[Capricio]

Originally Posted by olrocker

If it’s a manufacturing problem they should have the exact VIN numbers it affected, the repair or replacement with the upgraded crank, and verification all new production vehicles have the new crank from the factory.

You mean, like Toyota did on their trucks?

Nope, not the General, you get an extended warranty up to 150,000 miles and they call it a day. If you don't make it that far, they won't have a replacement for you, anyways.

Yes, General Motors has identified a specific manufacturing window and established diagnostic procedures for the 6.2L V8 L87 engine defects. However, regulatory bodies are currently investigating if the original identification and remedies were sufficient.

Affected VIN Identification
The manufacturing problem is linked to a specific production window rather than a single contiguous block of VINs, making it essential to verify individual vehicles.

Production Dates: The suspect components were manufactured between March 1, 2021, and May 31, 2024.

Affected Models: 2021–2024 Cadillac Escalade/ESV, Chevrolet Silverado 1500, Suburban, Tahoe, and GMC Sierra 1500, Yukon/XL.

Verification: Owners must use the GM Recall Center or NHTSA VIN Lookup to confirm if their specific VIN is included in Recall 25V-274.

Repair or Replacement Procedures
GM does not replace every crankshaft; instead, it uses a two-tiered remedy based on a dealer inspection.

Diagnostics: Technicians use specialized tools, such as the GM PicoScope (digital oscilloscope), to detect out-of-spec dimensions or vibration signatures.

Full Replacement: If the engine fails the inspection or shows signs of failure (e.g., ticking or metal debris), the entire engine is replaced with a unit manufactured after the June 2024 cut-off.

Partial Remedy: If the engine passes inspection, the "fix" involves a mandatory switch from 0W-20 to a higher-viscosity 0W-40 oil, a new oil filter, and a new oil cap.

Note: As of early 2026, the NHTSA has opened a query (RQ26001) because some engines that received only the oil change later suffered catastrophic failure.

Verification of New Production (2025–2026)
GM has officially stated that all engines produced after June 1, 2024, include the upgraded components.

Factory Improvements: GM implemented manufacturing improvements before the start of the 2025 model year to address "contamination and quality issues" in crankshafts and connecting rods.

2025 Model Year: Vehicles from the 2025 model year are not included in the original recall because they were built after these quality controls were implemented.

2026 Redesign: For the 2026 model year, GM has further updated the 6.2L L87 engine, including revisions to eliminate Dynamic Fuel Management (DFM) to address separate long-term reliability concerns.