Question about 2003 Chevrolet TrailBlazer

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2003 trailblazer - belt broke. Not the serpitine belt the on just below it. ( ribbed ) Trying to figure out what it is for prior to driving the car anywhere to get fixed.

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Do you have the V8 engine?

Posted on May 25, 2011

  • Ryan Lutton
    Ryan Lutton May 25, 2011

    You must have the V8 engine. The I6 doesn't have 2 belts. The smaller one that broke is for the A/C compressor. You're good to go drive it, just leave the A/C off while driving, no harm done and not a lot of money to replace it. Remember, while using the Defrost, this runs th A/C also to dry the air, so keep this off too.



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How to put serpitine belt back with out connecting ac

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A - crankshaft
B - alternator
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Please Rate my Response !
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You need to inspect your Serpentine Belt. That is the ribbed belt <see diagram below> that is driven by the engine's Main Pulley at the crank (generally, lower part of the engine). The smooth side usually drives the water pump, while the ribbed side drives the alternator, power steering pump, and air conditioning compressor. Inspect this belt and look for obvious signs of oil (slick stains) that have dripped onto the belt from another part of the engine. If you have oil stains, then you will need to get the source of the oil leak fixed before replacing the belt because you would otherwise be throwing money away as a new belt would soon experience problems due to the oil leak. If no oil leak, check for obvious wear on the belt by looking for BIG cracks that are penetrating through to the smooth side of the belt, cracks parallel to the smooth side of the belt, or chunks missing from the ribbed side of the belt <see diagram below, though the bottom diagram shows cracks perpendicular to the backing that are normal/acceptable; Parallel cracks soon become chunks missing from the belt>

badbelt2.gif If your serpentine belt is cracked or has chunks missing, it needs replacement.

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Diagram 2003 toyota rav4 serpitine belt routing

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