Taking Care of you and your vehicle with courtesy and commitment. At Allegiance Automotive, we love cars & trucks, and spend every day repairing and maintaining vehicles in our Boulder, Colorado location. We believe in full service car care and superior customer service.
The key to vehicle health and car owner happiness, our experts provide the full spectrum of factory maintenance.
Let our genuine diesel experts repair your Powerstoke, Cummins, Duramax or any other engine without spark plugs.
Ford specialists who gladly repair all makes and models
Blowers, Cams, nitromethane, 4 link suspension, tubbed rear ends and all other things streetrod.
Providing Quality Service and Repair for Your Vehicle
We service all your automotive repair and maintenance needs. From your family or sports car, trucks, and classics, Allegiance Automotive has the ability to service most vehicles, including gas and diesel engines.
Cant be happier with my experience. We bought a used school bus to convert into a tiny home and Allegiance took it in and made sure it was worth building out as well as some routine maintenance that had not been done in years. She drives great now, thanks, Allegiance! 6/14/17
Solid shop. I had been working with another local shop and wasn’t pleased with the service and these guys blew me away. They’re genuine, kind, straight-forward, and they display excellence in their work ethic. I’m a fan!
These guys are great! I recommend going to Allegiance Automotive over ANY other shop! They took every opportunity to ensure I was satisfied, kept informed, and inquired where they could do better. Don’t waste your time anywhere else! I was returning to Boulder on a 1300 mile road trip over the holidays, and my truck broke down just as I was passing Denver. The whole situation seemed bleak. It was New Years eve, I had significant plans the next day,…
These guys are great! I was returning to Boulder on a 1300 mile road trip over the holidays, and my truck broke down just as I was passing Denver. The whole situation seemed bleak. It was New Years eve, I had significant plans the next day, and I was stuck with very little options. I contacted Allegiance Automotive and spoke with the manager Jim. He recommended a great towing company that really worked with me to get my truck to…
My husband and I purchased a salvaged vehicle last year, we knew there might be some issues so we also purchased a warranty. However, when the car started giving us problems we really didn’t know who to turn to. Luckily we were paired with Bob and his team at Allegiance Automotive through a referral and we are so thankful! We brought our car in for them to look at, they did a very comprehensive review of the car and found…
I have been a loyal customer of Allegiance Automotive for years. I always receive excellent customer service and car repairs. The staff on more than one occasion has been able to accommodate me with emergency repairs. I would rate this auto repair shop 5 stars.
Simply put…these guys are the best. They have given me excellent service for the past 8 years. They are consistent and most importantly honest. Bob and his team are top notch. Boulder is lucky to have them.
I thought working with Bob & Caitlyn at Allegiance Automotive was great. They did a great job answering every single one of my questions in fine detail. I thought the prices were fair and they were always very responsive. They fixed my car as concisely as possible and they guarantee their work for a year.
Awesome, trustworthy place to take your car. I would recommend them to all of my Boulder friends.
Service was prompt and professional. I’ve taken my vehicle there twice now and I am very happy with the quality of work done.
These guys are great to work with. They were able to diagnosis and fix a very tricky issue I was having with my brakes and ended up not charging me for the extra expenses it took to figure out what was going on. I’ll trust these guys with all my future repairs. They are a small independent shop so they can get backed up with work but they really know what they’re doing and they value your business. I can’t…
Bob Ralph and his team at Allegiance Automotive in Boulder have given me the best service I’ve ever had in my 50 years of owning cars. Bob is a knowledgeable and hands-on owner. His wife Charlene often is there to talk and work with customers. His team does great work at a very reasonable price. I’ve have always gotten good recommendations on the work I needed done and the estimates were right on the money. Most of all, I have…
I own a construction company; as a result, I have a small fleet of neglected trucks. Since switching to Allegiance Automotive my maintenance costs have gone down and my down-time due to service has gone down. They are efficient, trustworthy, and good. I recommend them to anyone.
At Allegiance Automotive, we know that muscle cars are an international symbol of American automotive brilliance. From the Corvette to the Mustang to the GTO, these powerful, beautifully-designed vehicles are always the focus of attention. The acoustics produced by American muscle cars is one of the most highlighted features of this vehicle class. Many classic […]
Over our years of experience working with classic cars and trucks, we’ve seen how people of all technical backgrounds can have issues with their vehicles. As a Boulder, Colorado business, Allegiance Automotive is incredibly proud of the rugged terrain our great city has to offer – but we’re also well-aware of the problems it causes […]
So you finally bought a project car. Congratulations! Soon you will be roaring down the road. But first, you need to get started on your muscle car restoration. Chances are, you’ll need some help along the way. After all, bringing a vehicle back to its former glory takes a lot of different skills. Muscle Car […]
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