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Found 14 results

  1. I have a 2020 gmc sierra sle 5.3, I bought it may 13th. Starting at about 800 miles check engine light would flash for a minute or two and then go off, this occured every 300 miles until I got in one day around 1500 or 1600. Check engine light stayed on. Called the dealership and took it in was throwing misfire codes, the diagnosed it as fuel pump module reset the codes and ordered the part and sent me on my way. Come back in and had it replaced when the part arrived, well now fast forward to a tank and a half later and now the check engine light is on for the evap system/gas cap, and fuel pressure at 2200 miles. Right at a week from the time it come out of the shop. I've been extremely happy with the truck but I can't believe I'm going to have to find time to get it in the shop to be looked at and fixed again. I'm at wits end already. Anyone else having these issues?
  2. So this week I brought my truck into the dealership because of a ticking and squealing sound mostly when the engine was cold. After touching base with the service advisor the following day he notified me that the truck needs lifters and a cam. Parts have been ordered (5-7 days) and they will be doing the repair under warranty. The truck only has 69,000km (5.3L) and it doesn't take a beating. I get 13L/100km mileage. Thankfully the truck is still under warranty (5 year/160,000km), but I find it odd that the cam shaft needs to be replaced on the truck at this point. Anyone else dealt with a similar issue at this stage in their trucks life?
  3. 2007 Silverado 5.3 V8 with AFM with 180,000 miles Truck had lifter ticking sound and white smoke upon every start up which would go away after a few minutes, no check engine light Replacement list : - headgasket - valve gaskets - upgraded drivers side valve cover - valve stem seals - intake manifold gasket - exhaust manifold gasket - 8 new afm lifters - 8 new non-afm lifters - head gasket bolts - engine coolant temperature sensor - spark plugs - spark plug wires - fuel injectors - water pump - thermostat - cam sensor - crank sensor After completion of engine reassembly no longer had white smoke upon start up and no ticking sound but flashing check engine light code p0300. Code p0300 was for cylinder #1, #4, & #7 Moved coil packs between cylinder #1 and #2 to see if coil packs was bad but no change. Set engine at TDC before installing the rocker arms. All bolts have been properly torque and no parts have been left unplugged or uninstall. Any possible advice would be helpful
  4. I had a flashing check engine light on my 2016 Tahoe (5.3 with 21,000 miles) that would come on for 30 seconds and then go away. Happened to me twice, about a week apart, going up a slight grade at about 20% power. Truck drove fine and didn't seem to be really impacted by it. I took it in yesterday to the Chevy dealer to have them check it out. They did not tell me the code that they were able to pull but let me know they were going to replace the lifters in it. Seems like a pretty big repair job.. the service technician said its an expensive repair. Curious to hear if others have also had this problem. Hopefully this is just a one off and will be fine going forward. Luckily I have another 15K miles of warranty left so will monitor closely. This is my first GM vehicle in 8 years after returning to the brand. I've also been battling the vibration going over 70 mph but have it pretty well isolated to the tires. Truck has the factory 22" rims which probably don't help the problem. Lowered PSI in the tires to 33 psi and recently had them balanced/rotated which helped. Will probably throw on a set of Michelin's shortly to dump the factory Bridgestones.
  5. On Sunday March 8th I was driving my Sierra home from my parents-in law. I pulled out from a stop sign and was just getting up to speed when there was a loud bang followed by loss of power, Loud ticking noise, vibrations and a sulfur smell coming from the exhaust. I knew this was lifters instantly as it Happened to me in August of 2018, a short 11,000 miles ago. So, I took it in to my dealer who ran diagnostics and gave me the news That I would need lifters replaced yet again. Unfortunately, my power train warranty ran out December of 2019, so they told me I would owe a balance of $2900+ tax. Of course I was very upset with this news as I would have imagined the dealer would talk to GM and get this issue sorted out.. I mean it was only a few months over a year and less than 11,000 miles since they replacedall of the lifters and the cam shaft. I contacted GM myself and over the course of the last week have been working with the dealer and trying to talk to someone at GM who could help. Finally I reached a “senior analyst” who is apparently the top tier of customer assistance and she told me there was absolutely nothing they can do and I am responsible for the entire bill. I insisted that GM must know about the issues this engine has By now and should acknowledge and help their clients, but she offered no help. How can I trust this engine again? I have read many posts people have put on this forum alone with this issue of failing lifters. How can anyone be expected to pay this much for an issue that is derived likely from GMs design of the afm system? Especially after we pay $50,000+ for the truck to begin with! I do not pretend to be an Mechanical or financial expert, but I feel I have been severely wronged in this situation. I have no choice but to eat this cost and sell the truck before the lifters have a chance to fail again. I would suggest anyone doing research considering buying one of these trucks (I believe Sierra and Silverado 14-18 at least) that has the active fuel management system to rethink it. I would also go out on a limb and suggest my friends with 14-15 year Silverado and Sierras (with expired powertrain warranty’s) to consider selling them before the lifters fail on yours and you are stuck with a $3000-$5000 bill. Good luck all.
  6. Hey guys, I got a 2015 Silverado 5.3l. 138,250km. started ticking sometime last winter. Would happen instantly at start up and last about 5 minutes then would fade away. Sounded like a lifter. Took it to the dealer they said they couldn't hear it. Sound went away so left it. Fast forward to this winter and as Soon as the weather started to cool down I noticed the ticking again. Took it back to the dealer said they couldn't hear it again. I went and picked up my truck right at closing, soon as I fired her up the sound was there but everyone was gone so no one to hear it. I took a video. Next day I called the dealer, sent the video. Took like a week to get back to me. In the meantime I had taken videos pretty much every time I started it. Long story short after a brief fight with them about them trying to say it's normal etc they agreed that it sounded like a noise coming from the valve train. Left my truck with them, they called me said they had to change all lifters. Went to pick up my truck and on start up the sound is still there. This was a month ago. Sent more videos and a previous video from before they did the work and they are saying they can't hear it again. Took it in in person they agreed that there's an issue again and they will look at it. Now they are saying it's possible bad injector noise but they can't figure out which one . In the meantime I took it to another dealership they changed the vacuum pump. After that the sound changed. Now it's no longer at start up but once the truck has reached operating temperature and is more of a dull sound. Took it back to that same dealer who did the vacuum pump and they said valve train noise and deffo not injectors. But they won't work on it because the other dealer already did. They didn't change the VLOM or the cam. I had/have no check engine lights. Truck runs awesome. Sometimes rough idle. Any ideas what it could be?
  7. I'm doing my best to isolate this ticking sound that is persistent, yet intermittent. Data so far: 2018 CC SLT 1500 6.2L 4WD Max Tow 19K miles, all stock Doesn't happen when motor is cold, much more prevalent when motor is warmed Doesn't happen when letting off throttle (only under application of throttle), can be heard in neutral, park, and in drive (not in reverse enough to tell--but it happens when transmission is not engaged) Sound follows steady or increasing RPM of motor Under light to medium load, noise is prevalent, under heavy acceleration it subsides (not because of engine noise) If I turn wheels hard left, the noise disappears, straighten wheels, it returns (like wheel is blocking noise from traveling) Sound only heard on driver side If I hit some oscillating bumps on the road, it can stop for a while before returning back (under varying loads as well) If left in tow/haul mode, at 2500 rpm under light load it can still be heard Ran 2 bottles of Red Line injector cleaner and it didn't eliminate/help noise The truck was silent until the 700 mile mark and I hit an expansion joint (nothing out of the ordinary) and the sound started and has remained ever since I've checked exhaust/manifold connectors and no sign of leaks (soot) I put a hollow aluminum rod (2 foot long) to the vacuum pump and did not hear any abnormal noises directly from the pump Obviously heard injector noises when put to the injectors; haven't had chance to stop on side of road when the sound disappears to run comparison tests Sometimes it'll run dead silent when driving down the road (after complete warm up) and power delivery doesn't change but noise comes back within a minute or two Sound heard in both V-8 and V-4 modes, and while in manual shift mode Use premium 91 gas ever since purchase (93 not available in Bay Area)--use Costco Top Tier fuel (high volume station) Oil changed with Mobil 0-20W Full Synthetic every 5K miles religiously and OEM filters (indicator usually states 37% remaining at around 5k miles) 90/10 Highway/City driving Any thoughts? My MPG is seems close to normal. Lifetime average of 17, most of my time driving is short city trips or long highway driving with a bed full of gear and a dirt bike. Some of the actions seem like it could be a noise related to the vacuum pump but the pump doesn't exhibit any noises itself. Sounds kind of like exhaust leak--exhaust seems to check out (no notable soot around connections or along piping that is visible). If it was something loose, I would think that even under deceleration (letting off throttle) would cause the noise to persist. It follows increasing RPM. I've checked around the footwell and haven't noiced any plugs missing or issues there. The fact that the sound is not there when cold or after some bumpy roads makes me think something else is up. Thoughts? Things to check? When it is quiet, this truck is wonderful. The ticking in the background that comes and goes is like a form of Chinese water torture. The fact that it does go away sometimes makes me even crazier as I know it could be better. When I bought it, it did not make this noise. Only after 700 miles of driving did it begin to tick tick tick away.
  8. Beating a dead horse here... Have a Denali 6.2 that I just purchased from CarMax (with an extended warranty/Thank God!) Tapping sound from the start. Ran two tanks of 91 octane to eliminate possible octane knock. Took me past the 7 day return policy and 30 day standard warranty with CarMax. Didn't really bother me because of the factory warranty. Truck looked brand new. Even had the wrapping on the DVD player. Popped the hood and started looking for an exhaust leak. I found a donut/flange laying on the crossmember. Took it to the dealership. Found that the truck had two new fuel injectors and a new Catalytic Converter. Someone was searching for the cause of the sound. Dealership tightened some gaskets and said the truck was good to go. It made the deafening tapping noise on the way home. I returned the truck to the dealership. Even though I have purchased 4 vehicles from them in the past to include a current 2019 Arcadia -- they had no loaner for me. They kept the vehicle for two more days. Could not find the cause of the noise. I went back to speak with the service manager. He was not happy. He went on a ride with me and heard the noise. Claimed it was the transmission searching for the proper gear. Weird because the noise happens constantly -- to include start up and idle. Told me his 6.2 made same noises and it was normal. Finally took it back to CarMax. They sent it back to same dealer with a promise to pay for diagnostics. Miraculously, dealer finds lifters to be the issue. I'll keep updated on status of cam, etc. I think I'll trade this lemon in on a diesel or anything without AFM. Will also not be purchasing from Bob Howard GMC in Oklahoma City.
  9. 2016 Silverado LTZ 5.3L I had 8 injectors replaced at Chevrolet 5/13/19. Code read p050d (NoWarranty) Check engine light had come on before but it would go away. I just now took it in for injectors. Every time I’m in heavy traffic I get home and it ticks almost like a Diesel. Im saying diesel because I had a gas 2005 F150 that sounded like a diesel. There is No check engine Light on now. I know something is wrong. What could be the problem? What is it that can cause the motor to work extra hard and feel strained. I still feel a rough idle when I let go of the gas.
  10. I recently did a dod delete on my 2007 suburban. 6.0 200,000 miles. I thought the problem was the afm lifters being that there was a tick at highway speeds. I only had a tick at highway speeds. If I drove on the street I would never get the noise. As soon as I held a steady speed on the highway I would get what sounds like a lifter tick. The dod delete work was done by a Preformance shop. I do not think that dod was the problem. If I hold the throttle steady at 2000rpm while in park I can get the tick to come on. After I let the engine idle about 2-3 minutes the tick goes away. As soon as I hold the rpms back up it will come back and repeat the process. No loss of power while this is happening and no other sounds. Oil pressure is about 10-15 at idle and close to 40 while on highway. I would greatly appreciate any help.
  11. My 2008 5.3L 4WD Avalanche with ~135K miles has recently been throwing a P0306 cylinder 6 misfire, along with a Stablitrak warning. It first happened a couple weeks ago but only lasted a day. I cleared the code and it was fine for another couple of weeks before it happened again today. It does go through a lot of oil (probably a at every 1,000 miles), and there is a clicking sound. I know from researching this the last couple weeks that its likely failure of the #6 cylinder lifter and/or plug fouling due to the AFM system design and/or old PCV cover. I intend on doing some diagnostics this weekend including inspecting and replacing (if needed) plugs/wires/coils, doing compression tests, and pulling off valve covers to look for stuck lifters/valves. My questions are: 1) Other than the obvious, is there anything else I should be specifically looking out for when running these tests? 2) Are there are any other diagnostic tests I should be doing while I am in there. 3) Assuming compression test is fine, and replacing plugs/wires stops the misfires, can I hold off on replacing a bad lifter if there is one? 4) I would plan on getting a Range tuner to disable AFM (which I should have done when I bought the truck 3 years ago) and replacing the valve coverwith the new one. If the compression test is OK suggesting there is (currently) no ring, gasket, valve, etc. damage, would these measures stave off more issues? 4) If a lifter is bad and I really need to replace it now, can I just replace the one, or do I need to replace them all? Also, how difficult is it to take the passenger side head off to access the #6 lifters? 5) If it does fail compression, am I likely screwed and looking at a rebuild or replacement? 6) Any other advice, recommendations, or thoughts? Thanks in advance!
  12. If it is a lifter, what kind of lifters should I get for a 05 GMC 2500 HD with a 6.0 vortec? This video shows whats goin on. More to come as the information becomes available.
  13. After work tonight i noticed a rough idle every 3 or so seconds so i said what the heck and added some sea foam to the fuel, truck instantly smoothed out when i started it and the lifters went silent? Kind of confused. I did get a full syn oil change today at local dealer but the lifters made the noise still all day. Ive added sea foam to the crank in the past on my ford f250 and once on the silverado, but figured id leave just plain dexos in there for now and see what happens. But adding it to the fuel makes no sense to me? Could anyone chime in? Ill give an update after i drive a few miles tomorrow. Thanks, Mike.
  14. hi guys just to let people know the infamous lifter tic, isn't only gracing the 5.3 litters, it is alive and well in the 6.2. motor was torn down, and they believe they found a bad cam. i did inquire about a "better" cam, but they said that requires tuning and of course, the whole void your warranty thing. there was a gmt 900 5.3 having the same work done, so i wasn't alone. i am just a little pissed as my truck has 90 km's and this is an issue. i also, was under the impression that the 6.2 was bullet proof. oh well, they say the new cams and lifters are "better".....rrrrrriiiiiggghhhhhttt. positives from this...new rad fluid, new spark plugs and a fresh oil change (even though it had only about 900km on it) = some p.m. cost savings. also, they found two lines that needed replacing, the oil cooler line and ???. thank god for extended warranty as these were supposedly 700 bucks!!! cheers
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