it.

What recourse do I have ? Seems the Kansas dealer didn't do the job right, but I know they won't cover me since I'm a different owner in CA.
Obviously this would never have happened if the injectors were left alone.
To top it off, they say the injector return line costs $314 !!!
I'm stuck.
-Les

TTT, anyone? I think I might be in a similar boat and would love to see an answer

The used dealer didnt give you a 30 day warranty? If not check in the diesel supplement book to see if the part is covered. If your still under the inservice date of 5yrs and less than 100000 miles it would still be a $100 deductible. The fuel in the oil pan is a classic symptom of injector failure. It appears that either the job was done wrong or they didnt replace all 8 as required and you have another failure. Take it to another dealer. There are lots of dealers in so cal. Dont take the first answer from the dealer. The injectors are warrantied for 7yr / 200000miles with no deductible.

It wasn't the injector this time, it was a return line. I looked at the used part last night, and I don't see how it would be damaged. The ends with the tapered seal did look a bit more corroded than it should be. I'll bet it just needed cleaning and reassembly. So they were maybe fixing improper work done by a dealer in another state under a previous owner. Technically I would have to complain to the dealer that did the injector swap, but I'm a different owner, etc. I'm kinda stuck with the bill unless I can find a way to complain to GM , one step above local dealerships. I should not be paying for this since it was all due to the injector issue in the first place.
-Les

i bought a set of lines off ebay a while back and when i took my truck in i handed them the lines to replace. they can corrode and then they won't seal properly. one of my trucks had a corroded line and i had to pay to get them replaced. for what the dealer charges a new take-off set on ebay was dirt cheap.

That's what I think was 'wrong' with my return line, some crusty corrosion on the ends, where the taper seal is. If it was me wrenching it, I probably would have seen if I could polish the end to get rid of the junk. The corrosion looks like something I would expect on a water pipe, not a diesel fuel pipe !
Strange fuel maybe, by previous owner.

Anyone know what the pressure is in the return lines ? I would guess a lot lower than the other line.
_Les_

OK, here is the time line:
Previous owner had injector swap in Kansas 300 miles ago
I buy truck from used truck dealer in California.
Truck then fills oil pan w fuel after 2 weeks , and leaks fuel from area near valve cover.
I take truck to local GM dealer. He says damaged injector return line, and I have to pay to fix it.

What recourse do I have ? Seems the Kansas dealer didn't do the job right, but I know they won't cover me since I'm a different owner in CA.
Obviously this would never have happened if the injectors were left alone.
To top it off, they say the injector return line costs $314 !!!
I'm stuck.
-Les

Reminds me of my experience. Several years ago I took it in due to smoking. They replace 3 injectors. I drove home (about 5 miles) and parked the truck. I got out and smelled a strong diesel odor. I looked on the ground and saw a big stain on the drivers side under the engine. I started the truck and watched fuel pour out onto the ground. I called the dealer and had the truck towed back. They called a short time later to tell me that there is a bad injector return line and it would be mucho dinero to fix. We argued back and forth for a few minutes and they told me that I could come get the truck if I didn't want to pay for it. Of course I paid for it and promptly found an honest dealer about 10 miles further away who has been great to deal with.

This is the same dealer who I took the truck to when I had a transmission leak. They said it was a seal and after a couple of days I got back to get the truck. The dealer then said he's out test driving the truck. When he gets back he says it's leaking but in a different spot. Next day I get the call that the torque converter has a crack and needs to be replaced. Of course the cracked torque converter was not due to anything they did......right.