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moconnor72

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  • Name
    Mike
  • Location
    New york
  • Drives
    2016 gmc Denali 1500 p/u

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  1. Good points on here. I have a 16’ GMC denali ultimate with the 5.3. I bought my truck new with 2,000 miles on it. It had a weird idle within a week so I figured it was something I was doing wrong. Nope. Fast forward to 2021 and I have put pirelli all seasons tires on, RXP catch can with a clean side separator, factory cat back Borla exhaust. The 2 biggest gains in throttle response were the 1. Borla and immediate. 2. Catch can- no more rough idle but a lot of gunk to be cleaned out periodically. Intake stays clean for the most part. I did buy a ARaid air Filter and elbow and took it off and tossed it somewhere in the garage. The COI are ok at mid range and with premium gas and a tune. The GM is a decent setup and they do tune it as a part of the package. I’d say the COI and exhaust with a tune won’t hurt anything. These V8 do suck in a lot of air.
  2. I use 0w-20 Mobil 1 in my 16’ Denali. I change it at 75% because I tow trailers. I furthermore use fully synthetic. No oil burning and for the cost of doing the more frequent changes let me fill you in on someone with their Ford Explorer with the 2.3l turbo - and at 5,500 miles the 5w-30 was water and before the change heard ticking. Please do oil 3,000-4.000 miles unless you don’t plan on hanging onto it.
  3. I added the Borla cat back exhaust from GM and I noticed an immediate Increase off the line throttle response. I personally wouldn’t venture too far from borla.
  4. Once again I’m seeing comments from the pre direct injection era owners. I currently own a 2016 is one that has been affected by more than usually condensation and oil being dumped back into a dry intake, unlike the previous motors being port injected. My input is if it’s running roughy change them. Buy an RXP CATCH CAN WITH A CLEAN SIDE SEPERATOR and clean the intake. I went for the injector bulliten but in 2016 I added my catch can because the rough idle fell on deaf ears.
  5. How about a 16’ Denali with 30,000 miles, just out factory warranty and even have extended. When in with ongoing transmission shifting issues and recall on injectors (idle goes from 500-800 sporadically) and they muster up this estimate. I can’t wait to unload this turd. GM is complete garbage. Never again.
  6. I had the same exact issue. I also have the factory cat back Borla exhaust for my Denali 5.3 and the exhaust alone gave me such an increase of toque of the line. I then added the air raid air filter and elbow along with a rxp catch can. My truck fell on its face. Sounded like crap. So I kept the air raid filter and put the stock air silencer back on and it sounded and ran great. The idle is perfect now. I'm pulling about 10 oz of gunk out of the separator every 1200 miles. You will need a probrammer for the air raid. I'm not ready to go down that road.
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