INDIANA – General Motors has announced a new Customer Satisfaction Program (CSP N252508800) for select 2025 GMC Sierra 1500 pickup trucks. The program, launched on June 24th, 2025, addresses an issue concerning improper lubrication of the truck’s rear axle assembly.
While not classified as a safety recall, this CSP aims to mitigate potential long-term durability concerns related to the rear axle. To rectify the issue, GM is instructing dealerships to perform full rear axle replacements on affected trucks, at no cost to the owner.
The required service involves installing a new rear axle assembly, utilizing either part number 85632399 (GU5) or 85632400 (GU6), depending on the specific vehicle configuration. The labor time for this replacement is estimated at approximately 3.6 hours.
The program’s coverage extends to vehicles in new, used, Certified Pre-Owned (CPO), and courtesy fleet inventories, and will remain in effect through July 31st, 2027. Dealers are mandated to verify a vehicle’s eligibility through GM’s Global Warranty Management (GWM) system prior to performing any repairs.
Owners of impacted 2025 Sierra 1500 trucks will receive an official notification via mail. GM strongly encourages these owners to schedule a service appointment with their local dealership as soon as possible to ensure the necessary fix is applied. It is important to note that not all 2025 Sierra 1500 units are affected by this CSP, and VIN-specific verification is required to determine eligibility.
The exact number of 2025 Sierra 1500 units impacted by this CSP has not been disclosed. This Customer Satisfaction Program also extends to the Sierra 1500’s counterpart, the Chevrolet Silverado 1500.
In related news, General Motors is preparing for the highly anticipated debut of the next-generation GMC Sierra, slated for the 2027 model year. This upcoming redesign is expected to feature the all-new Gen 6 Small Block V8 engine, promising improvements in fuel efficiency, horsepower, torque, and noise, vibration, and harshness (NVH) characteristics. Prototype testing for the next-generation Sierra is reportedly already underway, with further updates expected in the coming months.
