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20 Gallons
23 Gallons
The fuel pump on a 2003 Envoy is changed by removing the gas tank support straps, lowering the fuel tank, and disconnecting the fuel lines. The wiring harness is then disconnected, the pump unbolted, and the removed to allow the new pump to be installed.
One in the fuel tank (pickup screen), one in the fuel line and one in each fuel injector.
Call your local parts store and they will tell you.
GM vehicles do not use inertia/kill switches
The fuel tank capacity of a 2007 envoy is 22.0 gallons.
GM vehicles do not have a fuel pump inertia switch. There is nothing to reset. Check the fuse and fuel pump relay.
Sorry. It is considered a non serviceable unit on your Envoy. It is part of the fuel pump located inside the fuel tank.
I wouldn't, unless you want to reck your fuel injectors It is recommended you only use premium grade petrol.
fuel level sensor
Where is the fuel pump fuse