EngineNoO9

Ours has the updated camshaft housing and they replaced it with the same exact one. They’d said they were hoping for a leak as that’s be easier to explain. The glow plug issue was tied to the camshaft housing cover TSB. Glow Plug #2.

we’ve had 3400 trouble miles with multiple CELs but all related to the same issue. Driveability and mileage has been great. Not really following what you’re saying about stories. As an engineer the PCV seems to be the only thing that makes sense but that’s us just bs’ing cause both parties are frustrated. They’ve had to bend over backwards to try and help us out in a vehicle that shouldn’t need any work. They want to avoid a buyback as much as we do but I also draw a line in the sand with a full motor swap on a vehicle this new that I paid that much for. Talking with the Service Director (2nd only to the GM), he’s been very up front to us. The techs had never done this job before and have definitely never engine swapped. Doesn’t make me feel warm and fuzzy. Unfortunately the engineers at GM aren’t saying anything either but it appears that whatever is wrong in our specific motor is definitely a fluke.

My ‘07 avalanche with the 5.3 has 210,000 miles on it and maybe burns a qt every 5000 miles. Mostly if I heavy highway drive. It is what it is. The diesel doesn’t have AFM. They seem to be grasping at straws though the thought is there’s something with the PCV. Maybe…

Bought a brand new 2022 suburban with the 3.0 duramax in July and we’ve had major oil consumption issues. At 1500 miles it was down 4.5 quarts and the low oil pressure code got thrown. Initial assumption was the dealer may have forgotten to check oil at the pre delivery inspection. Did an oil consumption test and at 700 miles we were at 2.5 quarts down. Dealer is working with GM and they replaced the camshaft housing cover even though it already has the “updated” one. It also fried the number 2 glow plug which was replaced. The service director seems doubtful that the “fix” Will correct the issue. From what we’re being told they haven’t seen this on the corrected camshaft housing covers. Our dealer had never even replaced one before. If it fails the next oil consumption test we’re likely looking at buyback. I told them I don’t want a new motor. Not for as much as this cost. I’d rather start over at zero. Anyone else see this level of oil consumption? We love the diesel and will likely get that option again. Just frustrated with this one.

Got my answer. Was told they’d just replace everything out of precaution as they don’t know what the trans May or may not have digested so far. It sounds like it could be salvageable but not worth the fuss when throwing in a reman. $4-5k repair…. Ouch!

So question, if your trans is starting to do the bucking/slipping and fluid is burnt, is the trans salvageable or is it toast at that point? My suburban just started and was gonna take it in. Shop has been in business since 1971 so they know they’re stuff but curious if there’s any hope of not replacing the whole thing.