Anyone have issues with a coolant leak the dealer “can’t find”.
I bought my l5p denali duramax about 6 months ago and have put 15k on it in those 6 months. Mostly used for pulling my 43’ fifthwheel.
Anyway the issue. At 3k the low coolant light came on and I brought it to the dealer. I was told air had not been properly removed from the cooling system when assembled so they burped it and I was on my way. I was good till 11k miles. At 11k the light came on again and I brought it in. The radiator was replaced, brought it home and started it a couple days later and the coolant light came on. Called the dealer same story burping air out so I topped it off myself. 11k noticed coolant puddle under it and coolant drips on passenger frame rail by front bumper. Brought it in and dealer couldn’t find a leak so I took it home. Two days later the coolant light came on and multiple drips were on the frame.
So at this point I have executive GM involved with trying to figure it out. A couple things at this point have me worked up. Not one time was I offered a loaner car not once. After the radiator was replaced they put The plastic skid plate one under the radiator and broke it and left it on.
So now I want a loaner when I drop it off. I wait almost a month before they give in and give me one and bring the truck back in. At this point the over flow is almost empty so it’s not leaking very fast. The truck now has 15k on it.
I bring it it in and get a loaner car for the first time with 15k on it and the 4th visit in 6 months. Dealer still can not find a leak. I asked them to climb under they truck and look at the frame rail for coolant. He calls back and says it’s dry. So I send my wife to pick the truck up. She drives 15 miles home from the dealer and that’s it. When I got home from work I checked under the truck and it’s dripping coolant.
So a couple of things so far, executive GM has done not one thing to help me out. I have done everything myself. They don’t return calls and do not return emails. The last time I brought my truck in the dealer refused to give me any paperwork showing that they actually looked at it they just gave me paperwork from my previous visit.
He service advisor keeps telling me it’s burping out air and it’s residual coolant from the radiator replacement 4K miles ago and 2 months ago. I don’t know what to do. I have lost all respect for GM and their product.