Results 1 to 3 of 3

Thread: 8l45 interchangeability - 8L45 experts come on in!

  1. #1
    Advanced Tuner
    Join Date
    Aug 2006
    Location
    Arizona
    Posts
    358

    8l45 interchangeability - 8L45 experts come on in!

    Hey guys, I have a really quick question.

    My daughter's 2019 GMC Canyon with the 8L45 transmission recently had trans failure. I found an 8L45 out of a 2021 GMC Canyon I can get. My question to you folks is, is the transmission interchangeable since the TCM is external?

    Please excuse my inexperience with the 8l45 as I am mostly familiar with the V8 GM transmission interchangeability.

    Thank you in advance!
    2009.5 PBM G8 GXP M6 W/Roof-Self tune, OBX LTs, Kooks axleback, LSA blower, cam,
    Monster LT1-SC clutch, flex fuel, 12 psi [email protected] 1,800 D.A
    2007 TBSS-Self tune, bolt ons [email protected], 1,900 D.A
    1991 GMC Syclone- Self tune/catback 12.8@104, 4,200ft D.A

  2. #2
    Tuning Addict blindsquirrel's Avatar
    Join Date
    Apr 2017
    Location
    Meridian MS
    Posts
    9,436
    https://www.car-part.com

    screenshot.16-12-2023 14.35.52.png

    Too many options, not enough info. That site is where I would start though by looking at which other years were listed in the results.
    GM Gen4 Injectors v2.1.xls
    "My life has become a single, ongoing revelation that I haven't been cynical enough."
    Funny how accounts marked as 'banned' are still able to log in and do stuff on the site, huh?

  3. #3
    Tuner in Training
    Join Date
    Feb 2019
    Location
    West Palm Beach, FL
    Posts
    10
    If the truck is 2WD, it has the M5N variant .. which is used in 2WD trucks and many cars and SUVs. If it's a 4WD truck, it uses the M5T variant.