What automatic transmission is used in the Buick GL8?

[Caleb]

Before the 2011 model year, the Buick GL8 was equipped with the GM 4T65E electronically controlled automatic transmission across all trims. After the 2011 model year, it switched to the Aisin six-speed automatic transmission with manual mode. Below are the maintenance methods for automatic transmissions: 1. After every 50,000 kilometers of driving, connect the equipment to the vehicle's power source and use the provided adapter to link the equipment to the transmission cooling line. Then, with the engine idling, add automatic transmission cleaner, press the brake pedal, and cycle through each gear of the automatic transmission to remove harmful deposits. Subsequently, use the equipment to perform a complete replacement of the automatic transmission fluid. 2. Add automatic transmission protector to the transmission at a ratio of 5%. For older vehicles, it's advisable to add a bottle of automatic transmission leak stopper to rejuvenate aging transmission seals and prevent leaks.