From check-engine lights to complete in-frame overhauls, our technicians diagnose and repair diesel truck engines quickly so your truck spends less time in the shop and more time earning.

Your engine is the most expensive component on your truck, and small problems can turn into major failures if they are ignored. At DTTR Inc we start every engine job with a thorough inspection and computer diagnostics, so we fix the real cause of the problem instead of guessing.
We work on heavy-duty diesel engines in Freightliner, Peterbilt, Kenworth, Volvo, Mack and International trucks. Whether you need a sensor replaced, a cooling system repaired or a full engine overhaul, we explain the issue, give you an upfront estimate and get the work done with quality parts.
A check-engine or derate warning should be diagnosed before it becomes a breakdown.
Black, white or blue exhaust smoke can point to fuel, coolant or oil problems.
Poor pulling power on hills or slow acceleration often means a turbo, fuel or air issue.
High coolant temperature can damage the engine quickly and needs prompt attention.
Oil or coolant leaks and rising oil consumption are early signs of wear.
Unusual knocking, ticking or rattling from the engine should be inspected right away.
We read fault codes and test the engine to find the real cause.
You get a plain explanation and upfront price before work starts.
Our technicians repair or rebuild using quality parts.
We test the engine under load before handing the truck back.
Breakdowns don't wait for business hours — and neither do we. Call our team any time and we'll help get your truck moving again fast.
+1 (661) 401-6001




We repair heavy-duty diesel engines in all major makes, including Freightliner, Peterbilt, Kenworth, Volvo, Mack and International trucks.
Simple repairs are often completed the same day. Larger jobs such as overhauls depend on the work required and parts availability, and we give you a time estimate before we start.
Yes. After diagnostics we explain what we found and give you an upfront estimate. No work is done without your approval.
Yes. Call +1 (661) 401-6001 for emergency roadside support and our team will help get your truck moving again.