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Hey need help. My son total out a 2009 GMC with a 6.2 and 6l80e trans. I have the truck and all. Looking to put it in a 1997 GMC truck. I am trying to figure out how to get the trans. to work and know what gear I'm in. Do they make harnesses for this or control modules for this. Thanks for any help.

2017 1500 SLT, 52kmiles, stock other than GM/Borla. Truck is never used for towing, but is my daily driver. I noticed recently there is an "odd" upshift between 2nd and 3rd at random times. Usually after driving for a while. Took it in to the dealer who says all is good, no burned fluid and can't duplicate the issue--they say they took it up to ~190. I drove the truck about 470 miles this weekend on vacation after dealer cleared it, but monitored the tranny temps more closely and noticed on the long highway drive with minimal cargo/passengers temp is sitting around 225-232. Ambient temps in the upper 90's. This seems high to me with very little load, but I never really paid attention to temps prior to the shifting issue... so no baseline to compare to. What temps are expected/normal?

I have a 2019 Silverado LD with 21k miles on it. I noticed that if I'm in manual mode, I get a hard downshift from 3-2. No other gears. It does it off and on. What could it be?

Okay, after 11 months of agonizing mishaps, set backs and over all triumph, I figured it was time to immortalize my truck in a new post. Please welcome my 2014 GMC Sierra 1500 7.0 (427) Turbo Build! Block: Texas Speed and Performance Darton sleeved boost ready block; 7.0L (427). TSP Forged wet sump crankshaft 4.0" stroke 6.125 Boost specific billet I-Beam Rods CP 4.125 -12cc Dish Pistons w/upgraded wrist pins. Clevite main bearings Clevite rod bearings ARP Main stud kit Cylinder Heads/ Intake Precision Race Components ported Cylinder Heads w/ valve job PAC spring/ Valve Kit. Comp Cams rocker arms/trunion Texas Speed & Performance SV Camshaft +30% fuel lobe TSP AFM delete kit Lingenfelter ported 95mm throttle body Ported L86 intake manifold. All ARP bolts or studs. Fuel: GM ZR1 high volume fuel injectors GM ZR1 fuel pump (high side) Armageddon 465 LPH in tank fuel pump (low side) Snow Performance Stage 3 Meth Kit with controller and braided lines. Turbo: Borg Warner S480 T6 Turbo 1.32 AR billet 110/96mm. Turbo smart 50mm BOV Turbo Smart 60mm waste gate Pro Boost controller fully titanium wrapped exhaust Cooling/Oil separators Mishimoto fully aluminum Radiator Mishimoto R-Line Intercooler 31x 12x 4” Mishimoto HD Trans Cooler 2X Mishimoto Black Aluminum catch cans. Mishimoto 180 degree thermostat. Transmission/driveline: Circle D pro 3 torque converter 2700 stall. Custom 5" 6061 aluminum driveshaft rated for 1,200hp 7,300trq MORE to come. I need to get the final tune with the new block. Still runs very well on the old 6.2 tune however, going up to 7.0 adds a layer of goofy on vacuum or under boost.. Next steps Get the PATC Stage 4 transmission kit stuffed into my 6L80E and retune to 900+ whp! Hoping to have that underway around March! Let me know what you all think. Ask any question. I'm open to where I purchased parts, cost of build etc. especially my opinion getting into a build like this.

Hey guys, new to the forum. I have a 2016 Silverado 1500 with the dreaded whine that seems to be the torque converter. I am almost certain that is what it is. The only video I’ve found that has the same exact sound is here How hard is it to pull the transmission just to swap out a nee TC? Does that sound like the TC or the pump? Anything I need to be sure I do? Truck is still driving fine, but not sure for how long. Any tips would be appreciated. Also looking for the best TC that will last.

I had purchased AMSOIL Signature Series ATF for my 18 Silverado - 6 speed. After having it sit for a while and never getting to a transmission flush on my own time, I called a local, honest, reputable transmission shop near me that has always treated my dad very well. They’re a no-bull, honest shop, and the owner is down to earth and knowledgeable regarding transmissions, as he should be. I informed him I had AMSOIL and wanted it switched with that, and he advised that for the 6L80E, it wasn’t a great idea. He has nothing against a better fluid, but he advised that AMSOIL doesn’t treat the electronics nicely, and it’s a common issue. I’m an AMSOIL guy, and do want him to use the AMSOIL fluid, but has anyone else heard of this or advise to simply use DEXRON VI and NOT AMSOIL?

So I've been dealing with this clunk on my '14 6.2 Sierra crew s/b. It is most noticeable when letting of the gas in second gear, but is also noticeable in higher gears to a lesser degree. It will clunk every time I let off the gas in second gear. The driveline will absolutely not clunk in first gear. The first time I took it in to the dealer the service manager rode with me and agreed that the clunk didn't seem normal and suspected the rear axle or driveshaft was the culprit. I was pleased that he appeared willing to dig into the problem and was hopeful for a resolution. Later that day I returned to pick up the truck and was told that they performed the TSB relating to torqueing the shackles and U bolts. I didn't expect that to fix the problem and it certainly didn't. I brought the truck back shortly after and they checked for any TCM updates to no avail and opened a case number with GM. After that they handed me the TSB stating that clunking is normal. Yesterday I went in for an oil change and told them I'm still not satisfied with the low speed clunky driveline of this truck and asked to drive one of their loaners to compare the low speed driving characteristics. The truck I drove had no noticeable clunking at all. This test drive only reinforced my belief that something in not right with mine. Of the 5 late model full size GM 4x4 vehicles I've owned none of them clunked like this 2014. An occasional clunk is to be expected especially in a 4WD and I could live with that, but this thing clunks all the time! This does not seem appropriate for what is otherwise a very nice driving and expensive vehicle. I am totally frustrated with how my dealer and or GM is handling this case. Has anyone had any luck getting this type of issue fixed? Any insight is appreciated.