We are vehicle upfitters that install and sell truck and special vehicle systems and parts. Having the ability to upfit small to large truck. We work with individual to large national fleet accounts. Factory trained, ASE Gold Master Technician, and OEM Master Technicians at our facility can install any equipment to meet your needs.

We are also top leaders in alternative fuel conversions. With consultation, parts, systems and installation for CNG and LPG availible.

Grimhall Vehicle Upfitting now offering EPA Certified Installations

We are very proud to announce that Grimhall Vehicle Upfitters is now installing EPA certified conversion kits By AGA Systems for Chevrolet, Cadillac, Buick and GMC Vehicles. Check out AGA's website for a list of compatible vehicles:

Designed here in Utah, manufactured in North America and employing the bleeding edge of modern automotive technology, we are not exaggerating when we say that AGA Systems Inc. is manufacturing the best bi-fuel conversion on the planet. Engineered from the ground up specifically for each application and the best use of General Motor's family of Ecotec 3 direct injection engines. AGA Systems are a no compromise Bi-fuel conversion built specifically for reliability, seamless operation, and the best and lowest emissions from the tailpipe of any bi-fuel vehicle. 

We have had first hand experience with almost every type of conversion available. After working with the AGA hardware we were blown away by the obsessive attention to quality. All items are as good as or better then factory quality for any automobile manufacturer's standards - which is of course backed up by a 2 year warranty on most installations.  This is the absolute best protection for your investment. Less downtime. Less repairs. More saving money and keeping the air clean. 

Call or E-mail Grimhall Vehicle Upfitters or AGA Systems Inc. and get a quote for your vehicle or fleet. All EPA conversions are qualified to receive state incentives, which at the moment is about $1500 in Utah. Don't wait until gasoline is $4.00 per gallon, start saving today!

Grimhall Vehicle Upfitters Moving!

Good afternoon guys and gals, we just wanted to give an update about our location. Our Office and shop is now in Layton, as shown on our website heading. We are still setting up but we can schedule pick up on certain items and alternative fuel products, and can ship as well. We expect to be operating at near full capacity right around may first. 


Well, our last location in an industrial complex was not conducive to the image we are trying to cultivate and was just plain not customer friendly. Our new spot has a nice show room and very easy access from the freeway. 

We'll make the announcement when the dust clears and we'd love to see our customers come and check out the new digs. Thanks for reading!

Website is currently under construction!!! Things will be changing around quite a bit...please bear with us while we finish the job!