Question about 2008 GMC Sierra 2500HD 2WD

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Exhaust filter truck say clean exhaust filter where is it ! 2008 sierra 4wd diesel looked in  book but can't find exhaust filter.

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Particulate filters are self cleaning. If the warning light comes on, you will need to take a long drive every so often to get the filter hot (It is a built-in part of the exhaust system.) Some models will also dump extra fuel int the system to help ignite the soot buildup and assist to "clean' the filter.
You need do nothing else; just get it really hot for a while each time the warning comes up. If you ignore it and do only short trips, it will clog up and need replacement.

Posted on Dec 27, 2008


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I have a 2008 3500 sierra 4x4 my engine lifght os on and go off at the same time as it says to clean exhaust filter how do i do that i drove for 1100 km.and it did go off but now back on could this be...

should be driven for 30 miles all highway miles to reset the exhaust filter. do you let your truck idle a lot. because the new trucks you can cut them on and off just like you would a gas truck. idle will make filter build up faster and running around town alot of stop and go . Don't be scared to blow it out that is really all you are doing is blowing it out. Your owner manual should have alot more details in it about cleaning your filter out. If i can help just re post.
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