Chevy Colorado / GMC Canyon Transmission Guide by Year

The Chevy Colorado / GMC Canyon mid-size pickup has used several transmissions. Heres what is in your truck by year and what to watch for.

Shop rebuild kits and parts by transmission

Get the parts for this repair
Shop 4L60E Parts →

2004-2012 Colorado/Canyon (Gen 1):

4L60E (2.8L L4 / 3.5L L5 / 5.3L V8 - Z71):

  • 4-speed automatic
  • ~340 ft-lb stock
  • Standard for most trims

    • 2015-2022 Colorado/Canyon (Gen 2):

    6L50 (2.5L L4 / 3.6L V6):

  • 6-speed automatic
  • Smaller version of 6L80
  • ~370 ft-lb stock

    • 8L45 (2.8L Duramax diesel, 3.6L V6 some years):

  • 8-speed automatic
  • Smaller version of 8L90
  • ~400 ft-lb stock

    • 2023+ Colorado/Canyon (Gen 3):

    8L80 (2.7L Turbo):

  • 8-speed automatic
  • HD version of 8L45
  • ~400-450 ft-lb stock

    • How to ID your trans

    By year + engine:

  • 2004-2012 4-cyl/5-cyl: 4L60E
  • 2004-2012 5.3L V8: 4L60E or 4L65E
  • 2015-2022 2.5L/3.6L: 6L50
  • 2015-2022 2.8L Duramax: 8L45
  • 2023+: 8L80 most trims

    • VIN lookup:

  • RPO code on glove box sticker
  • M30 = 4L60E, M70 = 6L50, etc.

    • Common failures by trans

    4L60E in Colorado:

  • 3-4 clutch wear (smaller capacity = wears faster)
  • Sun shell stripping
  • TCC shudder
  • Pump bushing

    • 6L50 in Colorado:

  • Solenoid pack failure
  • TCC shudder
  • Less HD than 6L80 (smaller clutches)
  • Fluid sensitivity

    • 8L45 in Colorado:

  • 3-5-7 clutch shudder
  • Mechatronic harness
  • Fluid sensitivity (ATF LV required)
  • 2.8L Duramax stresses this trans

    • Diesel-specific issues (2.8L Duramax + 8L45)

    Why this trans struggles:

  • Designed for V6 truck (light-duty)
  • Diesel torque (369 ft-lb) overworks it
  • Heat builds in stop-and-go
  • Read our 8L90 family info

    • Symptoms:

  • Harsh shifts
  • Slip at takeoff with load
  • Shudder under cruise
  • Service overdue often

    • Tuning limits (limited stock-engine HP)

    3.6L V6 tuning:

  • Bolt-ons OK to ~330 HP
  • Trans rarely the limit at stock HP
  • Cammed: stock trans marginal

    • 2.8L Duramax tuning:

  • Tunes add 50-100 ft-lb
  • Stock 8L45 starts wearing fast
  • Service interval critical

    • Rebuild costs

    4L60E rebuild (mid-size):

  • Stock: $1,500-$2,500
  • HD: $2,500-$3,500

    • 6L50 rebuild:

  • Stock: $2,500-$3,800
  • HD: $3,500-$5,000
  • Limited aftermarket vs 6L80

    • 8L45 rebuild:

  • Stock: $3,000-$4,500
  • HD: $4,500-$6,500
  • Very limited aftermarket

    • Fluid spec

    4L60E:

  • Dexron VI
  • 11 quarts

    • 6L50:

  • Dexron VI
  • 8 quarts

    • 8L45/8L80:

  • Mobil 1 ATF LV ONLY
  • 8 quarts

    • Service intervals

    Daily light use:

  • 4L60E: 50k miles
  • 6L50: 50k miles
  • 8L45/8L80: 45k miles

    • Tow use:

  • All trans: 30k miles
  • Aux cooler recommended

    • 2.8L Duramax tow:

  • 8L45: 25k miles
  • Aux cooler MANDATORY
  • HP Tuners or EFI Live tune for trans temp

    • Colorado-specific recommendations

    Off-road use (ZR2, Trail Boss):

  • Aux cooler for sustained low gear use
  • HD pan with skid plate
  • Trans temp gauge install

    • Tow use (Colorado max tow):

  • Aux cooler mandatory
  • Tow/Haul mode every time
  • Service every 25-30k miles

    • Daily commuter:

  • Stock service intervals
  • Avoid heavy load
  • 4L60E ages better than 8L45 in stop-and-go

    • Pre-purchase used Colorado check

    Drive test:

  • All gear engagement
  • TCC apply smoothness
  • WOT shift quality
  • Hill climb behavior

    • Red flags:

  • 3-5-7 shudder (8L45)
  • P0741 (TCC shudder)
  • Burnt fluid smell
  • Tuned 2.8L Duramax without records

    • If trans is failing

    Repair vs replace decision:

  • Truck under 200k miles: repair worth it
  • Truck over 250k miles: consider used trans
  • 2.8L Duramax with 8L45 failure: very expensive ($4,500-$6,500)

    • DIY rebuild (4L60E):

  • $800-$1,500 parts
  • 20-30 hours work

    • DIY rebuild (6L50/8L45):

  • $1,500-$3,000 parts
  • 25-35 hours work
  • Specialized knowledge required

    • Need Colorado/Canyon transmission rebuild parts? Shop our catalogs: 4L60E | 6L family. Master kits, HD upgrades. Free shipping over $70.

    Related: