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Bull-Doser, Public domain, via Wikimedia Commons. Below you'll find the tightening torques for the GMC Sierra 4 in both Nm and ft/lbs. The first table contains the most-used torque settings. The tables after it contain all torque spec values I could find.2007-2016 Chevrolet Silverado 2500HD 6.0 (6L90) ... the logic is somewhat questionable. The fluid stays in the transmission until the thermostat opens up then will flow to the cooler. ... The most common simple DIY 6l80e upgrades that can be done with simple hand tools in your driveway without removing the transmission to tear apart are ...transmission fluid level if you have been driving: • When outside temperatures are above 90°F (32°C). • At high speed for quite a while. • In heavy traffic - especially in hot weather. • While pulling a trailer. To get the right reading, the fluid should be at normal. operating temperature, which is 180°F to 200°F.Duramax Engine LLY 2004.5 to 2005. In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.8L90 8 speed transmission thermostat TSB as well as Sure-cool thermostat problems? snakej200; Dec 14, 2022 ... 2018 Silverado 6.2L 8L90 8spd trans questions. snakej200;At 20p degrees it feels like transmission is slipping. many NEW GM has transmission issues . probably china components in the tranny .. you have to suckflush out all the tranny fluid and replace the filter .. then drive it several hundred miles .. drop the pan and see if the fluid/debris is clean or more muck..3. Aug 21, 2022. #13. My 2020 5.3l 10 speed Trail Boss is going in the shop tomorrow. Noticeable whine from the engine/transmission. No warning lights or hard shifting, just a whine. Dealer/service rep. said it is the 10 speed transmission, just from listening to it. I can sit at an idle and rev the engine.2018 Silverado 1500 Transmission Temperature . ... I have 2018, and the hottest it got was 200° but it was 110° outside. I installed the updated bypass valve, and now my temps are between 150° to 165° with outside temps being around 100°. Reply OGHamToast ... The thermostat that controls the fluid temperature has a checkered history. There ...The 2018 is the most reliable Silverado since the 2014 redesign, but it does have transmission and brake problems. 2018 Chevrolet Silverado 1500 Faces Problems Over Faulty Brakes and Overheating Transmissions ... In some cases, the 2018 model’s transmission has overheated and left drivers stranded. While both the six-speed and …Part number is 86774933I picked mine up from here: https://www.gmpartsstore.com/oem-parts/gm-f-s-valve-86774933Chevy Silverado 2018, Engine Coolant Thermostat with Seal by MotoRad®. State-of-the-art equipment, strict quality control, and functional testing to each thermostat ensure customers that they can trust the high-quality product used in... Offer precise pressure control Ensure the proper fit. $13.54 - $41.87.SKU 115020200 2019-2024 GM 3.0L Duramax Turbo Resonator Delete $129.99 Quick add. Quick ... SKU 125071000 2015-2022 Silverado/Sierra 1500 w/ 8L90 Transmission - Transmission Fluid Thermal Bypass Valve $89.99 ... SKU 228053000 2014-2022 w/ZF-8 Speed Transmission Heavy-Duty Cast Aluminum Deep Transmission Pan From $319.99After researching, I found out that the 2018 Suburban with the 6L80E has a transmission cooler thermal bypass valve from the factory. It does not allow fluid flow to the cooling lines to the transmission cooler located on top of the hvac condenser until the fluid temp reaches 190F.Description. Details. Info. Add another measure of protection and increase fluid flow to transmission cooler. Increase cooling capacity with this easy-to-install billet aluminum PPE Transmission Fluid Thermal Bypass Valve for the GM 6L80 6-Speed transmission. The OEM part has restrictive internal passages.

Jun 30, 2015 · Step 2 – Disconnect the radiator hose. Follow your lower radiator hose towards the engine. The hose leads to the thermostat, which is located on the passenger's side of the truck. Remove the hose clamp on the radiator hose with a pair of pliers. Pull the radiator hose off of the thermostat housing and allow more coolant to drain. Hey guys I have a 2015 GMC Sierra 1500 5.3 with the 6l80. Just got a new 6l80 put in my truck and noticed the trans temp was a little higher than the old trans. I plugged in my snap on scanner and it showed two different trans temps. One was transmission fluid temp which was about 190 which is normal.Jan 3, 2022 · In this video I will show you have to replace a 6l80 thermostat due to the overheating problems with the 6l80. If you haven’t done this or thought about doin... ... Transmission Service as Preventive Maintenance. Overall Trans Temps Run 20% Less ... I just took my 2015 Silverado on a 670 mile road trip. I have the 6l80. I ...

Oct 7, 2020 · The WCFab Transmission Cooler Thermostat Bypass Plug is a quick and easy install and will work with the following range of GM vehicles equipped with a factory installed transmission cooler thermostat bypass (6L80, 6L90, 8L90): 2017-2019 Chevrolet Silverado & GMC Sierra 2500HD/3500HD with 6.6L Duramax Diesel Use a bit one size smaller than the shank of the screw for tight threading. Drill until the bit pushes through the plastic. Now thread the screw in until the head is about 1/8" from flush with the thermostat housing. You will use the head to pry the plastic part out. I used wire cutters to pull the plug out.I just had the service bulletin with the 70c thermal bypass valve done three weeks ago at the dealer on my 17 Silverado 1500 5.3l 6spd. Put on about 1200 miles since then and the temps stay in the mid to upper 140’s now. I towed around 2500-3000 pounds for a few days and the temps stayed below 160. Transmission used to run between 190-210 ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. When performing transmission repairs on 2014-2019 Silverado and Sierr. Possible cause: Duralast Kit Thermostat Water Outlet 5168KT. Part # 5168KT. SKU # 932733. 1-Year Warrant.