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    2023 6.2L L87 Engine Defect Bulletin! Yukon/Tahoe/Escalade/Suburban/Sierra/Silverado

    Another recall I saw had numbers to call... Cadillac 1-800-333-4223 Chevrolet 1-800-222-1020 GMC 1-800-462-8782
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    2023 6.2L L87 Engine Defect Bulletin! Yukon/Tahoe/Escalade/Suburban/Sierra/Silverado

    No, but for prior years I've seen - 2022 Main Bearing Cap Bolt Defect, i.e. bad torque on the bolts, misaligns the crankshaft - 19-23 Oil Pump Defect, i.e. bad tranny-oil gears, bad oil pressure, bad lifter activation
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    AFM/DFM on 2022 Tahoe?

    Good News - It is Now Possible Bad News - You probably don't want to - Lifters are failing from parts outside DFM - It voids the warranty - Requires 20+ hours from a "very" experienced mechanic who can spot other defects that might be in the motor Lifters Failures Without DFM, from a GM Master...
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    Has anyone experienced this engine noise '21 or '22?

    Update! Sound Narrowed Down to Two Parts in the Exhaust Line 1. Flapper Squeak (easy fix, see below). - Locking the flapper open stopped the very-high squeak on my 23 Yukon 6.2L L87. - First check if your flapper squeaks by quickly rotating it (hot part, wear gloves) - Take a video to see...
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    2023 6.2L L87 Engine Defect Bulletin! Yukon/Tahoe/Escalade/Suburban/Sierra/Silverado

    GM did not notify me, but my VIN was on the list. You have to call and ask. Sent out in April 2024: https://static.nhtsa.gov/odi/tsbs/2024/MC-10253536-0001.pdf 2023 L87 ENGINE-GAS, 8 CYL, V8, 6.2L, DI, DFM, ALUM, GEN 5 Cadillac Escalade Cadillac Escalade ESV Chevrolet Suburban Chevrolet...
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    Has anyone experienced this engine noise '21 or '22?

    Found a video of the flapper delete on the 6.2L L87, the sound is gone after delete. I'm going to try forcing it stay open.
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    2023 Yukon Denali - 1700 miles failed engine

    More people need to know about this bulletin, GM has not notified any owners. My block failed at 29K. https://static.nhtsa.gov/odi/tsbs/2024/MC-10253536-0001.pdf
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    Engine Issue 2023 Yukon Denali 6.2L only 4k miles

    Most states require the vehicle in the shop for 30 days to be eligible for lemon law. I just went through this, full block replacement at 29K miles. Total time in the shop was 3.5 weeks, 2.5 block backorder wait, 1 week repair time. I think more 2023 L87 folks should be aware that a bulletin...
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    Has anyone experienced this engine noise '21 or '22?

    My brand new 23 Yukon Denali Ultimate has this sound. Asked about it on the lot, they said they all do that under 1500 RPM. Slightly jerky 2nd gear on acceleration too (pedal 30-40% down). Will poke around, sounds more like exhaust system than belts to me.

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