Crankcase (pcv) Problems of GMC Sierra 1500

2020 GMC Sierra 1500 at4, 3. 0l lm2 duramax. In service 08/13/2020. Five glow plug failures on five different cylinders in under 19,000 miles, all at one gm dealer, all part 24000504: cyl 1, 10/21/2024, 38,650 mi, p0671, ro 13714, warranty. Cyl 6, 11/05/2024, 38,793 mi, p1330, ro 26665, warranty. Cyl 4, 11/29/2024, 39,683 mi, p133b, ro 57498, warranty. Cyl 3, 01/22/2026, 52,959 mi, p0673/p06c7/p133a, ro 100951, I paid $713. 38. Cyl 2, 08/26/2026, 57,466 mi, p06c6/p0672/p1339, ro 115953, gm under n232430460. The first three came within 39 days and 1,033 miles. Every ro documents the same finding: high internal resistance in the plug, circuit tests good. The failure is internal to the plug. Glow plug failure on a diesel causes hard starting, extended cranking, no-start in cold weather, and startup misfire - risk of being stranded or unable to start. Gm has documented this defect three times: pip5762 (12/2020), TSB 22-na-027 (2/2022), special coverage n232430460 (1/2024). All name an inadequate camshaft housing cover baffle plate weld, and all limit the remedy to cylinder 2. On the recorded walkaround for ro 115953 the tech stated my engine serial falls inside the affected population and my earlier failures were probably the same condition. Gm replaced only the glow plug. The camshaft cover gm identifies as the cause is still installed; gm quoted me $5,100 to replace it at my expense. Four of five failures were on cylinders 1, 3, 4 and 6, outside that scope. If the bad weld passes oil into the pcv and intake path rather than only the cylinder 2 glow plug well, ingested oil would reach other cylinders. No ro shows anyone inspected the intake tract, charge piping, cooler, pcv separator, a removed plug, or a glow plug well. I ask odi to examine whether the cylinder-2-only scope of n232430460 is under-inclusive, whether replacing the plug while leaving the cause installed is an adequate remedy, and whether repeated internal failure of part 24000504 warrants a recall.

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Transmission failed, value body is listed by dealer as the cause. GMC is saying that my vehicle is not part of the recall, even though it is part of the same model, same years as well as the same problem, the value body on the transmission. See estimate from dealership tucks GMC hudson, MA transmission replacement with bypass valve $6800. 00 radiator replacement leaking $1980. 00 abs traction light wheel speed sensor $395. 00 check engine light is on needs pcv valve hose and solenoid $430. 00 oil leak between engine and transmission ?.

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I own a 2007 GMC Sierra 1500 crew cab. I have some issues when I start my truck in the mornings, I get a tapping noise as if there are lifters stuck or not getting suffiicient oil. I have always used the recommended ac oil filters that I purchase from the local dealership parts center so I know that the filter is not the problem. I am a mechanic so I know what an engine is supposed to sound like. The noise will continue until the engine warms up which is approximately 10-15 minutes ans is very annoying. I am currently deployed to kandahar, afghanistan in support of operation enduring freedom and schedule to return to the us in late March 2012. I spoke to my wife today and she said that every time she start the vehicle for the first time the noise is there. I would appreciate if you could answer my question concerning this issue. I like the truck but the engine noise has to go. Like I said befor I have been a mechanic for over 30 years on construction equipment and automotive equipment for the us army. Please do not try to give me a short answer to try to get rid of me, I know better. The crankcase is full of oil to the correct level on the dipstick and I use the recommended 5w30 oil. Why am I having this issue? note: I am deployed so please don't try to contact me by phone.

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