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The turbocharger oil supply line on the GM 2.0L LTG EcoTec2 engine has one job: keep oil flowing to the turbocharger at a steady rate. When that flow is interrupted, the turbo pays the price. This guide covers what the 2026-compatible direct-fit replacement is built from, exactly which vehicles it fits, and what to check before you order.

The line is a direct-fit replacement for GM part numbers 12633073 and 12679314 across Cadillac ATS, CT6, and CTS; Chevrolet Camaro, Malibu, Equinox, and Traverse; Buick Regal, Regal Sportback, Regal TourX, and Envision; and GMC Terrain — all in 2.0L LTG EcoTec2 applications. Fitment notes, photos, and availability sit on the Turbocharger Oil Supply Line product page.

Fitment coverage at a glance

Model-year ranges matter more than model names. The same badge can hide several engines and connector layouts, so run your vehicle against this table first.

A year match alone does not close the deal. Engine code, trim level, and the OE number printed on your removed line are the deciding details. If your vehicle sits outside these ranges or you are unsure which engine you have, get a fitment check before ordering.

Build specifications

Every value below comes from the specification for this line. These are the rows where bargain substitutes cut corners.

Why the 230°C rating matters

Turbo oil lines live with engine bay heat outside and hot oil inside. When a line cannot handle sustained temperature, coke deposits build up and choke the flow the turbo depends on. The PTFE liner with high-temperature reinforcement is rated for continuous service above 230°C to prevent exactly that.

The joints matter as much as the hose. The banjo fittings and sealing washers meet OEM torque specifications, so each connection tightens down the way GM engineered it.

What to verify before ordering

Start with the vehicle year, make, model, engine or drivetrain, and the original equipment number printed on the removed part. Then work through this list:

• Record the VIN and exact trim level.
• Compare the OE or interchange number and connector layout.
• Check whether the part is front/rear, left/right, or a complete set.
• Inspect nearby components that could cause the same symptom.

Match the OE number, not the look

A similar-looking component can still be incompatible. Compare the number on your old line against 12633073 and 12679314, then check connector shape, mounting points, dimensions, and left or right position against the fitment notes and photos.

Front, rear, left, right, or a set

Know which version the job needs before anything goes in the cart. Ordering one side when the repair calls for a pair is the most avoidable mistake in parts shopping.

If the numbers do not line up

Stop and get a verified answer instead of guessing. Send KOEEP the VIN and OE number for a fitment quote and settle compatibility before money changes hands.

Installation and diagnostic checklist

Disconnect power when the procedure requires it and support the vehicle correctly before working underneath. Take torque values and calibration steps from the workshop manual — the fittings are built to OEM torque specifications, but the final values and tightening sequence come from the manual.

Clean the mating surfaces before assembly, because debris under a sealing washer causes slow leaks that look like a failed part. Route wiring away from heat and moving parts as you reassemble, and test the repair before the vehicle goes back into service.

If a warning light stays on, scan the diagnostic codes and verify the repair instead of swapping parts at random. The codes most often tied to feed line faults — P0299, P2563, and P0045 — are covered in the companion diagnosis guide, along with HD feed line upgrades.

How to choose the right replacement

Prioritize verified compatibility, material quality, warranty coverage, and clear product photos. Blurry photos and missing material details are a reason to keep scrolling. For safety-critical systems such as brakes, steering, sensors, and fuel delivery, use the vehicle-specific specification rather than a universal substitute.

Hold a pressurized oil line to the same standard. Keep the original part until the new component has been test-fitted and confirmed — fit angle, length, and washer seats should all match. A mismatch you catch on the bench is a return shipment, not a roadside breakdown.

Related maintenance while you are in there

A feed line job puts your hands at the top of the engine with covers and hardware already out of the way, which makes it a sensible window to check ignition parts. The ignition coil compatible with Chevy Camaro, Colorado, GMC Canyon, Buick ATS, and CT6 covers a wide slice of the same GM lineup.

If the household also runs a 3.6L V6 car, the ECCPP 6 ignition coil set for 2016–2019 Cadillac ATS, CT6, CTS, and Camaro delivers a complete matched set in one order instead of six separate boxes.

More KOEEP guides worth your time

Feed line behavior makes more sense with fault codes in view. The P0299, P2563, and P0045 diagnosis guide traces those codes back to the line. Running a 2013–2014 Buick LaCrosse or Regal or a Chevrolet Malibu or Impala? The GM fuel pump assembly buyer's guide covers that job too.

Own a 2015–2018 Cadillac ATS and planning appearance work next? The front bumper spoiler lip upgrade guide walks through that fitment. For everything else, the KOEEP auto and motorcycle parts collection is the full catalog, sorted by vehicle and component type.

Getting ordering help

Two details settle most compatibility questions in minutes: your VIN and the OE number from the removed line. Request a fitment quote with both attached and you will have an answer before you commit.

Mid-repair and need a fast answer? Email support@koeep.com or start a WhatsApp chat with the team.

Frequently asked questions