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C.C. Automotive logo C.C. AutomotiveTucson · Since 1981
C.C. Automotive Repair shop exterior with bay doors open
RPM ×1000
3101 N Stone Ave · Tucson, AZ  · Est. 1981

Diesel Ram Repair Tucson, AZ Cummins. Handled Right.

Ram 2500 and 3500 Cummins trucks are built to work — and they need a shop that knows the fuel system, turbo, emissions and driveline inside out. C.C. Automotive has worked on Tucson diesels since 1981.

4.8 ★211 Google Reviews
A+BBB Rated
12 / 12KMonth / Mile Warranty
FreeShuttle Service
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Ram Cummins Specialists

Real Cummins diagnostics, from the 5.9 to the 6.7.

Whether it's a 5.9 12-valve, a common-rail 6.7 or the latest high-output Cummins, we have the scan tools, fuel-pressure and injector-balance testing to find the real problem — not swap injectors on a guess. Hard starts, white or black smoke, low power, limp mode, DEF and regen problems, turbo issues and cooling: we see them every week on Ram trucks from Tucson, Marana and Sahuarita.

We also handle the truck around the engine — heavy-duty brakes, front-end and steering, Aisin and 68RFE transmission service, and lift kits with the alignment to match. Everything is backed in writing by our 12-month / 12,000-mile warranty, with a free shuttle and financing available.

Fuel System & Injectors

CP3/CP4 pump testing, injector balance rates, lift pump and fuel filter service — the heart of a Cummins.

Turbo & Air System

VGT turbo actuator faults, boost leaks, intake and charge-air cooler testing for low power and smoke.

DEF, DPF & Emissions

Regen problems, DEF quality faults, NOx sensors and EGR — diagnosed properly and repaired to keep the truck legal.

Driveline, Brakes & Suspension

Transmission service, heavy-duty brakes, ball joints, track bars and lift kits with alignment.

Know The Signs

Common Cummins problems we fix

01

Hard start or long crank

Often a weak lift pump, air in the fuel or injector return flow out of spec.

02

Low power or limp mode

Turbo actuator, boost leak, rail-pressure faults or an emissions derate.

03

White, blue or black smoke

Each color points somewhere different — we test rather than guess.

04

DEF or regen warnings

Frequent regens, DEF quality codes or a countdown to derate need attention before the truck shuts you down.

05

Death wobble or loose steering

Track bar, ball joints, steering damper and tie rods — a Ram front-end classic.

06

Overheating when towing

Radiator, fan clutch, EGR cooler or a clogged charge-air cooler under Tucson heat.

Why Tucson Trusts Us

Honest work. No surprises. Since 1981.

Our crew tells you straight what your car needs — never an upsell, never a runaround. Just quality parts and repairs done right.

12-Mo / 12K-Mi Warranty

We stand behind every repair — in writing.

Free Shuttle Service

Drop your car off — we'll get you to work or home and back.

All Makes & Models

Domestics, trucks and imports — Chevy, Ford, Dodge, Toyota, Honda, Nissan, Lexus and more.

Family Owned

A Tucson family shop that treats your vehicle like our own.

Payment Options

Fix it today. Pay over time.

Scan a code with your camera or tap Apply. Approval takes minutes, and options are available with no credit needed.

Synchrony Car Care™

6-mo promo on $199+
Scan to apply for Synchrony Car Care Scan • or hold to copy link synchrony.com/carcare

Promotional financing on qualifying repairs — a familiar name you can trust.

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EasyPay Finance

Up to $5,000
Scan to apply for EasyPay Finance Scan • or hold to copy link easypayfinance.com › Apply

Pre-qualify in minutes with flexible terms — no credit needed to apply.

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American First Finance

Flexible payments
Scan to apply for American First Finance Scan • or hold to copy link americanfirstfinance.com › Apply

Yes starts here — simple, flexible payment plans that fit your budget.

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Snap Finance

No credit needed
Scan to apply for Snap Finance Scan • or hold to copy link snapf.in/c4MHnZD

Lease-to-own and flexible plans — a fast path to yes on bigger repairs.

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Subject to approval by each finance partner. We accept cash and all major cards too.

4.8★ · 211 Reviews

Straight talk earns loyal customers.

"
★★★★★

They tell you straight what your car needs — no upselling, no runaround, just honest answers.

Google Reviewer
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★★★★★

30 years in the auto business and this shop finally earned my trust — top quality in every respect.

Verified Customer
"
★★★★★

Same-day diagnosis and repair, honest pricing — I'd give 100 stars if I could.

Verified Customer
How It Works

Three gears to back on the road.

01

Diagnose

We scan and inspect with the latest tech to find the real problem — fast, no guesswork.

02

Straight Talk

We tell you exactly what your car needs and what it costs — before we touch a wrench.

03

Fixed Right

Quality parts, careful work, and a 12-mo / 12K-mi warranty in writing. Free shuttle included.

Visit Us

On Stone Ave. Easy in, easy out.

Address3101 N Stone Ave Ste B, Tucson, AZ 85705
HoursMon–Fri · 7:30 AM – 5:00 PM · Closed weekends
Free ShuttleDrop off and we'll get you where you need to go.
Get Directions

Request Service

Fastest way to book is a call. Online requests may take up to 24 hours.

Request Sent

Thanks — we'll be in touch soon. Need it faster? Call (520) 624-9250.

Common Questions

Diesel Ram Repair questions, answered straight.

Yes — from the 5.9 12-valve and 24-valve to every generation of the 6.7 common-rail, including the high-output trucks.

Yes. We have the scan tools to command forced regens, test NOx and DEF quality sensors and diagnose the aftertreatment system properly.

Usually yes at reduced speed, but if it's overheating or a DEF derate countdown is near zero, call first. We're right off N Stone Ave near I-10.

Yes — fluid and filter service, diagnostics and repair.

Yes, with the alignment and steering geometry corrections a heavy diesel needs so it tracks straight and doesn't wobble.

Every repair at C.C. Automotive is backed by a written 12-month / 12,000-mile warranty.