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Chevrolet Equinox Serpentine Accessory Belt Replacement Guide
How to change the serpentine accessory belt on the Ecotec 1.5L turbo I4 engine in a 2018 to 2022 Chevy Equinox.

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Paul B. Michaels
Author & Photographer
Auto Mechanic Since 1989

2018 Equinox 1.5L I4
Rubber Air Intake Hose
Loosen Hose Clamp
This automotive maintenance tutorial was specifically written to assist owners of the third generation (2018, 2019 and probably also the mid-cycle updated or revised 2020, 2021 and 2022 model years) GM Chevrolet Equinox SUV in checking or changing the serpentine accessory belt on the Ecotec 1.5 liter turbocharged four cylinder engine. The procedure may be the same or very similar for the 2.0L turbo I4 engine or the 1.6L I4 diesel engine.

Owners of other General Motors vehicles from Chevy, Buick, GMC, Cadillac and Holden such as the Trax, Blazer, Traverse, Tahoe, Suburban, Cruze, Malibu, Impala, Camaro, Cascada, LaCrosse, Encore, Envision, Enclave, Regal, Canyon, Sierra, Terrain, Acadia, Yukon, Savana, XT4, XT5, XT6, Escalade, CTS, XTS, CT6, Astra, Commodore and Trailblazer may also find these DIY instructions to be helpful.

The original genuine GM serpentine belt on this 2018 Equinox Premier was part number ACDelco 12654472.

Two other compatible replacement belts for the Ecotec 1.5L turbo I4 engine with their part numbers include the following: ACDelco 5K689 and Gates K050689.

The tools needed to complete this procedure include a flat head screwdriver, a long 3/8" drive breaker bar, or a long 18" to 24" 1/2" drive breaker bar with a 1/2" to 3/8" adapter.

You may be able to use a standard ratchet if it is long enough to provide the leverage needed to rotate the tensioner arm, release the tension on the old belt and slip it off the pulleys.

The first two steps are to open the hood and then move to the left (passenger) side of the engine bay.


Pull Off Rubber Hose
Hose Secured To Frame
Belt & Pulleys
For easier access to the left side of the engine, you'll need to at least partially detach the rubber air intake hose.

Loosen the screw on the silver metal hose clamp attached to the engine air filter box by turning it in the counterclockwise direction with a flat head screwdriver.

Gently pull the rubber hose off the plastic air intake tube on the air box.

Next, you can either detach the lower part of the air intake hose or just secure it out of the way.

I chose to wrap some painter's tape around the end of the hose and attach it to the engine bay frame near the radiator. You could also use a bungee cord.

Once the rubber air intake hose is out of the way, you'll be able to see the old belt and the various pulleys.

Take a moment to study how the old belt is routed around the pulleys including the alternator, crankshaft, tensioner, water pump (coolant) and the air conditioning system's compressor. I'll include a belt routing diagram further down on this page.

A/C Compressor
Tensioner Pulley & Arm
Large Crankshaft Pulley
The tensioner assembly is located near the top center area of the engine.

There is a square opening near the end of the tensioner arm for a 3/8" drive ratchet or breaker bar.

Alternator Pulley
Long 1/2" Breaker Bar
3/8" Drive - Tensioner
You'll notice that the belt extends back towards the rear of the engine and passes through a motor mount to reach the alternator pulley.

I chose to use a long 1/2" drive breaker bar with a 1/2" to 3/8" adapter.

Insert the 3/8" drive square peg into the opening on the tensioner arm.

Rotate Up & To Rear
Slip Old Belt Off Pulleys
Old Belt Removed
Pull the breaker bar handle up and / or back towards the rear of the SUV to rotate the tensioner and release the tension on the old belt.

Hold the tensioner in the released position closer to the back of the engine bay with one hand.

Very carefully slip the old belt off the tensioner pulley and the other pulleys.

Do not place your fingers or hand in between the old belt or any of the pulleys!

Pull the old belt through the opening in the motor mount on the side of the engine.

15.01.18 76 2 42
GM 12654472
EPDM 5PK 1755
Lift the old belt out of the engine bay and inspect it for any signs of wear such as fraying, chunks or rubber missing or cracks.

If the old belt is in relatively good condition, consider keeping it as an emergency backup just in case the new belt fails prematurely.

The OEM (original equipment manufacturer) belt in this 2018 Equinox Premier 1.5L turbo I4 was the ACDelco 12654472.

I've included a belt routing diagram below. The image is missing the motor mount on the left (passenger) side that you need to pass the belt through to reach the alternator.

Lower In New Belt
Pass Through To Alternator
A/C Compressor Bottom
A good rule to remember is that the ribbed side of the belt will be wrapped around ribbed pulleys and the smooth (flat) side of the belt will be against the smooth tensioner pulley.

If you found that your old belt was loose and the tensioner arm was very easy to rotate, you may need to replace the entire assembly. I also recommend checking to see if the tensioner pulley spins freely. If the pulley doesn't spin easily, wobbles or makes a squeaking noise, the bearing may have failed and the pulley will need to be replaced.

The OEM part number for the belt tensioner assembly is ACDelco 12638689.

Carefully lower the new belt into the engine bay.

Pass one loop of the new belt through the opening in the silver metal motor mount.

Pull the loop over the alternator pulley at the rear of the engine.

Then wrap the new belt over the A/C compressor, the water pump pulley and the large crankshaft pulley.

Release Tensioner Arm
Slip Belt Over Water Pump
New Belt Installed
Hold the last loop near the tensioner pulley.

Rotate the tensioner arm back by using the 3/8" drive breaker bar.

Carefully slip the last loop of the new belt over the tensioner pulley.

Double check that the new belt has been properly routed.

To check the tension on the new belt, grasp it at the middle of the longest run in between the alternator and the water pump.

Double Check Routing
Crankshaft Pulley
Belt Through Motor Mount
If you can easily twist the new belt past 90 degrees, the belt it too loose and the tensioner may be worn out.

A belt with the proper amount of tension should only be able to be rotated about 90 degrees (perpendicular) to the rest of the belt at the longest run.

Push On Rubber Air Intake
Tighten Hose Clamp
New Belt Installed
Push the rubber air intake hose back into place over the plastic tube on the engine air box.

Tighten the hose clamp by turning the screw in the clockwise direction with the flat head screwdriver.

Start the engine and listen closely for any strange sounds. If you hear any noises, turn off the engine, double check your routing and the tensioner assembly.

Be sure to record the belt change in your vehicle's service records.

For more, please check out all of my 2018-2022 GM Chevrolet Equinox DIY Repair & Maintenance Guides.

If you found this guide to be helpful, please consider making a small donation by clicking on the "Donate" button located to the right of this paragraph. Thank you!
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