What does this diagram show?

It is a hose-routing schematic showing an evaporative emissions layout: a fuel tank (5) with a filler fitting (3) and a top fitting (4), connected by hoses (7, 8, 9) to a large canister (2), two small valve-type components (1 and 6), and an open vent fitting (10).

Does the diagram include a parts legend or part numbers?

No. The drawing contains only numeric callouts 1 through 10 with no legend, part names, or part numbers visible on this page.

How many numbered components are identified in the diagram?

Ten. Callouts 1 through 10 mark the valves, canister, fuel tank, fittings, and hoses in the routing.

Where does the fuel tank connect in this routing?

The tank (5) has a filler-neck fitting (3) at its upper right and a small fitting (4) on top, with a vapor line running from the top of the tank over to the canister assembly (2) on the left side of the diagram.

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GM 8.1L EVAP System Hose Routing Diagram - Canister, Tank & Vent Lines

Line diagram of a fuel/EVAP tank system with numbered component callouts

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Component diagram of a fuel tank and vapor-canister system with numbered callouts identifying lines, valves and the filler.

AI caption April 2014 · Photo 679 of 1176

This document is an untitled, unlabeled routing schematic identified by its upload filename as an 8.1L EVAP (evaporative emissions) hose routing diagram. The drawing contains no written text other than numeric callouts 1 through 10. It depicts a fuel tank (item 5, shown partially filled with fuel) with a filler neck fitting (3) and a rollover/vent fitting on top of the tank (4). Vapor lines route from the tank to a large EVAP canister assembly (2). Two small rectangular components, presumably solenoid valves (1 and 6), are connected into the hose circuit — one at the top left and one at the bottom center — via hoses labeled 7, 8, and 9. A vent line terminates at an open fitting (10) at the far left of the diagram. Because no legend accompanies the drawing, a reader can learn the physical hose routing and relative placement of the components but not their names, part numbers, or specifications from this page alone. Companion pages in the same album may contain the legend identifying each numbered item.

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Frequently asked questions

What does this diagram show?: It is a hose-routing schematic showing an evaporative emissions layout: a fuel tank (5) with a filler fitting (3) and a top fitting (4), connected by hoses (7, 8, 9) to a large canister (2), two small valve-type components (1 and 6), and an open vent fitting (10).
Does the diagram include a parts legend or part numbers?: No. The drawing contains only numeric callouts 1 through 10 with no legend, part names, or part numbers visible on this page.
How many numbered components are identified in the diagram?: Ten. Callouts 1 through 10 mark the valves, canister, fuel tank, fittings, and hoses in the routing.
Where does the fuel tank connect in this routing?: The tank (5) has a filler-neck fitting (3) at its upper right and a small fitting (4) on top, with a vapor line running from the top of the tank over to the canister assembly (2) on the left side of the diagram.