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gm 3.0 diesel oil overpressure problems. Dealing with GM factory goons

9.2K views 13 replies 9 participants last post by  DavidTree  
#1 ·
I recently purchased a 2024 Silverado 1500 with the 3.0L diesel engine. After a 5 month wait for the truck, I happily gave the dealer a $63,000 check and drove off.

With about 1,500 miles on the odometer, I set off the Las Vegas from Upstate New York to attend the 2024 consumer electronics show, CES. Cruising through the first 1,100 was great except for the Adaptive Cruise Control. It sucks, you ping pong between the lane lines. But was getting 27MPG

A bit north of Oklahoma City the truck went into some kind of limp mode. The info panel really told me nothing and the check engine light was on. Time to see if OnStar is worth something. I asked if I could talk to someone technical so, believe it of not, connected me with a Ford dealer. So, I gave up on that. I managed to limp into a dealership just a few miles away. The service guy said it was most likely a poor sensor connection and to get it fixed in Vegas. I did check the oil and nothing was showing on the dip stick. I purchased 3 quarts of oil, and it took it all to have oil show up in the dip stick. Dealer guy said, “no worries just breaking the engine in”.
Fast forward about 100 miles now south of Oklahoma City same issue appeared.
I pulled off and into a near buy dealership in Weatherford, OK and checked into a hotel for the night. In the morning the guys at Commins GM were great. They spent 5 hrs. trying to fix what turned out to be a major oil leak. Thinking we had it fixed they sent me off with an extra case of oil just in case.

Fast forward about 100 miles
Same issue reappeared.
After a good amount of haggling of where to tow it to, I did not want to go a small-town dealership, it was towed to Amarillo, TX and checked into a hotel and bought airline tickets to Las Vegas. I have several business appointments at CES.
Once there I had to rent a car.

Issue 1, The dealer had to have a factory rep fly in to help find the issue. The front main seal had failed.
After getting the part and replacing the seal they discovered another issue.

Issue 2.
It turned out that an oil control valve failed. It controls the oil pressure. So, hi pressure oil had been running through the lubrication system. They are currently waiting for the part.

The result of the oil over pressure most likely caused the front main bearing seal to fail. GM fails to see the longer-term issue of over pressure, weakened internal seals and other parts as a result of extended overpressure.
As a result of this engine failure, I have incurred over $3,000 of expenses and more accumulating daily.
GM response is, “we will deal with it after you get your truck back”. Oh, and he kind of offered me and extra 1,500 miles of my drive train warranty.
I am assuming when I get the truck back, I will not hear from them at all.
Options
  • Have them buy the truck back and buy a new one?
  • Double my drive train warranty as the engine is in a potentially weakened state as a result of oil over pressure.
Any ideas?
 
#2 ·
Luckily since there is no bank involved, I would keep the truck until GM customer care gets you reimbursed (expect 80% reimbursement, will save you from being upset when they inevitably agree to a lesser amount). If you put any of this on an AMEX Plat, black or delta reserve (or other travel card) you might be eligible for their trip protection/interruption policy. If eligible, it may close GMs gap.

If it were me, and once that was set, I would stand firm in asking for a new vehicle. If you are enough of a thorn, the dealer may just suck it up and GM can offer subsidized "trade assistance". Which is basically a combination of hush money, and makes up the differential caused by the dealers low trade value.

As long as you didn't get a "low oil" alarm, I wouldn't be overly worried. It's definitely a shame to experience that in a brand new truck, but it is fixable and unlikely to have caused lasting damage.

If the low oil alarm did come on, I would get my reimbursement and then park myself in the dealer's GM's office until I had a resolution I could accept.

It may be worthwhile mentally, to assign a small loss to the transaction if you swap out. Sometimes paying $500-$1,000 is easier than the amount of arguing it would take it save it.


my .02
 
#6 ·
With about 1,500 miles on the odometer, I set off the Las Vegas from Upstate New York to attend the 2024 consumer electronics show, CES. Cruising through the first 1,100 was great except for the Adaptive Cruise Control. It sucks, you ping pong between the lane lines. But was getting 27MPG
Did you mean 'supercruise' rather than adaptive cruise?

Adaptive cruise manages speed, not steering.
It will maintain distance (time actually) behind a vehicle ahead, as long as the vehicle ahead doesn't run faster than the speed the adaptive cruise is set at.

'Lane keep assist' will help keep you from crossing a lane marking if the blinker hasn't been turned on, but it is not designed/intended to steer the truck.
 
#10 ·
I can no longer afford the fuel to feed one or the repairs for the rest of the rig....

Besides, I'm pretty sure you can find example horror stories for Quadrajets too!
 
#11 ·
I have a 2022 Silverado with the 3.0 and 55,000 miles on it. I just recently had the oil solenoid valve break off and is at the bottom of the oil pan. The dealership has had it for 2 weeks now waiting on a new oil pan. Have you had any other problems with you truck once it was fixed?
The valve broke off while driving normal 55 mph on a back road. I didn't have any oil leaks but my oil pressure would sit at 30psi like normal but would jump to 60 and 90 when accelerating quickly. I had an oil change done and the valve broke off the next day. Anyone have any thoughts how it would have broke off?