Chevrolet, GMC, & Cadillac may have built vehicles powered by 6.2L V8 engines with a big problem.  The solution? Replace the entire engine.

In April, General Motors Released “Customer Satisfaction Program N232413430 – “Oversized Lifter Bores”. While not technically a recall, the program aims to fix an issue where an unknown number of 6.2L engines were incorrectly manufactured.

The L87 6.2L engine is a well known engine produced by General Motors, valued for its performance and reliability. It has a lineage tracing back decades, showcasing GM’s ongoing commitment to overhead-valve V8 engines. In the 2024 model year, the L87 maintains its reputation for robust performance and modern features. With a rating of 420 horsepower and 460 lb-ft of torque, it offers strong acceleration and towing capabilities. It is utilized across various vehicles within the Chevrolet, GMC, and Cadillac lineups, including the Silverado, Sierra, Tahoe, Suburban, Yukon, and Escalade models. Whether for towing, off-road capability, or highway cruising, the L87 engine offers the power and dependability expected from a GM V8 engine.

N232413430 – Oversized Lifter Bores – Vehicles Included

All vehicles listed below were built with the L87 6.2L V8 gasoline engine:

  • 2023 Cadillac Escalade
  • 2023 Cadillac Escalade ESV
  • 2023 Chevrolet Suburban
  • 2023 Chevrolet Tahoe
  • 2023 Chevrolet Silverado 1500
  • 2023 GMC Sierra 1500
  • 2023 GMC Yukon
  • 2023 GMC Yukon XL

N232413430 – Oversized Lifter Bores – The Problem

GM has identified that some 6.2L V8 L87 engines were manufactured incorrectly. The problem may not indicate an issue or cause drivability issues up front- but will certainly affect long term durability.

Specifically: “Certain 2023 model year vehicles listed above, equipped with ENGINE-GAS, 8 CYL, V8, 6.2L, DI, DFM, ALUM, GEN 5 (RPO L87), may have a condition in which the engine lifter bores may be oversized.”

N232413430 – Oversized Lifter Bores – The Solution

There is only one solution to this issue- replace the entire engine.

Affected vehicles in dealer inventory, new or used, must have the engine replaced before they can be sold.

GM allocates the following Labor times for the procedure”

  • Silverado & Sierra – 19.8 hours
  • Tahoe & Suburban – 19.4 hours
  • Yukon & Yukon XL – 19.8 hours
  • Escalade & Escalade ESV – 19.6 hours

Engines used for replacement must be specially ordered by dealerships and allocated to specific VIN numbers. Dealers may not order spare engines for stock, as some parts are limited and a certain number of new engines are allocated to this program specifically.

Owners will be notified by their dealerships and/or via letter.

Read the Customer Satisfaction Notification Here

General Motors will offer this engine replacement program until May 31st, 2026.