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GMC Sierra 1500 Prospects

Old 04-05-2018, 09:38 AM
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Default GMC Sierra 1500 Prospects

Hi crew,

For the first time, Iím considering my options in the the pickup market. GMC pops off the list for me because of the styles and Iím currently looking at getting a 5.3 V8 Crew Cab 1500 SLT. All the excitement about changing vehicles wouldnít be complete without doing all the digging for history, troubles, etc. so here goes the drama: what in the holy hell is going on with this oil burning problem GM has and is seemingly avoiding at all costs. Is it really what it seems? Can this be fixed by turning off the AFM system via a $200 third party plug in and thus always firing on all 8 cyclinders? Lastly, if an engine has 40k miles on it and burnt oil all that time, should I not be purchasing that or could I purchase that AFM turn off computer and use the truck per usual? Iíd love to hear from anyone with experience or the know-how to make the decision to go through with this truck or not.
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Old 04-05-2018, 10:12 AM
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I don't know if turning AFM off fixes the issues. I can tell you I've had chevys my whole life. My dad got a new one about 2 years ago and it's been the biggest POS I've seen. 40k miles and it burns oil like gas. When it came to time for me to get a new truck a few months back his experience and their lack of towing power scratched the 5.3 off my list.
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Old 04-05-2018, 10:53 AM
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FYI, you can only disable AFM on 6-speed transmissions.
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Old 04-05-2018, 11:02 AM
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I have a 2013 Tahoe 90K miles and burns oil real pain in the ass. I am getting ready to do a dyno/tune to disable afm hopefully that will help. Hope so damn dyno/tune is going to cost me 600.00. I have never bought a Dodge but I honestly believe my next vehicle is going to be Ram Laramie
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Old 04-05-2018, 11:36 AM
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I have a 2017 GMC Sierra and have no complaints
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Old 04-05-2018, 11:38 AM
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Originally Posted by fmach13 View Post
I have a 2017 GMC Sierra and have no complaints
Had to say it but just wait
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Old 04-05-2018, 12:15 PM
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I have a 2014 Silverado with the 5.3, 45,000 miles, no problems yet but knocking on wood as I say it...
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Old 04-05-2018, 12:47 PM
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I have a 2014 with 62,000 miles and no issues with oil consumption and AFM is not disabled.

Did have the electronic gas pedal go bad and just replaced the AC condenser my self last weekend. Can't say I'd get one again but also have no reason not to get one.
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Old 04-05-2018, 12:58 PM
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2014 with the 5.3 and just under 70,000 miles. No issue with oil burn, and I don't have AFM disabled. It is a bitch that this thing takes 8.5qts though lol.
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Old 04-05-2018, 01:19 PM
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I have a 2011 Silverado 5.3, purchased a range that plugs in under by steering wheel to disable AFM. At 96K miles, and no issues at all. If you want to good tuner, look at Diablo Tunes. They are solid.
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Old 04-05-2018, 01:32 PM
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Originally Posted by jshanks View Post
I have a 2011 Silverado 5.3, purchased a range that plugs in under by steering wheel to disable AFM. At 96K miles, and no issues at all. If you want to good tuner, look at Diablo Tunes. They are solid.
Did you purchase that truck new or used? That Range is the exact plug in I am looking at wondering if it helps or not. Iím hoping not to have to get a tune and just use the Range
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Old 04-05-2018, 01:46 PM
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I've had two of the newest body style--a 2014, and a 2018. I liked the cooled seats better in the 2014, but it had vibration and exhaust problems and I got rid of it. The 2018 is much quieter, smoother, and faster--it has the 6.2L engine/8 speed though.
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Old 04-05-2018, 01:56 PM
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The AFM was an issue on 07-09. THe newer ones dont have the issue. I had a G8 with 6.0 ( 114k miles)and AFM I turned it off but that does not mean a lifter won't fail.

The newer DI engines from 14 on are more bullet proof.
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Old 04-05-2018, 02:13 PM
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I had an 06, pre afm, no issues at 200k. Sold it and bought a 2013 with 5.3 and 6 speed. Ran it to 200k miles and sold it last fall. Now I’m driving a new 2017 5.3 6speed 20k miles no issues.

Ive read all of the horror stories but my trucks have always been dealer serviced and dexos oil changes and I’ve had no issues. The only thing is every one of the above mentioned trucks has needed ball joints around 175k miles. I also had a wheel bearing go on my 13 at about 130k. Other than that they have been solid trucks.
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Old 04-05-2018, 03:51 PM
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Originally Posted by joshd472 View Post
I don't know if turning AFM off fixes the issues. I can tell you I've had chevys my whole life. My dad got a new one about 2 years ago and it's been the biggest POS I've seen. 40k miles and it burns oil like gas. When it came to time for me to get a new truck a few months back his experience and their lack of towing power scratched the 5.3 off my list.
Iím very interested in this post. Why do you say ďPOSĒ ?
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Old 04-05-2018, 04:12 PM
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This is my last 5.3 for sure I have the range if anyone wants it you can get a deal on it from me. The range cuts off the afm but sets off codes mostly with the stabiltrack. Just really unhappy with the performance of the Tahoe Chevrolet could have done better.
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Old 04-05-2018, 06:54 PM
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Originally Posted by Loneshark211 View Post


Did you purchase that truck new or used? That Range is the exact plug in I am looking at wondering if it helps or not. Iím hoping not to have to get a tune and just use the Range
I also have a 2011 Chevy 1500. It burned oil prior to using the "Range". With the Range, it hardly uses any oil. MPG stayed the same as before. I recently switched from the Range to a Diablo tuner with a "Diablew" custom tune. This made the truck more responsive and increased MPG, and avoids the quirks that come with the Range.
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Old 04-05-2018, 07:19 PM
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I have a 2017 Silverado LTZ Z71....I've got the 6.2 and love it. Didn't love the 8 speed tranny and still don't although getting the torque converter replaced has helped.

22 mpg on the road and it's as quiet as a Lexus. Have not done any mods to the suspension although I am contemplating a level.
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Old 04-05-2018, 08:59 PM
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Originally Posted by Loneshark211 View Post


Iím very interested in this post. Why do you say ďPOSĒ ?
Heís had AC problems, burning oil problems, and the thing is just weak. It doesnít tow well, always hunting for gears a lot on the highway pulling a 4wheeler trailer. This truck has been babied too. Dealer serviced itís entire life. Any time he gets in bumper to bumper traffic or letís it idle for 20 mins or so it can and will burn 2 quarts of oil.

I know 2 other guys that have them. One dropped a valve and turned the block into a paper weight. The other is already having lifter issues.

Im not brand loyal at. If Chevy gets back on top when itís time for me a new truck I will switch back to them. I think they have the best looking trucks out right now but the others have them beat everywhere else. .
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Old 04-06-2018, 09:31 AM
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I have the 2016 GMC Sierra with the 6.2. No oil burn. Runs great, 22mpg on the highway. No complaints.
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