Owners of other General Motors vehicles from Chevrolet, GMC, Cadillac, Buick and Holden such as the Trax, Equinox, Traverse, Blazer, Tahoe, Suburban, Sonic, Cruze, Trailblazer, Spark, Malibu, Impala, Volt, Bolt, Corvette, Camaro, Silverado, Express, Regal, LaCrosse, Cascada, Encore, Enclave, Envision, Canyon, Sierra, Terrain, Acadia, Yukon, XT4, XT5, XT6, Escalade, CT5, CTS, XTS, CT6, ATS, Astra and Commodore may also find these DIY instructions to be helpful.

The compatible replacement part numbers for the 2015 and 2016 models with the LFX 3.6L V6 engine include the following: Bando 6PK1970, ACDelco 6K775 and Gates K060775.

The compatible replacement part number for the 2017, 2018, 2019 and probably the 2020 models with the LGZ version of the 3.6L V6 engine is the Dayco 5050745.

If you have the Ecotec 2.5L turbo I4 engine, the compatible part numbers are the ACDelco 5K689 and Dayco 5050689.

The tools needed to complete this procedure include a 15mm socket and a long handled 3/8" or 1/2" drive ratchet or breaker bar.

The first two steps are to open the hood and then locate the belt and pulleys on the front of the engine just behind the radiator.

There is a belt routing diagram in your owner's manual. I also created a belt routing diagram with the pulleys labeled which is located near the bottom of this page.

It is situated below the water pump and above the crankshaft pulley.

Attach the 15mm socket to a long handled 3/8" or 1/2" drive ratchet or breaker bar.

Carefully rotate the ratchet or wrench handle towards the right (driver) side (clockwise) and down towards the floor.

As your turn the ratchet to the right, the tensioner arm will rotate towards the left (passenger) side of the engine bay to release the tension on the old belt.

Carefully slip the old belt off the top of the water pump pulley or the alternator pulley.

Do NOT place your fingers in between the belt and any of the pulleys.

Remove the old belt from the other pulleys and lift it out of the engine bay.

(Note - If you the tensioner pulley does not spin freely, wobbles or makes noise, it should be replaced. To remove the tensioner pulley, loosen the bolt in the counterclockwise direction - lefty loosy.)

Please verify the correct replacement belt for your truck by using the Amazon Part Finder website.

The correct belt part number will vary depending on the model year, trim level and engine.

Examine the belt routing diagram located in the row of pictures above.

A good rule to remember is that the ribbed side of the belt should be wrapped around ribbed pulleys and the smooth side of the belt will be routed against the smooth pulleys.

Route the new belt around the crankshaft, A/C compressor, alternator and water pump pulleys.

Hold the last loop of the new belt near the tensioner pulley.

Use the 15mm socket to rotate the tensioner arm and carefully slip the new belt over the tensioner pulley.

The ratchet or breaker bar handle should be turned towards the right (driver) side of the engine bay and down to rotate the tensioner arm into position.

The belt should be fully seated into the ribbed pulleys with no part of the belt hanging over the edge of the pulley.

Start the engine and listen closely for any strange sounds which may indicate an improperly routed belt or a worn out pulley bearing.

If you do hear any strange noises, immediately turn off the engine and check the routing of the new belt.

Be sure to write down the belt change in your truck's service records.

The owner's manual specifies that the belt should be "visually inspected" every 150,000 miles and replaced every 10 years if their is fraying or other damage. I'd recommend changing the belt anywhere from every 60,000 miles if you are very cautious or at least every 80,000 to 100,000 miles depending on the physical condition of the belt and your unique driving conditions.

Please check out all of my 2015-2019 GM Chevrolet Colorado DIY Repair & Maintenance Guides.