Air, Fuel, and Exhaust

Air, Fuel, and Exhaust

The 2004 Hummer H1 Turbo Diesel uses an electronic Stanadyne injection pump and is controlled by an ECU.

From 1996 and on, the Hummer H1 has dual fuel tanks for greater range.

The exhaust exits behind the driver side rear tire with the muffler being located under the center of the truck.