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TrailBlazer 2002-2009
The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

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Old 08-04-2007, 08:07 PM
Join Date: Dec 2006
Posts: 7
Default Service Engine Soon PO442

The dealer cannot find the problem with "Service Engine Soon."It has been there twice and of course, they charged us twice. It has now come on for a third time. I have swapped out the gas cap to no avail. Any thoughts?

I understand that the PO442 is a Service Engine Error code can be caused by one of the following:

1. Defective or loose fuel cap
2. EVAP canister or hose cracked- not connected
3. Purge or vent solenoid defective
4. Vaccum leak at engine
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Old 08-18-2007, 04:47 PM
Join Date: Aug 2007
Posts: 18
Default RE: Service Engine Soon PO442

check for a cracked fuel tank fill neck,if so theres a special policy for no charge replacement of the tank.
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2006, 442, canister, chevrolet, code, codes, connected, cracked, error, evap, forums, hose, po, po442, uplander

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