Test Description

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number in the diagnostic procedure.

3

Introducing smoke in 15 second intervals may allow smaller leak areas to be more noticeable. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.

5

This step verifies proper operation of the Fuel Tank Pressure (FTP) sensor.

6

A normal operating FTP sensor should increase above 5 inches of H2O and stop between 6 and 7 inches of H2O.