About Us

 At Semi Friendly Truck Services, we take the hassle out of diesel engine diagnostics and electrical repairs by bringing expert mobile service straight to you. Based in San Marcos, Texas, we proudly serve truckers, construction companies, agriculture companies and fleets along the I-35 corridor from Austin to San Antonio. 

 With advanced diagnostics and electrical expertise, we quickly identify and resolve issues ranging from fault codes and wiring problems to complete electrical system failures. Whether you're on the road, at a yard, stuck roadside or stuck on a jobsite, we’ll get you back up and running—fast. 

 We know downtime costs money, so we focus on efficient, reliable, and professional service to keep your equipment  moving. Wherever you are, we’ll be there—because keeping you on the road is our priority! 

• Expertise You Can Trust: Our team of certified diesel technician has years of experience working on electrical issues  with all major truck and engine makes and models.  
• Fast and Reliable Mobile Service: We understand that time is money so we work quickly to get you back moving.
• Customer-First Approach: Your satisfaction is our priority. We take the time to understand your needs and deliver tailored solutions.