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2019 GMC Canyon
2019 GMC Canyon
SLE - V6 3.6L
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  • Guides
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  • GMC Canyon
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  • 2019
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  • How to Change Transmission Fluid on a 2019 GMC Canyon (Sealed 6-Speed/8-Speed)
[HOW TO] 8L45 - 8 Speed Transmission Fluid & Filter Change for 2017-2022 Chevy Colorado & GMC Canyon

[HOW TO] 8L45 - 8 Speed Transmission Fluid & Filter Change for 2017-2022 Chevy Colorado & GMC Canyon

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Tools & Fluids

3 Ton
3 Ton
Floor Jack
3 Ton
3 Ton
Jack Stands
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How to Change Transmission Fluid on a 2019 GMC Canyon (Sealed 6-Speed/8-Speed)

Step-by-step drain-and-refill with required tools, fluid temp level-set procedure, and safety tips

How to Change Transmission Fluid on a 2019 GMC Canyon (Sealed 6-Speed/8-Speed)

Step-by-step drain-and-refill with required tools, fluid temp level-set procedure, and safety tips

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🔧 Canyon - Transmission Fluid Change (Drain & Level-Set)

On your Canyon, the automatic transmission uses a sealed-style fill/level-check setup, so the fluid level must be set at a specific fluid temperature with the engine running. Before I give you the exact plug locations, fluid spec, capacities, and torque specs, I need to confirm which transmission you have because the procedure and specs differ.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours


⚠️ Safety & Precautions

  • ⚠️ Work on a level surface; support with jack stands, not the jack.
  • ⚠️ Transmission fluid can be hot; wear gloves and safety glasses.
  • ⚠️ Engine will run during level-setting; keep hands/clothes clear of rotating parts.
  • ⚠️ Keep the truck level front-to-rear and side-to-side during the level check.

🔧 Required Tools

You'll need the following tools for this repair:

  • Floor jack (rated 3-ton minimum)
  • Jack stands (rated 3-ton minimum)
  • Wheel chocks
  • Safety glasses
  • Nitrile gloves
  • Drain pan (10-quart minimum)
  • Fluid transfer pump (hand pump)
  • Shop rags
  • Infrared thermometer
  • OBD2 scan tool that reads transmission fluid temperature (specialty)
  • Torque wrench (10–80 ft-lbs range)
  • Socket set (metric)
  • Hex bit socket set (metric)

🔩 Required Parts

HowToo sells all the parts you need for this repair:

  • Automatic transmission fluid (correct spec for your transmission) - Qty: Varies
  • Transmission drain plug seal (if equipped) - Qty: 1
  • Transmission fill/level plug seal (if equipped) - Qty: 1

📋 Before You Begin

  • Park on level ground, set the parking brake, and chock the rear wheels.
  • Raise the truck and support it on four jack stands so it sits level.
  • Plan to check fluid temperature with a scan tool; this is required for an accurate level set.

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm which transmission you have

  • Use an OBD2 scan tool that reads transmission data (specialty) and look for the transmission model/strategy, or tell me whether your Canyon is a 6-speed or 8-speed.
  • If you’re not sure: when driving normally, does it shift up to 6 or up to 8 gears?
  • Once confirmed, I’ll give exact fluid type, plug locations, and torque.

Step 2: Tell me your goal (so I give the correct procedure)

  • Reply with one: Drain & refill (typical DIY service) or Full exchange (requires more equipment).

✅ After Repair

  • After the correct level-set is done, road test and verify normal shifting.
  • Recheck for leaks around the drain and level/fill plugs.

💰 DIY vs Shop Cost

Shop Cost: $250-$550 (parts + labor)

DIY Cost: $70-$200 (parts only)

You Save: $180-$350 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-3.0 hours.


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