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SHey everyone, I’ve got a bit of an annoying issue with my 2021 GMC Yukon XL SLT (5.3L, ~98k miles) and could use some advice from the...
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SStewmatic reacted to jfoj's post in the thread 2021 Yukon XL 5.3L Running Rich - Fuel Trim Questions with
Like.
Here is a typical graph for my 6.2l warm up of Coolant and Oil temps in colder weather. Assume the 5.3l would be similar, possibly... -
SStewmatic reacted to blanchard7684's post in the thread 2021 Yukon XL 5.3L Running Rich - Fuel Trim Questions with Like.
This is at idle right? I get 0.6 lb/min air flow at idle. From a recent data log (2024 Suburban 5.3) At 45 mph on flat level ground...
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SStewmatic replied to the thread 2021 Yukon XL 5.3L Running Rich - Fuel Trim Questions.These where very insightful tips, I am Going to answer the questions you had in order here. 1.97,000 miles 2.3,200 miles 3. No make...
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SStewmatic reacted to jfoj's post in the thread 2021 Yukon XL 5.3L Running Rich - Fuel Trim Questions with Like.
A few things for everyone pulling and/or monitoring data with regard to MAF readings. Unfortunately ALL the App/Tools when set to...
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SStewmatic reacted to Fless's post in the thread 2021 Yukon XL 5.3L Running Rich - Fuel Trim Questions with Like.
Agree with a possible leaky or over-metering injector. Also check the MAF reading with a scanner; at hot idle it should read right near...
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SStewmatic replied to the thread 2021 Yukon XL 5.3L Running Rich - Fuel Trim Questions.This is what I got, based on some calculations the airflow looks about right. Not sure about that fuel pressure range 36-48?
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SStewmatic posted the thread 2021 Yukon XL 5.3L Running Rich - Fuel Trim Questions in Engine & Drivetrain.Hey all, been digging into some quirks with my 2021 Yukon XL (5.3L, 2.5 months old, still under warranty). Noticed it’s down a quart of...
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SStewmatic replied to the thread New-to-Me '21 Yukon XL - Maintenance and Mod and questions.Very interesting comments that will require more reaearch on my end. Thank you all for the update
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SStewmatic reacted to KMeloney's post in the thread New-to-Me '21 Yukon XL - Maintenance and Mod and questions with Like.
Currently, for the '21+ SUVs, there's only the option of the Range unit that plugs in under the truck/inboard of the front left tire, or...
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SStewmatic reacted to WalleyeMikeIII's post in the thread New-to-Me '21 Yukon XL - Maintenance and Mod and questions with Like.
They never deleted the DFM from the SUV's, that was a pickup only deletion. They did have several that had the auto stop/start delete...
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SStewmatic reacted to jfoj's post in the thread New-to-Me '21 Yukon XL - Maintenance and Mod and questions with Like.
You probably have a "Chip Shortage" version since it is a 2021 model. Cannot say for sure, you would need to research and/or use a...
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SStewmatic replied to the thread New-to-Me '21 Yukon XL - Maintenance and Mod and questions.Thank you, whats interesting there is no auto start stop feature on my 5.3 Yukon XL. I am just realizing that now. To answer your...
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SStewmatic posted the thread New-to-Me '21 Yukon XL - Maintenance and Mod and questions in General Discussion.Hi all, I recently picked up a used 2021 Yukon XL, and I’m excited about it so far! It came with some fresh updates, including: - New...
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SStewmatic replied to the thread Looking to buy 2010 Yukon with 130,000 for $7,000 good?.the 2011 Tahoe is supposed to be a very reliable vehicle according to Carcomplaints.com this particular model lands of the best of list...
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