Cadillac STS transmissions

At Car Part Planet, we're committed to giving you unbeatable value without compromise. Find a comparable engine or transmission elsewhere, matched on tax, shipping, core return policy, warranty, labor coverage, and mileage terms, and we'll match or beat that price. We stand behind our pricing and our product quality, so you can shop with confidence knowing you're getting a top-tier remanufactured engine or transmission at the best possible price.

For remanufactured engines and transmissions, we keep our prices low by requiring the return of your original engine and or transmission, known as the core. Once your remanufactured unit is installed, simply contact us to schedule FREE core pickup, we cover the shipping both ways! Returns must be scheduled within 30 days. If you selected the “Waive Core Charge” option at checkout, your card will only be charged if the core isn’t returned. Need more time? Just reach out. Remember: your warranty depends on returning the core.

Enjoy fast, flat-rate shipping anywhere in the continental U.S. Your used or remanufactured engines and transmissions ships quickly, usually arriving within 7 business days, to any commercial address. Residential or liftgate deliveries incur a $99 fee. Every unit is fully tested before shipment. Please inspect your delivery upon arrival and report any damage immediately, we’ll work with you to make it right.

Our nationwide, no-hassle warranty is among the best in the industry. Unlike many competitors, our engines and transmissions include a no-fault warranty, no extra charge. Coverage is fully transferable, includes parts and labor at certified repair shops, and offers instant replacement if needed. Coverage lasts up to 5 years/unlimited miles for personal use, and 3 years/unlimited miles for commercial use (depending on the unit). We’re with you every step of the way to ensure fast, successful resolution of any warranty claim.

Our used engines come with up to a 5 year / 50,000 mile parts only warranty.

Our used transmissions come with up to a 1 year / 6,000 mile parts only warranty.