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Where is the air pump ac on a 1999 GMC Jimmy?

The air pump (often called the Air Injection Pump or AIR pump) on a 1999 GMC Jimmy is located on the passenger side of the engine, typically near the front. It's usually driven by a belt, and will have a hose connected to it that goes to the exhaust system. However, its exact location can vary slightly depending on engine size (4.3L, 5.7L).

To be certain, you should:

* Consult your owner's manual: This is the best resource for the precise location for your specific vehicle.

* Use a repair manual specific to your 1999 GMC Jimmy: A Haynes or Chilton manual will have diagrams and photos showing the location of all components, including the air pump.

* Look online for pictures: Search for "1999 GMC Jimmy [engine size] air pump location" on Google Images. This can help visually identify it.

Keep in mind that some 1999 GMC Jimmys may not even *have* an air pump, as their inclusion depended on emission standards and the specific engine. If you can't locate it, it's possible yours was removed or never installed.