Ernessch

I just noticed the clunking sound in the last week. If I stand on the bumper and bounce up and down I hear nothing. If I shake the bed side to side I hear it. Does this still fall under leaf springs issue?

We're those 500 miles 1/4 mile passes?

Thanks everyone for your input.

Got to keep warranty valid or I'd use my experience and change every 4000 like I always have. If the oil monitor says change at 2500 I have to change to keep my warranty valid.

Trying to keep warranty valid so if the oil monitor says change at 2500 I have to change at 2500. Don't want to give them a reason to deny a claim. My truck before this was a 2001 Silverado with 94,000 in pristine condition before it was stolen from my driveway thus the new truck we speak of. It had an oil monitor on it but it never came on and I changed my oil every 4,000. When my warranty is over I'll go back to every 4,000 with good oil. Been keeping junk running since I was a kid in the early 70's.

So a drop of 18% in 440 miles of normal driving is considered appropriate. If I continue driving normally I should be at 50% at 1000 miles. Thanks. I'll order oil by the barrel.

6/9/2020 which is 48 days. My original post was 7-8-2020.

440 miles.

440 miles.

Update to original post. I've now driven 440 miles since the dealer changed the oil. My percentage has dropped to 81%. I do not drive that often and when I do it's mostly city but not stop and go. I do not let my engine sit and Idle. It's hot here in Oklahoma but most of my driving is in the mornings when the temperature is in the 80's. I live in an area that isn't that congested. I have made sure I take a highway trip of about 20 mile at least weekly to get a good reading of my oil life monitoring system before I hurt my engine or the warranty runs out. 81% can not be correct based upon my reading of GM papers on this system. Even under extreme circumstances I should get 3000 miles and that's with pulling a heavy trailer or heavy off road use. Per the GM posts and my driving style I should be getting 7500 or more miles. Please dont ask me to cite those papers because I can't find them on my web searches for this post. At this rate of normal old guy driving a web per cent calculator says I'll get 2315 miles between oil changes. This will be my last vehicle and I do not want to harm it if there is a problem. Also changing the oil every 2300 miles is not an option. My oil is clean and I check it before I drive it until I figure this out. I guess my question is, is this anywhere near normal? Can the dealer do anything about it? Is there any defect inside the engine computer that is causing these numbers? Can I reset the entire thing by disconnecting the battery and see if that helps? Can the GM algorithm software be wrong and need to be recalibrated by the dealer? Should I reset the Oil Monitoring System per the manual and try again? I'm not enjoying my new truck because of this issue. Sorry for the many questions but I'm not happy with this drop in Oil Life per the GM technology monitoring of my vehicle oil life.

I contacted the dealership service department and was told this 91% after 185 miles no matter the conditions is not normal and I am to bring the truck in for service as soon as I can and watch it closely until then.

I just bought a 2018 Silverado Dealership Demo with 3214 miles on it. I checked and the last oil change was at 2925 but 14 months ago. At my insistence the dealership changed the oil due to the length of time since the last one being so long. After 185 miles of 60% highway and 40% city driving my monitor reads 91%. At this rate it appears I'll get less than 2000 miles before my oil needs changed. Why has my oil life % dropped so fast in two weeks of driving? Does the % drop quicker right after an oil change? I checked and the monitor was reset. Thanks for any insight to this expensive issue.