Burnt Oil Smell---HELP

peanderson · March 8, 2016

I have a 2014 Silverado crew cab 5.3 with 19000 miles. I had my oil change last Thursday and ever since then I have been having periods of burnt oil smell come through the AC vents after driving and stopping. It is only when coming to a stop after I have been driving some. Even as little as 10 miles. It was strong at first then it seems to be lesser and lesser but it is still there even today. Here is the mystery. There is absolutely no oil anywhere in the engine compartment or under the car no leaks, drips, dribbles, drops nada absolutely nothing. I have had it on my lift two times and there is absolutely nothing that I could see, feel or even smell. After driving 110 miles i stopped and smelled the burnt oil smell out of AC vents and immediately opened hood and smelled as well as looked and there is not even a wafer of scent of oil. Any Ideas? Oil level is same every time i check it there is no drips on my drive way no oil on bottom of engine or transmission. Anyone else have this issue or any experience as to what it could be.

also note I idled it in my drive way for about 25 minutes checking various things and having AC on and nothing not even a hint of smell of oil.... confused to say the least.

BuyAmericanIron · March 8, 2016

Try changing your cabin air filter. I bet they spilled a few drops on the exhaust pipe and the odor got pulled into your filter. Every time you turn on the truck the HVAC system comes on and you smell the burnt odor trapped in the filter. I would use the filter with a carbon which will neutralize odors. Only thing I can think of.

K20and2500HD · March 8, 2016

i had this same problem on my 6.2L All Terrain, I had my last free oil change and started to notice at stop lights and such the oil smell, and it didnt stop, looked all around and finally I found a loose bolt in the timing cover, took it out put dope on it and tightened it back up, cleaned off the area and havent had the smell since. I guess what i,m saying is you probably have a leak, but very very slight. this thin oil burns very easy

Hozen · March 8, 2016

I just noticed the same thing on my 2015 5.3. Only smell it when I've been driving and then come to a stop. Exactly what you're describing. I haven't had time to take it to the dealer, but took a quick look under the hood and don't see anything obvious. Also, I have no drips or anything under the truck in my garage. So, it's very strange. If anyone finds out the culprit, please let me know. I'll take a look at my timing cover and see if it's a lose bolt.

Travis Whitmore · March 8, 2016

Just got my truck back from being repaired for burnt oil smell. In my case the gasket on the high pressure fuel pump was damaged and dripping a small amount of oil. They replaced the gasket and all should be good.