Ogee1

Hey everybody, just wanted to update my experience with the P 1488 code. So after 7 trips to the dealership to fix this issue, I was given a letter from “GM senior engineer “ that there would be a recalibration done in September. Well this was back in late May and I had had enough of the issue, so I filed a buyback/ repurchase request. I really like the trucks performance and MPG. GM bought back my truck and I got an almost identical truck in return. It took almost two and a half months, but it finally got done. I got an almost identical truck thinking that the issue was very limited and wouldn’t have to deal with it again. Well guess what? My second truck has this same damn code. I thought that I would be done with the issue, but now I have to wait until next month to see what this recalibration is going to do. I will keep everyone posted as to what happens with this so called recalibration. Hey Rockyblue, the clamp issue you posted is the first I’ve heard. Please keep us updated if the repair works or not. Thanks

Hey Brent, I was wondering if the dealership ever figured out what your P1488 code was. My dealership has yet to figure mine out. I would appreciate your response if they did fix your new trucks problem.Thanks

Looking for suggestions for the GM all weather floor mats. I only see black and dark ash grey for choices for my particular interior color. I was wondering if anyone has the dark ash gray, and if they match with the Dark walnut carpet color on the floor. I appreciate your answers. 

Looking for suggestions for the GM all weather floor mats. I only see black and dark ash grey for choices for my particular interior color. I was wondering if anyone has the dark ash gray, and if they match with the walnut carpet color on the floor. I appreciate your answers.

I took my truck back to the dealership to look into the issue again. According to the service rep, they couldn’t figure out why it was displaying the code again. They contacted one of the engineers at GM, and he told them to do an ECM reset. Since doing the ECM reset, my truck hasn’t shown the code again. There has been about 300 miles put on my truck since. I’m keeping my fingers crossed. Hope you get your issue resolved and mine stays resolved. I’d be interested to hear what your dealership comes up with as far as resolving your P1488 CEL.

A little more info on this issue. I have been to the dealership for this issue about 2 weeks ago. They determined that the code was the result of a bad particulate filter pressure sensor. I had to wait for the part to come in. They replaced it on 2/7/20 and the CEL came on again on 2/9/20 for the same code, which was verified through On star. I’m waiting on a call back from dealer now. Thanks

Hey everybody, I’m new to the forum and had a question. Has anybody had the P1488 engine on their new 3.0 Duramax? What was the dealerships fix? Thanks in advance for your responses.