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  1. Have a 2014 4.3 Silverado with around 180k miles. About two weeks ago I noticed that whenever I’m driving (any speed) and press the gas pedal halfway or more for about 5 seconds I notice it starts to go from normal 210° to around 220° once I start to see it go up I let off and it goes back down. I could let it idle with the ac on and it’ll never go past 210 only when I step on it even with the ac off. The coolant is always at the top, the fans turn on when the ac is on , I haven’t seen any leaks, the radiator hose is hot after driving and radiator doesn’t have too much build up on it from the
  2. I recently got a 2000 chevy s10 LS 4.3 v6 4wd that wont start it cranks no problem everything else works but the security light is always on it never flashes its solid i have tried the relearn procedure 10 times nothing i have scanned it for codes got none i have tried putting a ziptie tip in the passlock plug in and nothing i have found a forum that is having the same issue but they did the resistor and it didnt work for them i dont know what to do to fix it and get it to run i dont have the money and dont want to take it to the dealer so dont suggest that if you know how to fix it please let
  3. I have a 2006 4.3 V6 Silverado 1500 WT that as of yesterday will not start. The last time I drove the truck was about a week ago before I parked it at the house. Luckily, its in my driveway so I can work on it. I'm a little confused though on why its not starting. I have tested the fuel rail pressure and have 59lbs when the fuel pump is engaged and about 59-61lbs when I try to crank the engine. I've tested the spark on all 6 cylinders with an inline spark tester and have posted the video of the number 3 cylinder's test below. They all managed to light the plug up telling me I have
  4. Hi I have a 2015 Chev Silverado, 4.3 engine with a new engine put in 100,000km ago as oil pump went on it before. Now I have a miss on cylinder 5. I swapped coils from cylinder 5 to cylinder 1, new spark plugs put in on cylinder 5 and 3, put new spark plug wires on 1,3,&5. Got injectors all cleaned and tested. Checked and replaced the oil pressure filter on it. And still have a steady miss on cylinder 5 still, which is more apparent when the engine warms up. Did a compression test with cylinder 5 being at 130psi and cylinder 1 also being at 130psi and that was engine cold and hot . I
  5. Hey guys and gals, I'm new to the forum. I have a 1997 chevy 1500 with 4.3 vortec 5 speed. 2WD... I have pulled the bad 5 speed out. I'm going to replace it with an automatic....I have access to a th350, a 700r4, and a 96 model 4L60e. THIS IS A SCRAP-HAULING TRUCK THAT ONLY IS USED LOCALLY...THATS IMPORTANT, because a lot of people are going to have opinions on the Why?s of this swap. All im looking for is a simple way to use one of these trannys in the truck. Let me preface this by saying that I AM NOT going the route of replacing pcms, tcms, or anything of the like, if I dont have to.
  6. Hey guys and gals, I'm new to the forum. I have a 1997 chevy 1500 with 4.3 vortec 5 speed. 2WD... I have pulled the bad 5 speed out. I'm going to replace it with an automatic....I have access to a th350, a 700r4, and a 96 model 4L60e. THIS IS A SCRAP-HAULING TRUCK THAT ONLY IS USED LOCALLY...THATS IMPORTANT, because a lot of people are going to have opinions on the Why?s of this swap. All im looking for is a simple way to use one of these trannys in the truck. Let me preface this by saying that I AM NOT going the route of replacing pcms, tcms, or anything of the like, if I dont have to.
  7. I have a 1999 s10 blazer with a 4.3 motor i'm putting in a 2002 4.3 motor and the crank sensor whole is different what can i do? Are there any other differences i know about as well?
  8. Im swapping a 4.3 out of a silverado 2003 into a 1996 silverado trans is 4l60 e. Out of a 1998 jimmy they changed transmission to ls style for. 2003 4.3. Do they sell adapters for this. Or a special torque converter. Can I just use the ls to 4l60e adapter with new bell housing if I swap trans to 2003 it moves everything back 3/4 of an inch do I have to modify drive shaft trans mount
  9. I'm trying to swap 4.3 2003 into 1998 4l60e its done on ls swaps all the time I think I need bellhousing flex plate torque converter adapter anyone chime in no negative Nancy's please
  10. 2014 Silverado 1500 2wd 4.3l DI. 150,000 miles. Fleet vehicle with decos oil changes every 4,000 miles. Came in with a misfire. Counters showed cyl 1. Replaced plugs and wires (Delco). No change. Looked at injector balance and seemed to have a bad #1 injector. Replaced 1,3, and 5 injectors (delco) and the 2 stainless under manifold fuel lines. No change. Removed 1 and 3 plugs compression seemed very low on cyl 1. Performed induction service (BG). No change. Re-performed compression test. Much better 210 psi but still running like crap. Pulled left valve cover and removed #1 cyl rockers to clos
  11. Hi, first time posting on here, I hope I am not bringing up an issue that has been solved or brought up elsewhere. Here we go, I have a 2015 single cab swb 4x4 that came with a 4.3/6l80e, i have swapped this to a 2017 l86/ 8l90e. Truck was fully operational prior to swap no issues, upon completing the mechanical portion of the swap and starting the electrical checkout I have run into some issues. Truck will power up bcm/ gauge cluster with no issue/ lights but I have no ecm activation as fars fuel system coming on or engine rolling over. I am getting the following DTCs: 2535, U0100
  12. I'm looking at a 2015 1500 with a 4.3, 3.42 gears. I would add a leveling kit with 33x12.5s. What should I be expecting for gas mileage? Would a 5.3 get better MPG with the lift/tires? What is your current tire/lift/engine/mpg? I tried the search feature but couldn't find a ton of what I was looking for.
  13. 2017 Chevy Sliverado. Does anyone make a cheaper 4.3 LV3 intake tube, that goes between the airbox and throttle body, than Airaid? $169.00 is a lot of money for a curved piece of plastic. I just want to get rid of that huge piece of plastic so I can see the down the front of the engine. I could make one from a turbo plumbing kit, but it would be easier to plug and play. Thanks.
  14. Here's an issue that has me stumped. 2000 Silverado, 4.3, 200K mi. Truck runs great, no oil consumption. I have a very random oil pressure fluctuation, normally I have 40 psi (+ or - 5psi) pretty steady, not affected by rpm or temp. about 20,000 mi. ago I started getting a lifter tick on start up accompanied by crazy fluctuation in oil pressure relative to rpm ( 15psi at idle and 60+ at 3500) It will do this for maybe a week and then stop....no tick and steady oil pressure again. Truck has always had regular oil changes with quality oil (dino) and a Wix filter, I've tried Lucas oil additive, M
  15. I am really interested in swapping out my 4.3 Vortec for a v8 in my 2003 Silverado 4x4 5speed manual. Any tips or advice and what is needed for this swap? I have read some posts about this but they all have different info on what is needed and difficulty etc.. thanks!
  16. I picked up a 2018 Silverado custom with the 4.3 a few months ago, i love it so far but the only thing i dont like is that it is way to quiet compared to my old silverado. Has anyone put an exhaust on that makes a little more noise but dosen't make the v6 sound like a subaru? I want some noise out of this beast!
  17. GM/Chevrolets claimed tow rating doesn't add up when crunching the numbers between the 4.3 V6 3.42 model vs the 5.3 V8 3.08 model (2014-2018). Look at the last two columns in the below chart for torque (ft./lbs.) coming out the differential towards the wheels. (These numbers do NOT account for drive train loss, at the wheel ratio changes due to various tire sizes, and the engine torque was taken as published (383 for 5.3 and 303 for 4.3 V6). The ROWS are gears 1 (top) through 6 (bottom). The formula used was: Step 1) Transmission gear ratio multiplied by
  18. Hey fellas. New to the site. Just picked up a new 2017 Sierra 4.3 Ecotec3 a few weeks ago. As you can see by the pic, I wasted no time in sprucing her up. I did a ton of research on this new V6 prior to buying, and decided to give it a try. Anyway...Ive read alot (mostly from GM sources) talking about the performance benefits with with using E85 in this particular engine. The numbers are impressive, but I remain skeptical. Everything I've ever been told about Ethanol in flex fuel motors, is "stay away". The long term damage on metal components just isnt worth it.
  19. Thinking about doing this but not sure how it will sound? It's a larger V6 so I'm thinking, not bad? FlowMaster, Borla? This isn't something you can easily "take back" so I'm looking for people who have actually done it and are pleased with the sound. I'm not going to do it if it sounds like a "V6".
  20. I am hoping to start up a good conversation on upgrades/information/etc on the 4.3L V6 Ecotec3 engine. There isn't much info on here about it. Well...I can't be the only Silverado 1500 owner with that engine. Just looking to see what people have done. Any issues? Just a good informational forum/topic.
  21. 2015 Silverado Regular cab with 4.3 V6. Has just under 14,000 miles. The other day after work I drove to the store and was gone for about 15 min. I kept my phone plugged into the charger. Came out, started the truck and it acted like it was gasping for fuel. Almost like starting up an old lawn mower. It then started surging a few times until I hit the gas and gave it some real juice. Then it became normal. This has only happened one time but it scared me. The only thing different I've been doing lately is running E85 fuel. On my 3rd tank of E85. Temperature has been in the high 50s to mid 60s.
  22. Hello everyone! I recently purchased my first GMC sierra, 4.3l work truck to haul some kayaks and get me through the winter. while driving it home i tested the 4x4 and it all worked, the 4lo was a little clunky to get into but i had no problem engaging it. after a few miles i started hearing a clacking sound, it sounded a lot like a U-joint so i investigated when i got home and found it to be coming from the transfer case. there was a leak at the rear output shaft seal, so i replaced that and went to drain and put fresh fluid in, but to my horror there was almost nothing in there, and
  23. Yesterday my odometer turned 10,000 kms. on my trouble free V6 in my 2015 Sierra 1500 CC 4X4. I have used my truck for every type of task I would/will use it for and haven't once been disappointed. The V6 will provide more than enough power for the majority of people and is only lacking in the bragging rights enjoyed by its bigger brothers. I decided to do something about it because nobody riding I'm my truck can tell its not a V8 unless I tell them! (I did post this picture on the thread telling what you did to your truck today)
  24. I have a 2006 Silverado WT with the 4.3 and NV3500, and am in the process of ordering everything for a clutch swap within the next week or so. I'm almost fairly certain I want to go with an Exedy clutch kit, including master and slave cylinder. I've used Exedy before and have been happy with it thus far. What I really can't decide on is what brand flywheel to use. I'm leaning toward a Sachs NFW1055, but I've only seen one review on it and the person mentioned it was incorrectly balanced and it had to be sent back. Just seeing if anyone else has done a clutch swap on a 4.3 and what brands were
  25. I have a 96 GMC Sierra 1500 with a blown 4.3. I just want to put a another 4.3 in it. Could anyone tell me if I can use a 4.3 out of like an s10 or blazer? I know I'll have to swap things like harness, intake manifold, exhaust manifolds etc. But isn't the over all engine the same? And is there a year range I should stick too?i figured 96 to98 or so but I'm no gm expert. Thanks in advance.
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