5.3

  1. L

    2012 Yukon xl 4x4 eating antifreeze?

    Let me start off with the fact that she runs perfectly. She's got the 5.3, no hiccups, no codes, no rough idle, live stream on the scanner shows no reds, etc. I have a generic scanner, but it's able to do almost everything a dealer scanner can do. She's got 275k miles on her and she purrs like...
  2. brice117_

    What to do lol

    So, I just got a 2012 SSV that was used as an offroad vehicle for the police, it has a slight lift and what not, I am wondering what can I do performance wise or wheels and tire wise to an SSV. The reason I say that is because not a lot of people seem to have SSVs (4x4) in the 5.3 If anyone can...
  3. CruelJung

    IAT Always Reads 32°

    Earlier this year, I solved a cold start issue with my 2008 Yukon XL (5.3 LMG) by replacing my ECT sensor. I discovered a few other issues along the way to that fix and one of those issues is that my intake air temperature consistently reads 32°, regardless of environmental conditions or engine...
  4. A

    Idles rough coming to stop

    Just recently purchased a 2011 PPV, ran like crap when I got. So far I have replaced plugs and wires, new air filter and cleaned the throttle body. Runs a whole lot better now but when I am coming to a stop the RPMs drop below 500 and shudders a bit then levels off then the RPMs bounce around...
  5. N

    2007 Yukon 5.3 DOD Delete

    Is it necessary to plug off the oil passages in the oil pan when doing a DOD delete? I had a full DOD delete kit put in (from ams racing) and tuned by a guy who’s local and came out to the truck where it was being worked on. My mechanic said its not necessary but its kind of got me wondering...
  6. ShookieJay

    How to Reset Transmission Control Module?

    Hey guys, sorry for the dumb question, but I've searched the forum several times as well as Google and haven't found an answer. Can anyone tell me how to reset the TCM, hopefully without a scan tool? I just installed a shift kit and corvette servo, as well as replaced the shift accumulators in...
  7. H

    Airbag light and parking brake

    I have a 2005 Yukon XL with the 5.3 in it. I’ve had an airbag issue where the light will come and go, and it is always for code B0044. I recently fixed my parking brake, and as I’ve been using it I’ve begun to notice that a few times i put the parking brake on, my airbag light would go away if...
  8. C

    New to the site and new to me 05 Yukon 5.3

    Just picked up a clean 05 Yukon 5.3 with 120k. But man she is ugly. Way to much chrome and sits way to high in the back. Other than that, I like this truck a lot so I'll probably be the annoying new guy with a million questions.
    • CoalTrain614
    • Thread
    • 2005 5.3 5.3yukon gmt800 lowered suspension loweredyukon
    • Replies: 19
    • Forum: Introduction
  9. ShookieJay

    '03 Tahoe 5.3/4L60/NP246 Swap to 6.0/4L80

    I have an '03 Tahoe with the 5.3 Flex, 4L60E, and NP246 (auto 4wd) transfer case. I have the opportunity to buy a low mileage rusted out truck for parts and I'm wondering how straightforward it would be to swap the drivetrain from the junker into my Tahoe. The donor is an '06 Silverado 2500 HD...
  10. Jeffs5-3

    03 GMC Yukon Totaled

    October 6th 2023 My truck was unfortunately totaled early morning on my way to work by some distracted driver who ran the light going 40mph and didn’t bother looking at the street lights. Street lights were out on the main cross streets so we had to resort to 4 way stop method as it was my turn...
  11. Jeremiah_Yukon02

    2002 GMC Yukon Random Cylinder Misfire (P0300)

    alright guys i just installed new injectors (OEM) and now my truck has a random cylinder misfire (P0300) under hard acceleration and at idle sometimes, I've heard that it could be fixed with a camshaft position sensor relearn but i'm not exactly sure and honestly i don't have the money to throw...
    • Jeremiah_Yukon02
    • Thread
    • 02 5.3l flex fuel 5.3 engine idle engine load gmt800 help i need help please mechanical random misfire
    • Replies: 8
    • Forum: Engine & Drivetrain
  12. Dustin Jackson

    2008 chevy tahoe Bad negative battery cable

    This is a video taken a few years ago when my tahoe wouldn't start, the solution ended up being to replace the negative battery cable then the problem never happened again. A good test is to grab the negative battery cable and jerk it around, if the Tahoe starts after that you'll know you found...
  13. ShookieJay

    Coolant Reservoir Level Sensor

    The past couple days I've been getting a low coolant message when I start my '03 Tahoe. The level in the reservoir is good and temp has been normal. Assuming the sensor is going bad. My question is, can the sensor be replaced or is it molded into the reservoir? I searched online for the sensor...
  14. S

    2015 Tahoe PPV Cyl 7 Intermittent Misfire

    Hello everyone, I’m new to the forums, my names Shawn and I own a 2015 Tahoe with the l83. I’ve had a cylinder 7 intermittent misfire for some time now and I can’t seem to figure out what the issue is. Here is the list of items I have changed/fixed. Fuel pressure is good, injector balance is...
  15. P

    2002 Yukon/Another knock sensor thread

    I've been reading knock sensor posts and watching videos for 3 days and I'm really in need of some direction. I have a 2002 Yukon with a 5.3. It was throwing a knock sensor code. It was only one but I don't remember which. I watched some videos and ordered two new sensors and a new harness...
  16. S

    a few mis-fires during drive cycle?

    2011 Chevy Tahoe 5.3 4x4 I recently bought this vehicle 97k miles I went ahead and did new ac Delco spark plugs, intake manifold gasket, both exhaust manifold gaskets, both valve cover gaskets, all 4 oxygen sensors, ring gasket driver side exhaust to cat, donut gasket for passenger side exhaust...
  17. E

    2005 Yukon XL 5.3 L59 to LM7

    We have a 2005 Yukon XL with 212,000 miles. It’s a western car so no rust. Lifter started making noise a week or so ago, mechanic thinks the roller isn’t spinning this scratching the cam shaft. Instead of doing a top end job, I’m thinking about a engine with less miles. Around me I can’t find...
  18. G

    Oil issue

    Hey guys I got a 2005 LS Tahoe 5.3, the oil was changed I’d say close to a month ago and I remember looking under it and saw a little oil droplet just where the drain plug was about a week later after I changed it. I looked under it yesterday and I see this. How is the oil making its way through...
  19. CruelJung

    2008 5.3 Engine Oil/Filter + Octane Rating

    I drive a 2008 Yukon XL, 5.3 1500 Flex Fuel. The vehicle has 170,000+ miles on it and the AFM/DOD is both mechanically and electronically deleted. I am interested in doing my own oil changes and would like to know what oil and filter brands are most ideal for engine health and longevity. From...
  20. Dustin Jackson

    Guys I need help figuring out this engine rattle

    Hey guys I think it has come time for my Tahoe for a AFM lifter delete. I think I am having a lifter failure but this sounds different from other videos I've seen. Someone said the pushrod might be out of place causing this sound? What do you think?
  21. X

    Resale value - Will we see a disaster?

    As we see these overly inflated prices on used cars and even new cars where dealer ask for thousands over MSRP I'm seriously wondering what it does mean for the resale value and appreciation down the road. What do you guys think? 1. Which Trim Level (or even what specific features) will help...
  22. S

    Pinging on 87

    2020 Tahoe LS with 5.3, 6-speed, 31K miles. I have tried Exxon, Mobil, BP, Shell gas in 87 grade and on 87 and often on 89 truck pings on highway trips, I am cruising 65-70 MPH, engine is always hovering around 1800-2000 and when I am trying to maintain the speed or add just a bit of throttle...
  23. B

    Rear end issue /after axle shaft replacement.

    Seeing if I can get some help here. 2007 Chevy Tahoe 5.3LS Rwd Issue: Rear end/ Differential Have a clunking noise when moving through uneven land. Or sometime turning slow. I have located the issue but don’t know what’s causing it. Let me explain….. I replaced the axle shaft on the left...
  24. Damuskoopthagreat

    2001 suburban saying its overheating but it's not

    I got a 01 5.3 suburban 2wd that has no cats. In the message center I continue the get a messege of check coolant temperature/engine overheating. The temp gauge will bounce back and forth but the engine isn't hot nor the coolant. When this happens it runs horrible, no power, no speed and...
  25. 0

    05 Z71 5.3 lifters

    I recently did a lifter job on my 5.3 @197000mi. the only issue before replacement was the infamous lifter tick. After replacing the lifters, and torqueing to specs in Haynes manual, upon start up still sounds like a small diesel engine, and the oil pressure has dropped to around 5-10. used to...

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