Lance455

44k on my 2017 8 speed 5.3 with no issues be nice to it for the first few shifts in the morning and runs great all day.

Hopefully you just had a fluck of a fuel pump does happen. Can't say i had the same issue but i never cared for the cap less filler. im from the Midwest and drive on a lot of back roads and gravel and i ended up just going to lowes and getting a pipe cover 2.5 will fit good and snug won't fall off by no means keep the filling area clean and don't see it causing issues now in my opinion.. Plus if you're from a area that gets snow it will at least keep the hole cover so when that area get filled with snow water won't be getting water in to the system as well. Only does that in blizzard and 40 mph winds at least in my experience. GM does make a locking cover but it a bit of a pain and lock breaks very easy missed the old set up on that one.

For reference i haven't had much luck with those they work great when they do work but it plastic and is bit brittle. The cap is a good idea especially if you you're wanting a locking one. lt just need to be made better.

Nope there isn't just a updated part number but the cap it self is the same. wouldn't waste the money lock is really cheap breaks easy.

When it says hold the button do they mean all the way up or down to the express the point b4 the express up?

Yes really LOL. Give it time to get it chocolate together it works out to be a pretty fine transmission nice hard break in period seemed to help it along pretty well. Must not drove to many tractors because some of those shift so bad i thought it was a transformer =p

21k Update tranmission is running just fine and shifting is nice and crisp low speed clunk happens rarely so it not even really a thought any more.

So any ideal on what the difference is between the 2017 cap and 2018 cap wouldn't think there be much change in the filler.

I did the switch on my 14 and it didn't help the oil burning i was down 1.5 qts in about 2500 Mine started a little after 20k . Once it starts i think you're kinda screwed at least in my case i traded at 40k. Haven't had any issues on my 17 currently just over 20k. Been running 0w 30 and 5w 30 with no issues started running it the first oil change at 3k at the time. i'll know more over a little more time.

Never had any issue running 0w30 or 5w30 in the current version of the 5.3.

About a 15 to 20 min project depending on your pace just a matter of unhooking the 2 hose on the breather and losing up the clamp from the breather unhooking the throttle body wire then 4 10mm bolts for the throttle body. I swap my 14 with the Jet throttle body and i liked it better than stock i traded my 14 in for a 17 back in feb but haven't gotten around in changing it yet.

My 17 does sometime run a touch above 210 but drops back down shortly im guessing it just how they had the thermostat set up and how it cycles only notice it running down the highway stays right at 210 driving in town. My 14 stayed at 210 and didn't ever budge except going up pikes peak the only time i ever seen it run higher.

I think e15 would be fine if there was more of a price gap depending on the side of town there about a 15 cents difference just in e10 which makes it about 5 cents cheaper then the e15 on the higher price side of town. My only question is why with the 8 speed and the 5.3 they don't offer the flex fuel option.

I have a 2017 5.3 8 speed with 1100 on it now and the transmission shifts great in my opinion so far only clunk is in parking lot hardly any throttle it clunks in to second as soon as u let off.(less then 5 to 7 mph). if you feather it long enough for it to shift it seem to be fine another option is since some are running in L7 for their daily drive could down shift it to L1 to avoid that odd shift. But overall i am quite please with how it running so far.

I had a similar issue like that I would be leaving the parking lot letting the fast idle pull the truck up to speed then add alittle light throttle then it would surge off and on some. Went to a aftermarket throttle body and haven't notice it since.