Review on Windshield Washer Fluid Reservoir Cap for Buick, Cadillac, Chevy, GMC, Chevrolet Models (Excludes Other Vehicle Makes) by Michael Luna

As described. Aluminum caps for diesel and def. Great quality with a snug fit but not tight enough to not be easy to remove. I love that the diesel engine cover is magnetic which makes it easy to attach to the throttle to reattach after refueling. Would buy it again if lost, but I think it's more realistic if it's stolen first. Also, within a day of purchase, I received a thank you email offering help and support for my item. Excellent these days.