Transmission Oil and Filter Change GMC Yukon, Sierra, Chevy Tahoe, Suburban 8 speed 8L90

Check transmission temp at 95-113 degrees. Careful it will be hot and near the exhaust.
Transmission fluid MOBIL 1 LV ATF HP: Must use this kind for the 8L90 8 Speed! You will need about 7-8 quarts

Harness: 24298757 (most Dealerships have it on backorder since its new. Took me a week to get one they ordered from Michigan.

Transmission oil filter TF922

The concepts performed in all videos from Danny Johnson are for demonstration purposes only and are not guaranteed in any way as I am not a certified mechanic. The viewer holds the responsibility to research these procedures and perform them at his/her own risk.
Due to factors beyond the control of Danny Johnson, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Danny Johnson assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Danny Johnson recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of Danny Johnson, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not Danny Johnson. Always take proper safety precautions, including, but not limited to, wearing safety glasses, removing jewelry, properly securing the vehicle on jack stands, etc.

[bubba.watercraftj]

Great explanation.
Massaging the Y pipe down is a huge time saver. PRO Demand states to remove the cats/y pipe assembly 😂. And run the risk of exhaust leaks from removing a rusty exhaust component. I used my scan tool under the truck running in park until transmission temperature reached 95 degrees F then took the level check plug out. Worked great. Temp spec for level check is 95 to 113 degrees if I remember correctly.

[Gpeeler]

I really appreciate this video didn't even realize you needed a pump to remove the fluid and replace it.

[eduardobarrera]

Great video and explanations. I just did my 2016 GMC All Terrain stock 20” tires. My truck had started shuddering at 60k miles, but all my mileage is highway. I do all my mechanical work and after watching your video, it was a piece of cake. My pan came out easily, slid right out without loosening anything and I reused the original gasket after completing the cleaning and new filter. All pan screws were torqued as you explained, 7 qts out, 7 in, but I drilled a 1/2 hole on top of quart bottle cap and just changed from one bottle to the next using the Harbor Freight pump. Did the gear shifting then took it for a few mile drive, runs great.

[marlonhayes]

Thank you so much for this video!!! I was experiencing that hard/stuck shift bump really bad, and after reading the ASM about the fluid, was going to take it to the dealer to do the service. A nice day, music and time on my hands will save me SOOO much money!!! Thank you once again!!🙌🏽

[dantransam]

My sir this has got to be one of the best how to videos I ever watched. I was gonna take it to the dealer but ill do it myself😎

[timberwolf]

Hey Danny, I changed the filter and fluid yesterday (10 Aug 23) on my 2017 Yukon (Denali). (30K miles) My filter was sightly different with a seal I also changed (this vehicles filter had no metal clip on top & had a longer tube - no big deal) I used 7 quarts of the Mobile 1 blue label full synthetic ATF LV HD. I didn't have the shudder in 7th or 8th gear that some reported (higher mileage typically) but I had the bump when slowing down between 2nd and 1st gear. Verry happy to say it is gone as others have stated. Cheers.
Chris

[scottturner]

Just finished my transmission service on my 2016 Denali. Ran into an issue removing pan, and broke off the clip in the J solenoid valve. You definitely need to pry exhaust cross over down as shown when removing pan. I found it easier if I moved gasket off pan to reduce thickness at crossover. Same when reinstalling.

The replacement solenoid part took 3 weeks to obtain. There must be a lot of issues removing pans!

Also, when starting engine, I threw a series of codes. Truck would only drive in 2nd gear. Read codes with my code reader and thought new J solenoid was defective- however, after shutting down and restarting, codes cleared. Whew!

Truck is now running great! This video was very helpful!

[TheCustomGeek]

Excellent video! I have a 2017 Yukon XL Denali and I’m going to change my filter and fluid with a higher level of confidence than I had before watching this video!

[badassg]

Just did this fluid swap on my c7 corvette with the same trans. OMG the diff is amazing!! Car only had 39k miles but was having hard shifts and shuddering in gears 5/6/7. This INSTANTLY took all of that away. I was skeptical I can’t lie. The new fluid is much improved!

[ronbolinsky]

I only got 6 and 1/4 qts out of my 2018 Centennial Silverado with a 6.2L. 6 and 1/4 went back in. I didn't have to use the pry bar on mine, pan came out with no issues. Pain in the rear accessing them heat shield bolts though. Great video.

[ridesandriversNL]

Best 8L90 fluid change video on You Tube hands down!!

[flyer]

I’m going to try the pry bar method next time I do mine. Just did mine yesterday and could not get the pan completely out. Wiped the debris off the magnets as best as I could and pushed most of the fluid out. Put 7 qts in and it started coming out of the top fill hole. Heated it up to around 100 degrees and let the excess drain out.

[Syeworks]

Very informative. I changed the trans fluid/filter on my 82 f150, and I’m thinking about doing it for my 2015 Tahoe. This vid helped get over some of that fear of messing up lol

[dudebud]

Doing my 8 speed today. Thank you excellent explanation! Happy Holidays you all!

[juandob]

Thank you for the step by step video you saved me a lot of money!!! Video was spot on and doing it the way you described was flawless thank you again

[theartofshineandscale]

Danny, great video. Followed your instructions exactly. Did not have to add any extra fluid. You rock!

[union]

Just changed mine. Thanks for a great video and the tip with the floor jack and pry bar!

[cwsosby]

Great information here. If you have 8L90E transmission problems, changing the fluid (blue label) is only a temporary fix @ best!!! Which is contrary to what the dealer will tell you. These transmission are a junk.

[danielbonner]

Best video Ive found to do this. Thank you!!

[davelynne]

Thanks so much for this excellent video. It saved me a trip to the dealership. Best regards!