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How do you Change, Replace, or Install Broken 2003 GMC Sonoma 4.3L Serpentine Belt Tensioner Replacement

Fits years: 2003

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Tools required:

  • 3/8 ratchet


Step 1: Open the vehicle's hood.

Step 2: Insert the 3/8 drive ratchet handle into the square opening on the belt tensioner.

Step 3: Push DOWN on the handle to loosen the tensioner. You can now remove the serpentine belt from the vehicle.

Step 4: Using the routing diagram usually displayed near the radiator, place the serpentine belt in the proper position (around the right pulleys).

Step 5: Once the belt is in place, insert the 3/8 drive ratchet into the belt tensioner and tighten it. This will tighten the belt around the pulleys.


NOTE: The belt should be taut, but not overly tight!
These Part Change / Installation Instructions Apply to:

03 2003 GMC Sonoma Replacement Instructions

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