impala454

My 2006 5.3L Silverado has about 160k on it and I've noticed a slow, significant drop off in gas mileage over the past few years. When it was brand new I got about 18-20 mpg, then for many years I was getting about 15-16, and just over the last two or three years it's more like 10-12. Any thoughts on things to address? I do regular oil changes, tire rotations, etc. Other than a water pump replacement in 2019, no major engine work at all. I did plugs/wires/belts/hoses at 105k. Any suggestions?

Yeah I'm not sure I want to go to the trouble of replacing with OEM, will check out AEM and see if I can find one.

I have a 2006 Silverado and have had a K&N cold air kit on it forever (this one). I'm long past caring about the performance or whatever and tired of cleaning the filter. Does anyone know of a conical paper replacement filter that fits properly in place of the K&N with this setup? I don't still have the OEM setup anymore so can't easily/cheaply go back to that.

Just as a final thought for anyone else viewing this thread, it was pretty easy to just grab a $2.00 12"x12"x1" foam piece at hobby lobby for this. All they had was white, but I didn't really care just as long as that rattling stopped. I know you can find it in gray or black online but didn't care to pay or wait for shipping. Here's a photo. Not the cleanest cut but it's all good.

Thanks for the replies. I actually contacted the manufacturer and they said they don't offer that part separately. Oh well. I appreciate the thoughts of sending me yours but I believe it's permanently glued on (which is why there's little crumblies all over my console now). I figured plan B was to just go get some foam at the craft store and cut it. Will just run with that. Thanks.

My 2006 Silverado has a console that's still in great shape, except for the foam piece which keeps the loose change in place and keeps the lid from rattling. This foam has completely crumbled away and now the lid rattles like crazy. I see a replacement lid can be purchased for about $70, but really all I need is the foam piece. Does anyone know where I can get this or if it's even possible? Here's a photo from the Dorman products web page: