Johnny's Auto Service
- Honest
- Compressor
- Review
24 mechanics listed · 16 in Covina · 14 open weekends · 16 rated 4.5+ · 1 shows a license
Data verified October 16, 2026
Listed for drivers in and around Covina, CA, these 24 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.

Of the 24 mechanics we list here, 16 are in Covina itself and 8 come from towns including Chino (2, 14 mi), West Covina (1, 3 mi) and Glendora (1, 4 mi). The mechanics on this page are rated from 4.2 to 5.0 across 2,511 reviews; 15 have 50 or more reviews and 16 are rated 4.5 or higher. The topics that come up most in reviews of the mechanics on this page are "price", "honest" and "fair". 14 are open on Saturdays and 1 on Sundays. The services the mechanics on this page list most often on their websites are alignments (2), brake services (2), check engine light (2) and oil change (2). 1 shows a license on its website; 3 list staff certifications (ASE) and 10 have a BBB rating of A or A+. 19 have ten or more years of experience, the longest 43 years. 2 offer financing; 1 gives free estimates; 5 are family- or locally-owned and 7 list coupons or special offers. 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.
14 of the 24 shops on this page run a weekend shift. Weekend slots are how a lot of fleets get preventive maintenance done without losing a working day, so they book out early. Parts counters keep shorter hours, which is the usual reason a Saturday job waits until Monday.