Auto Squad DB
“Matt gave me the best prices and the service is absolutely second to none.”
Best Truck Repair near Diamond Bar, CA
We have 2 mechanics in Diamond Bar on file, and both are on this list, along with 13 from towns including Chino (2, 9 mi), Anaheim (2, 11 mi) and Ontario (2, 12 mi).
6 open weekends · 14 rated 4.5+
Data verified October 16, 2026
Diamond Bar Auto Service & Body
“The owner is kind and works honestly.”
The Care Shop
“Mark and his team of expert technicians get right into your car repairs, and you can rest assured that the price is fair and quality of work is excellent!”
Stress-Free Auto Care
“The staff are honest, professional, and genuinely try their best to repair your tire instead of upselling you on a new one.”
Domestic Diesel & Auto Service
“They did a great job , and I would recommend them to anybody”
B & D Auto Repair
“My wife & I have been bringing our cars here for years.”
Listed for drivers in and around Diamond Bar, CA, these 15 shops work on medium and heavy duty trucks. What each one says about fleet accounts, road service, inspections and hours comes from its own website; ratings and quotes come from public reviews.
Area overview: Diamond Bar, CA
The 15 mechanics on this page are rated from 4.3 to 4.9 across 5,163 reviews; 14 have 50 or more reviews and 14 are rated 4.5 or higher. The topics that come up most in reviews of the mechanics on this page are "honest", "price" and "fair". 6 are open on Saturdays. The services the mechanics on this page list most often on their websites are wheel alignment (3), alignments (2), auto repair (2), brakes (2) and check engine light (2). 4 list staff certifications (ASE) and 10 have a BBB rating of A or A+. 14 have ten or more years of experience, the longest 37 years. 3 offer financing; 1 gives free estimates; 4 are family- or locally-owned and 8 list coupons or special offers. We have a website on file for 13 of the mechanics on this page; 10 publish a contact page; 7 list a public email and 6 take bookings online. We count these figures across the mechanics on this page; distances are straight-line, and hours and prices change, so confirm the details with the mechanic before you visit.
Why does this page include shops beyond Diamond Bar?
2 of the 15 shops sit inside Diamond Bar; the rest come from other towns. Truck shops need land, long approaches and highway access, so they end up on the edge of town. Drivers already plan around that.
小李修車廠 KB Motor
“He patched it within 20 minutes and I was back on the road!”
Lupe's Auto
“He explains the situation and doesn't try to sell you anything over what needs to be fixed.”
Pomona Tire Pros Repair Shop
“Their pricing is abundantly fair and never deceptive and the turnarounds for same-day repairs are usually pretty fast.”
R & N Complete Auto Repair
“Mark was the one who helped me and he was very polite didnt try to sell me on trying to get other things fixed, and got my car in and a few hours later was able to pick it up.”
Johnny's Auto Service
“It's a family owned business for many years with his wife and daughter working along his side daily”
Comtires
“I immediately felt the difference in the steering and suspension performance.”
Community Tire & Auto Service
“I was pleasantly surprised to get same day service!”
Anaheim Wheel & Tire
“Everyone I come in contact at the store is wonderful.”
Yorba Linda Auto Service
“They were able to take care of the issue and my car drives great now.”
Why these companies made our list
What customers say about mechanics near Diamond Bar
- “They were very professional and kind. They have a very inviting shop that made me feel confident about leaving my truck here for service.” — customer of Yorba Linda Auto Service
- “John and his crew at Domestic Diesel are hands-down, the most knowledgeable and honest diesel mechanics anywhere.” — customer of Domestic Diesel & Auto Service
- “Eric is super knowledgeable. He made sure I understood the problem with my truck before agreeing to anything.” — customer of Lupe's Auto
- “They always kept me updated on the truck with no pressure from them that I had to do work or extra work.” — customer of Yorba Linda Auto Service
- “I highly recommend Domestic Diesel. They definitely go above and beyond for their customers.” — customer of Domestic Diesel & Auto Service
Excerpts from public reviews of the mechanics listed on this page.
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