Chevy Silverado and GMC Sierra Forum banner

Discussions Showcase Albums Media Media Comments Tags Marketplace

1-20 of 78 Results
  1. Vortec 5300 5.3L V8
    Well, I just read a thread that said it would be a lot of work to do the wiring harness with a buildup from a 5.3 to a 6.0 so now my question would be to go with a remanufactured or rebuilt 5.3 and is it worth it to get all of the upgrades for performance, I’m not sure what upgrades they really...
  2. EcoTec 5.3L V8
    I have a 2002 Chevrolet Silverado 1500 Extended cab It had the 4.3, I lost compression on cylinder 4 so I went ahead and pulled it, the fuse box, the engine harness and in its place put my 4th gen 5.3 (LY5 2007-2014) Edit: it has a gen 3 intake and coils, egr plug on the intake has been...
  3. 🙋‍♂️ Member Introductions
    Hey everyone! Here’s my 2009 Silverado 5.3 4x4. Has a 6 inch rough country lift and is currently sitting on 37x 13.50’s on 20x12 LRG Wheels.
  4. Vortec 5300 5.3L V8
    So I've decided since I'm going to keep my truck another 4 or 5 years and I have over 300,000 mi on the engine. It's time to fix all the oil leaks and go ahead and slap in new bearings, seals, rings, Pistons, etc. Initially I had planned to pull the heads off before pulling the block and go...
  5. Vortec 5300 5.3L V8
    So I have a 5.3, I run a V8 chip to do away with the V4/V8 default setting. Didnt like the way the truck drove before i got it. Been loving it ever since. Long story short I went for a sticker today and I failed emissions. Catalyst not ready, Oxygen sensor not ready, Oxygen sensor heater not...
  6. EcoTec 5.3L V8
    Hey! So, 2014 Silverado w/ 5.3L, I think it's the eco? Anyhow, it's running 120k ish, has new battery, new alternator, same issue w/ different new battery. It was happening on old alternator as well, but figured I'd try. After about 2wks the battery will be dead. Once its getting close to...
  7. Vortec 5300 5.3L V8
    Hey fellers. Got a 1990 GMC Sierra 4x4. Truck has an LS swap in it, 5.3 out of a 2006 Tahoe. Transmission and the all the rest of the running gear/drivetrain is original to the truck. I know next to nothing about LS engines, and I'm stumped. The swap was done with the original computer from...
  8. 🛻 Uncategorized Truck Topics
    Hello everyone, I’m currently looking at buying a 2015 Silverado with the 5.3 in it. It’s got 140,000 kms on it and I’ve heard that if you buy something to keep it out of fuel management mode, a catch can, and change the thermostat that it should be good. Is there anything else I should be...
  9. Vortec 5300 5.3L V8
    My truck will start right up in the cold at a high idle but then will stall out after a few seconds. This issue only occurs whenever the temp dips below around 40 degrees F. Getting engine codes P0171 & P0174. Truck also sputters and acts like it's going to die when it rains. Something is...
  10. Vortec 5300 5.3L V8
    Hello All, I have a 2012 Silverado 5.3 LT. extended cab. I have had a weird issue, and not been able to get anywhere with it. I will start my truck, drive for about 30 seconds and come to a stop at a light in front of my house. The truck will idle poorly, misfire. Sometimes I will hit the gas...
  11. 4-Speed Automatic Transmission
    I’ve been noticed a grinding noise more and more lately in my 02 sierra 5.3. It sometimes comes around slightly at idle but I mostly hear it when accelerating and when the rpm’s increase when the trans downshifts. I’ve idled it in neutral and find it will still make that noise so I don’t think...
  12. Vortec 5300 5.3L V8
    Hey everyone first time posting here. Love my truck/ gmc, but this issue is a nightmare. 2008 gmc sierra 1500 5.3 Vin M, 4x4. The engine hasnt been modified. I will try to provide as much info as possible. I have already done the diagnosing/ replacing and am now back to square one it seems...
  13. Vortec 5300 5.3L V8
    So I had a fun time with coming up to 250k mark think I fixed most of my oil leaking need to do the oil pan, however after doing the crank cam and ops, I then moved onto the rough idle thats been there since I got the truck and also started to get a ses light flash I want to do at the rail...
  14. Vortec 5300 5.3L V8
    So when I first stop and start the idle no smoke comes out. But after idling for 5+ minutes smoke starts to come out the exhaust pipe. When I drive the smoke goes away and everything seems fine Also I had just recently got my oil changed 4 months ago and the oil level light came on. So I...
  15. Exhaust
    I have a 2016 gmc Sierra 5.3 I noticed today while doing an oil change that the passenger side manifold bolts were wet upon further inspection realized it was coolant from the research I did people only had that problem on 04 Colorado’s they said to just add sealant Is the head bad? It doesn’t...
  16. Vortec 5300 5.3L V8
    So I know get a new assembly even though the pump is whining just fine, and the check valve is going out. What I want to know though is it worth to just cut the main line and install a out side check valve before the fuel filter. Thinking about high pressure hose barbbed end or even just doing...
  17. Vortec 5300 5.3L V8
    01 Silverado 1500 5.3 241k miles I know I have a coolant leak at my heater hose connector and it's a slow leak, and found it while Chasing an oil leak, finally got UV dye because after everything I ended up leaking fresh oil, seen the dye on the bell housing and and coming down both sides...
  18. Vortec 5300 5.3L V8
    In a seperate thread I'm having a discussion about removing and rebuilding my transmission, and possibly the tcase. Since they're both out, I "might as well" do things and stuff to the motor, right? Right! Because I needed more stuff to do. :) The thing I really want to understand is: where...
  19. EcoTec 5.3L V8
    This tick noise recently popped up on my 2016 GMC Sierra. Passenger side engine tick at idle, increases with rpm and goes away between 1500-2000 rpm, but returns when dropped back into idle. The tick occurs 75% of the time. After reading other forums and videos, it sounds like it could be a...
  20. Vortec 5300 5.3L V8
    2007 Sierra, new body style with 5.3 vortec. Hi all. I’m have a strange issue. recently my truck started randomly dying, One second it will run fine driving down the road, and all the sudden dead. Every time I get a p069e code, I hooked up my harbor freight code reader. it shows that when...
1-20 of 78 Results
Top