GMC Canyon Engine Intake Manifold Gasket Set Guide (2014-2021)
Everything a 2014-2021 GMC Canyon owner needs to know about replacing a leaking intake manifold gasket.
- Failures are common due to age, not a specific defect; no recalls have been issued for this part.
- Symptoms include a rough idle, hissing noises, and Check Engine Light codes P0171/P0174.
- On the 3.6L V6, it's smart to replace spark plugs at the same time since the intake manifold must be removed for access.
- Top aftermarket brands like Fel-Pro and Victor Reinz offer reliable, cost-effective alternatives to OEM parts.
Is your GMC Canyon running rough? It could be the intake manifold gasket.
If you're dealing with a rough idle, poor acceleration, or a check engine light, a failed intake manifold gasket is a likely suspect. This part endures constant temperature changes and engine vibration, and over time, the rubber or composite material can become hard, brittle, and crack. This allows unmetered air to be sucked into the engine, which throws off the computer's calculations for fuel and ignition.
OEM vs. Aftermarket Gaskets
When replacing this part, you have the choice between an original equipment (OEM) gasket from a GM dealer and an aftermarket gasket. For the 2014-2021 GMC Canyon, high-quality aftermarket brands offer excellent reliability, often at a lower price. Brands like Fel-Pro and Victor Reinz are well-respected in the repair industry. Fel-Pro, in particular, often engineers its gaskets for the "real-world" repair environment, designing them to seal surfaces that may not be perfectly flat after years of use. Victor Reinz is a major OEM supplier for many car brands and is also considered a top-tier choice. For this repair, a quality aftermarket set from a known brand is a solid and cost-effective choice.
Pro Tip: Check Your Engine
The 2014-2021 GMC Canyon was available with three different engines: a 2.5L 4-cylinder, a 3.6L V6, and a 2.8L Duramax diesel. The intake manifold gaskets are specific to each engine. Always verify the part fits your exact engine before purchasing.
Choosing the Right Aftermarket Brand
When shopping for a new aftermarket gasket set, you'll find several options. Here's a quick look at the brands available:
- Fel-Pro: Often considered the benchmark for aftermarket gaskets in the U.S. They are known for their robust construction and designs that help seal imperfect surfaces, which is common on older vehicles.
- Victor Reinz: A global OEM supplier, Victor Reinz gaskets are known for their precision and quality, meeting or exceeding original factory specifications. They are a trusted choice among professional mechanics.
You can't go wrong with either of these top-tier brands. The choice often comes down to price and availability.
Known Issues, Recalls, or TSBs
Searches of the National Highway Traffic Safety Administration (NHTSA) database and other technical resources show no specific recalls or widespread Technical Service Bulletins (TSBs) for intake manifold gasket failure on the 2014-2021 GMC Canyon. Failures of this part are typically due to normal aging and wear rather than a specific manufacturing defect.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Gasket Set | $55 - $79 |
| New OEM Gasket Set (GM) | $70 - $110 |
| Shop Labor | $290 - $440 |
| Total Professional Replacement | $345 - $550 |
Cost estimates are based on national averages and may vary by location and specific engine type.
Frequently Asked Questions (FAQ)
What else should I replace at the same time?
On the 3.6L V6 engine, the upper intake manifold must be removed to access the rear bank of spark plugs. If your truck is nearing 100,000 miles, it is highly recommended to replace the spark plugs while the manifold is off to save on future labor costs. You should also replace the throttle body gasket and change the engine coolant if it was drained for the repair.
How can I be sure it's a vacuum leak from the gasket?
A common diagnostic trick is to spray carburetor cleaner or a non-flammable brake cleaner in short bursts around the edge of the intake manifold where it meets the cylinder head while the engine is idling. If the engine's idle speed suddenly changes or stumbles, it indicates the spray is being sucked through a leak. Use caution and do this in a well-ventilated area away from ignition sources.
Can I reuse my old intake manifold gaskets?
No. Intake manifold gaskets are a one-time-use part. They are designed to crush and conform to the surfaces to create a seal. Once removed, they will not seal properly again and will cause immediate leaks.
Is a coolant leak from the intake gasket serious?
Yes. If your Canyon has the 3.6L V6, the intake manifold gasket also seals coolant passages. A leak can be external (dripping onto the engine) or internal (leaking into the oil). Coolant in the oil is very serious and can quickly lead to catastrophic engine damage by destroying bearings. If you suspect an internal coolant leak (milky, frothy oil on the dipstick), do not drive the vehicle.
Technical Specifications
OEM Part Numbers: 12735542 12646459 12631192 12648665
Gasket sets are engine-specific for the 2.5L I4, 3.6L V6 (LFX/LGZ), and 2.8L I4 Duramax diesel engines used in the 2014-2021 GMC Canyon. Material is typically a combination of molded rubber over a steel or composite carrier.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- GMC Canyon: