SERVING NORTHERN COLORADO · Fort Collins · Loveland · Windsor · Timnath · Greeley Open until 5:30 PM · (970) 224-2824

Cummins repair in Fort Collins.

RAM 2500 and 3500 Cummins service. 5.9 12-valve, 5.9 24-valve, 6.7 ISB, and 6.7 high-output. Injectors, lift pumps, turbos, head gaskets, transmission. The shop Cummins owners actually take their trucks to.

In short: Auto Trends services every Cummins generation in the RAM 2500 and 3500. Common work includes lift pump replacement (notorious failure), injector service, turbo work, head gaskets, and 47RE / 48RE / 68RFE / Aisin transmission service. We use Bosch and Stanadyne fuel components and Cummins OEM parts.
Common Symptoms

Cummins symptoms we see most.

If your vehicle is showing any of these, bring it in. Most are addressable; all deserve real diagnosis before parts are thrown at the problem.

Our Process

Diagnose first. Quote in writing. Then fix.

Every Cummins job starts the same way: scan with Cummins INSITE or QuickServe Online, pressure-test the fuel system, inspect the engine top to bottom, and document anything we find with photos. We send the report to your phone before any quote — no hidden fees, no parts-cannon guesses.

Once you approve the work, we use OEM Cummins, Bosch, and Stanadyne parts. We’re not the shop trying to save $20 on a $4,000 job by sourcing the cheap injector that fails in 30,000 miles.

Most jobs take 1–3 business days depending on parts availability. Fleet customers get priority scheduling and itemized monthly invoicing.

FAQ

Common questions.

Do you work on deleted Cummins trucks?

No. We do not perform DPF, EGR, or DEF deletes, and we will not perform emissions-affecting service on a deleted truck. We’re happy to do brakes, suspension, and other non-emissions work on any Cummins regardless of tune.

How much is a Cummins lift pump replacement?

Pricing varies by year and replacement choice (FASS, AirDog, OEM). We provide a written quote after inspection. Generally a 3–4 hour job with quality parts running $700–$1,400 all-in.

How long do Cummins injectors typically last?

On a 5.9 24v with quality fuel and regular filter changes, 200,000+ miles is common. On a 6.7 ISB, the CP3 (or CP4 in newer year ranges) and injectors are typically good past 150,000. Failures often trace back to fuel quality or contamination, which is why we recommend a quality lift pump and disciplined fuel filter changes.

Can you diagnose a no-start Cummins?

Yes. Most no-starts trace to fuel pressure (lift pump, lift pump fuse, contaminated fuel), starting circuit (batteries, starter, grid heater), or ECM/relay. We’ll diagnose, quote, and repair — typically same day or next day.

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Most appointments available within 48 hours. Free estimate. Photo inspection. A real person who answers the phone.

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