This will be difficult to figure out without some further diagnosis. The first thing to do is to take it into a dealership as all emissions or ignition problems are covered under warranty for at least 3 years or 60,000 kms. There are a lot of program revisions that can be downloaded into your trucks […]
Written on Friday, August 8th, 2008 by willyclay :: 0 comments to this post
This will be difficult to figure out without some further diagnosis. The first thing to do is to take it into a dealership as all emissions or ignition problems are covered under warranty for at least 3 years or 60,000 kms. There are a lot of program revisions that can be downloaded into your trucks PCM for problems such as you describe. I am not saying for sure, but a lot of the really weird problems we used to encounter were repaired by GM releasing an updated program. There is also a possibility that you are experiencing an intermittent electrical connection or component problem that will eventually lead to a complete failure. A lot of these are very difficult to find unless the tech gets the truck to act up when he is looking at it. GM also releases bulletins that address issues like this in similar trucks so hopefully someone else has this and GM is aware of it and can fix it readily. Flushing injectors and changing fuel filters are always a good idea. I change the FF in my own truck about every 20,000 km. Adding a quality injector cleaner to your tank a couple of times a year is a great idea along with a yearly power flush. Good luck.
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