General Motors is recalling certain Chevrolet Silverado medium-duty trucks for model year 2019 or later. The company has discovered a potential leak in brake fluid that could result in a fire. Until the recall repair is done, GM advises owners to park outdoors. Possibly 40,428 vehicles could be affected.

They include 4500HD, 5500HD, and 6500HD models with model years between 2019 and 2023.

Stocks finished with slight gains on Wall Street as investors closed out a quiet week highlighted by a batch of mostly mixed corporate earnings reports. The S&P 500, Dow Jones Industrial Average and Nasdaq all gained 0.1% Friday. Among the companies that reported results, hospital operator HCA Healthcare rose after raising its full-year profit outlook, while consumer products giant Procter & Gamble gained after its quarterly profit beat estimates.

Rail unions want railroads to take some of the billions they’re using every year to buy back their stock and use it to improve safety in the wake of several high-profile derailments and hire more workers.

The 12 unions said Friday that collectively the six biggest freight railroads spent over $165 billion on buybacks — well above the $119 billion they spent on upgrading and maintaining their track and equipment between 2015 and last year. At the same time, their safety record worsened as they overhauled their operations to cut costs and eliminated nearly one-third of all rail jobs.