GM Genuine Parts GT264 Locking Quarter Turn Fuel Tank Cap - Secure Fit

In this review of the GM Genuine Parts GT264 locking quarter turn fuel tank cap, the bottom line is simple: it is for drivers who want a direct replacement that restores factory fit and helps deter fuel theft. The reviewer finds the cap offers the most value when replacing a worn or missing OEM fuel cap on compatible GM vehicles because it is manufactured to GM OE specification and aims to eliminate fuel system warnings. It is a practical, no-frills replacement that prioritizes fit, durability, and basic security.

Key Features

• Tight seal: Engineered to provide a reliable seal for the vehicle fuel tank to help maintain evaporative emissions control and reduce odor.
• Locking design: Includes a locking mechanism and two keys to deter casual fuel theft and unauthorized access.
• GM OE quality: Manufactured to GM Original Equipment specification for consistent fit, form, and function on recommended GM vehicles.
• Direct replacement: Intended as a GM-recommended replacement part to match the original factory component and simplify installation.
• Durability: Built to offer the quality and reliability expected from GM Genuine Parts for routine use and exposure to fuel and weather.

Who It's For

This cap is well suited to owners of GM vehicles who need an exacting replacement for a lost or damaged fuel cap and who prefer OEM-spec parts to preserve fit and system performance. It is especially useful for those who experienced a check engine light caused by a faulty cap and want to restore proper sealing and venting.

Drivers looking for advanced anti-theft technology or a universal aftermarket part for multiple brands should look elsewhere; this product is designed specifically as a GM OE-style replacement and its locking mechanism has received mixed feedback from some users.

Pros & Cons

Pros

• Provides a proper OEM-spec seal that helps prevent check engine light issues linked to fuel cap leaks.
• Includes a lock with two keys, offering a basic deterrent to fuel theft and unwanted tampering.
• Good overall fit and finish that matches factory components and simplifies installation.
• Represents solid value for a genuine GM replacement part backed by original equipment standards.

Cons

• The locking mechanism has received mixed reports, with a minority of users experiencing durability issues over time.
• Not a universal cap; intended specifically for recommended GM vehicles, so fit depends on correct application.

Specifications

Brand	GM Genuine Parts
Model	GT264 (25862765)
Type	Locking quarter turn fuel tank cap
Keys included	2 keys
Color	Black
Fitment	Manufactured to GM OE specification for compatible GM vehicles

Our Verdict

The GT264 locking fuel cap is a sensible purchase for GM owners who need a faithful OEM replacement that restores a secure seal and can resolve fuel cap related warning lights. It offers strong fit and build quality typical of GM Genuine Parts and good value, though buyers should be aware the lock has mixed reviews and treat the security feature as a deterrent rather than high-end protection.

Frequently Asked Questions

Will this cap fit my GM vehicle?
It is made to GM OE specification and intended as a replacement for compatible GM vehicles; confirm fitment with your vehicle year and model before purchase.

Are keys included?
Yes, the cap ships with two keys so you can lock and unlock the cap as needed.

Will it stop a check engine light?
Replacing a faulty or loose fuel cap with this OEM-spec unit can resolve evaporative emissions system warnings that are triggered by a poor seal.