Oil consumption started after tune to disable AFM
57 members have voted
Hey guys I’m new to the forum but I’ve been a long time subscriber since I bought my 14 Sierra new in feb 2014. So I’ve read lots of horror stories on the site and I thought I’d tell you guys about my experience.
A few weeks ago over 5r holidays, my girlfriend and I were returning a uhaul after moving and she was following in my truck, she called to say that the check engine light was on and the truck had reduced power. We dropped off the uhaul and I hopped in and could tell it was misfiring and had a rough idle. I took it to my local mechanic and he told me cylinder 4 was misfiring and he tried a coil pack but that didn’t fix it, he did a compression test and it was holding compression but he told me this was gonna be a bigger problem.
luckily I still had powertrain warranty so I contacted the dealership that I bought the truck from and they had me tow it there using gm roadside. So my first hats off to gm, the lady I had on the phone from roadside assistance asked her manager to waive the tow fee as I was having it towed to my home dealership that was > than the 50 miles that they cover for free.
Once the truck made it to the dealership, it only took the. A couple of hours to figure out I had a failed lifter and broken rod for cylinder #4. Now I was freaking out because I’ve read horror stories on this site about having to argue with regional managers for warranty work this significant and I’ve heard dealerships arbitrarily saying work isn’t covered under warranty for whatever reason. Thankfully I can say my service advisor set me up with a rental the same day and reassured me that everything would be covered by gm. He did say parts were on backorder and it would take approx 2 weeks. Almost 2 weeks to the day, truck was ready to be picked up with 0 hassle the entire time.
This is my 3rd truck with the 5.3 and the only time I’ve had a significant mechanical issue. The truck only had 85000 km (around 50k miles) sure I was PO’d that my truck was out of commission for 2 weeks but I was extremely thankful that gm stood behind their product and was able to fix the truck for me. The truck seems to run fine now but I don’t know if I will keep it as I don’t know if it will be the same or if the issue will reoccur. I do know that my next truck will definite be another Chevy or Sierra. I can’t wait to see the reveal of the new Chevy this weekend at Detroit!
Jut thought I would post a positive warranty repair story and throw a kudos out to gm for making things right with me
Hello everyone, welcome to my build thread! This thread will be updated as I go. If you have any questions and/or concerns, feel free to comment below or PM me. Thanks, I hope y’all like it!
At the same time, I’m also trying to find a fix to a lot of issues with the truck. Many that others are experiencing as well, and some that seem to be isolated, so stay tuned. I’d love to hear your solutions to common problems found on our trucks.
The story began when I brought her home on the night of January 3rd, 2017...
Current Mods (as of 01/08/2017):
- Black factory Bow Ties
- 20% Suntek Films tint on front windows
- 65% tint on windshield
- AuxBeam LED Low Beams, High Beams, and Fog Lights
- AuxBeam 3" LED RGB Cubes
- MHtech LED Reverse Bulbs
- MHtech LED Cargo Bulbs
- Adaptive Valve left open with picture frame wire until I do my exhaust
- Rear Wheel Valence delete
- Step Bar delete
- AIRAID MIT + K&N HIGH FLOW FILTER
- Hankook Ventus ST RH06 285/45/R22
- 5% tint all around
- 50% Windshield tint + 5% strip
- Front Valence Delete
- Color Matched Bumpers
- New Generation Tow Mirrors
- Rear Window 3-Piece to Single-Piece conversion
- Flowmaster 40 Series Original, resonator and flapper delete
- K&N cabin air filter
- Oil Catch Can
- CAI Enclosed Box
- Diablo inTune i3 (or Trinity)
- Rear Traction Bars
- High performance driveshaft
- License Plate LED bulbs
- Footwell LED Lighting, Front & Rear
- 30” LED light bar behind grille
- Bose (or Focal) Audio Upgrade with a ported 10” subwoofer
- Escort Passport radar detector
- Blackvue front and rear dash cams
- 3.5” Lift Kit
- 20x10 -24 Fuel Maverick D610
- 33s (haven’t decided what type of tire or brand I’m going with yet)
- Running on Castrol High Performance Full Synthetic Oil
- Fueled with 93 Octane
Limitless Car Care (coupon code in signature)
- Waterless Wipe
- Swift Shine
- Gold Class Shampoo & Conditioner
- Hot Shine tire coating
- Interior Original Protectant
- Formula 88 Cleaner & Degreaser
- WD-40 (gives my black hitch a nice little Shine, hides the rust marks from my trailer coupling)
Tools I Use
- Fasmov Foam Cannon
- Microfiber Sponge and Towels
- Leaf Blower followed by a microfiber dry
Congratulations on making it this far, I’m proud of you. LOL.
A few months ago I bought a 2007 GMC Sierra (new body) with 150,000 miles on the clock. It has the LH6 in it. It has since gotten cold outside and when I start it in the mornings It has what I am sure is a rod knock. It goes away after the engine warms up. It has good oil pressure. I have always been a ford guy and wasn't too familiar with these engines otherwise I would have avoided these early AFM engines like the plague. It sounds a lot "deeper" than a lifter click. I have removed the valve covers and confirmed that I don't have a collapsed lifter or flattened cam. The thing consumed over a quart of oil in the last 2,000 miles. I had a cylinder 1 misfire and when I pulled the plug it was pitted and the porcelain was cracked showing tons of detonation. I replaced the plug and that fixed the misfire. All the other plugs look great.
Onto my question. With all these issues an the reputation of these AFM lifters and oil consumption I kinda want to get ahead of it and plan on putting an engine in it. This is my daily driver so i need to minimize down time. I was looking to get a block and get it ready to go in the truck (as money permits) so there is no huge rush or surprises. The problem is these specific LH6 Aluminum blocks were only used from 2005-2009 and are not the easiest/cheapest to find. The LY5 however is the iron counterpart to it and cheap and easy to find since they produced them 2007-2014 and were more common. I don't care about the 100lbs. Does everything bolt up? And would the computer freak out? I plan on eliminating the AFM and putting some trustworthy lifters and a cam in it so I will need some computer work done anyways hopefully it can be programmed enough to handle a different block? Would someone with HP Tuners be able to do the computer work or does the whole thing need to be sent off/replaced?. I've rebuilt a few engines It's just this computer stuff that gets kinda hayzey. If I am deleting the AMF is there another Gen IV block that would work for this application? Screw it and get a 6.0 and stroke it?
I have had the Elite Engineering E2 Catch Can on my 2014 Silverado for about 8100 miles and just performed my first oil change since it was installed. (Don't worry, I use Mobil 1 Annual Protection). Shocked is an understatement of my reaction when I discovered how much oil my truck is burning. After seeing how much was captured by the Catch Can, I am very glad I decided to install one. I have run a catch can in my Camaro for several years and it captured far less oil between changes so I was very surprised with how much was captured this time. After doing this first check - up on the catch can, I now plan to check the can much more frequently (every 2,000 miles or so) to see how much is being captured. I will be uploading some additional follow up reviews on the catch can and how it is performing. Overall, I am completely satisfied with my purchase and will be purchasing from Elite Engineering again. Note that this engine is shared among many GM platforms such as the Silverado, Sierra, Yukon, Suburban, Tahoe, Express, etc.
Recently Browsing 0 members
No registered users viewing this page.
Most OnlineNewest Member
Who's Online 41 Members, 0 Anonymous, 286 Guests (See full list)
- Derek Meredith
- Josh Mingus
- Sideways the Seven
- Chris Talbot