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    2017 Silverado 3500hd 6.0

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WT35002017's Achievements


Enthusiast (2/11)



  1. Just curious as to engine maintenance history, did you personally do the oil changes on the motor or did you have a service center or dealership do the oil changes, and at what intervals? I have 2 DOD Chevys and I’m wondering about the horrible trouble you’re having here.
  2. So true! I put a 180 degree thermostat in my truck to try to keep temps down a little, it runs at about 200 degrees. Doing a few modifications and heat can be the enemy. Fuel economy is not what I’m after but engine longevity is. Running cooler is not detrimental in any way as far as I know. I am hoping to extend engine life by running a little cooler when it can. If your radiator is allowing the engine to run that cool then it tells you that your cooling is more than adequate. If you want the engine to run at stock temperatures then just replace the thermostat with a stock one. It seems that the thermostat you have in there now is either not the stock part number/ temperature, or is stock but defectively opening early. No damage being done. 180 degrees shouldn’t even give you a CEL.
  3. It is a mechanical hydrostatic controlled fan, not electrically controlled. I wish it was a couple electric fans. It’s been working well, as soon as I come to a red light it will engage and disengages after getting up to around 30mph. It was like 93 degrees air temp in Orlando a couple days ago already!
  4. In an effort to run the truck at a lower engine temp I took off the fan to adjust the thermostat coil on the front of the fan clutch. It’s not adjustable like some aftermarket ones are so the bent the bimetallic coil out of its holding position a little to get er done. It will now “lock” the fan to spin at a lower temperature.
  5. Got my 180 degree thermostat in yesterday. It was such a pain to burb the cooling system. I put the front of the truck on ramps and squeezed the hoses. I had to start the truck, wait for it to warm up, turn it off, squeeze hoses, add fluid, repeat like 6 times. Then test drove it, then added more coolant, then parked it overnight, then added a little more this morning. I know there is some kind of tool for fluid filling that uses a vacuum pump but this is ridiculous. I may have to come up with a fill tap-in to put in the upper radiator hose because I will probably need to do more of this kind of engine work as time goes on. End result: runs about 10 degrees cooler. Used a Motorad 523-180.
  6. Even just a week after I bought my new 2017 Silverado 3500 WT I began having those problems and I pulled the fuses for ABS and traction control. I know that seems weird and I’m not saying you should do this but I grew up racing and never liked those features anyways. I tow a lot and this forced me to get a aftermarket trailer brake controller. This actually works much better than the stock one. Happier all around and I never had to deal with the dealership hassle that I read so many people have had to deal with over the years. Good luck, it is a GM issue that maybe or maybe not they can fix for you.
  7. Amsoil Signature Series is what I use in my 6L90 and it also qualifies as Dexron HP. I definitely recommend it, my transmission ran cooler and shifted smoother immediately after filling with it.
  8. Amsoil Signature Series is what I use in my 6L90 and it also qualifies as Dexron HP. I definitely recommend it, my transmission ran cooler and shifted smoother immediately after filling with it.
  9. 10-4, it is the new bung on the passenger side in front of the cat. In the picture the 4 old o2 bungs just have tape covering them, the new bung has a plug in it, because I painted it. Went for a test drive and wide band is working great.
  10. Took off cat section of exhaust today and welded in a bung for my new AEM wide band so I could use it with HPTuners to tune my engine. I built 4 ramps to easily lift my truck up 12 inches a couple months ago and they allowed me all the space I needed to take off the exhaust. It was easier to weld than I thought it would be. I used .030 flux core wire feed with no gas to weld on an ICT billet mild steel bung. It looks great after a bit of grinding to finish it. Wide band works perfectly and can’t wait to start learning the tuning processes as described in the HPTuners forum!
  11. Finally got Hptuners and did my first tune of the ECU and transmission, removing torque management braking and also removing torque converter lockup on gears 1-4. It’s a 6 speed. I’m very pleased with how it has turned out. Acceleration is smooth and fast compared to before. There is so much more I will change but I’ll spend some more time learning to use the scanner properly before I change shift points and other things. Still no wide band yet so engine tuning will have to wait.
  12. Unfortunately the dealership won’t pay me to spend my time going over with them what is wrong and needs to be fixed. The whole culture of the customer bowing down to the almighty corporations to me is just crazy. When I bought the truck I figured it would take me a little time to sort it out. If the fuel injection system was defective I would have just slapped a carb on it and been more than happy doing it too. As you can tell, I’ve owned a BMW before…
  13. I have looked at many of the posts here to see if anyone has done what I have to alleviate these vibrations but I don’t think anyone has. Background: I used to race 1/8 mile asphalt supermods so I never liked the thought of torque restriction electronics or ABS or traction control. I had the vibration problems even when my 2017 Silverado 3500hd WT was new, especially it was felt while slowly shifting from 2nd to 3rd and then to 4th. Modulation of throttle in higher gears also caused vibration. I removed traction control and ABS fuses and the vibrations are no longer present. Smooth as glass all the way to 90. I have dash lights now but in the future may be able to take them away with HPtuners. The truck is a different animal with this easy mod as acceleration is not hindered and is now instant. I am convinced that there are programming issues related to the transmission and torque control. The transmission, 6L90, now shifts firmly also. Love my truck, love every vehicle I’ve ever owned. I mostly tow with my truck so I had to buy a towing brake system since the factory one is disabled when I disabled the ABS. Totally worth it, the trailer brake is better than what came with the truck by far. Good luck to all out there!
  14. 2017 Silverado 3500hd. Had PO741 code and shudder that would come up while trailering on the highway, first time at around 35k miles. I noticed it would happen when my trans 6L90 reached temps of 200 or more. It even got up to 225 at one point. It would shift erratically and I felt sure the high temp was causing something to not work well. I installed a bunch of trans coolers since I would mostly be using the truck for towing. The extra cooling made it so the temp would no longer exceed 185 degrees even in the hottest of days in souther Florida. The trans coolers stopped the code from happening again and no other problems were observed. When I did this I installed a valve that would easily allow me to drain tranny fluid later because I wanted to change the fluid at around 45k miles. This I did and dropped the pan to clean everything out. I used Amsoil. The pan was pretty clean and I changed the filter. No metal shavings luckily. To change the fluid I would drain by opening my installed valve and let it drain into a marked bucket 1 quart at a time, replacing old quart with a new quart into the trans dipstick tube. I realize it it not really a flush but a good percentage got changed out. I did a total of 4 gallons this way. My truck hasn’t had any issues so far reaching 65k.
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