Discussion Starter · #1 ·
I have a 2008 Sierra Z71 with 5.3. One of the DOD lifters is making noise at start-up until oil pressure gets up. This has been going on for the 2 years plus that I've owned the truck. I bought it with 215k and it now has 225k. I would like to replace the engine. My thought is that I would install a DOD delete kit in the replacement engine before installing it. My concern is if programming the ECM to delete DOD will fail the Maryland emissions test. I currently have the Range unit that plugs into the OBD-II port. When I went to emissions testing last time, it wouldn't pass until I had a complete cycle without the Range plugged in. I was hoping that programming the ECM wouldn't have the same effect since it's not trying to change things on the fly like the Range. Is there anyone that has experience with programming the ECM in Maryland and the emissions test?