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CARFACTBOOK / DIAGNOSTIC REFERENCE

Start with the symptom. Follow the evidence.

Choose a symptom and your exact chassis when possible. Each next check follows the result you record—not a guessed failed part. CarFactBook keeps a traceable path and prepares a practical mechanic handoff.

Symptom first

What are you seeing?

Won't start / hard starting

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

Warning light or message

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

Overheating / running hot

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

A/C not cold

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

Suspension / steering

Vibration / shaking

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

Brake problem

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

Hybrid / EV system

Hybrid-system problem

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

Fuel / emissions

Poor fuel economy

Check reviewed reports for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US.

Choose an exact vehicle

Make, model and chassis code

Selected: Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US · 2025

Diagnostics v3 · Structured symptom flow

Poor fuel economy — structured test-result path

0 results recorded

Next reachable check

Is the fuel-economy change based on repeated tank/trip measurements?

A repeatable measurement is more useful than a single dashboard reading.

Mechanic handoff summary

Further evidence required. 0 reachable results recorded.

Results stay on this page until you leave or change vehicle/symptom. Optional saving stores only this v3 session on this browser, separate from Garage and Vehicle Passport. It is not uploaded or shared. References are refreshed from CarFactBook when you return.

Preparing Diagnostics v3 handoff…

After a mechanic checks or repairs the car

Close the loop with the actual diagnosis, repair, part, cost and follow-up. The exact vehicle, symptom area and the test-result path above are prefilled, but you can edit them before submitting.

Choose an exact vehicle above to prepare a repair-outcome report.Reports remain pending until CarFactBook reviews them. A diagnostic path or external test result never becomes a confirmed diagnosis automatically.

Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US

Useful references for your exact car

These references relate to the selected symptom. They do not identify a faulty component or recommend replacing it. Confirm equipment, production period and source caveats for your individual car.

Verified facts

Engine oil capacity →

5.5 US qt (5.2 L) with an aluminum oil pan, or 6.0 US qt (5.7 L) with a plastic oil pan, with filter; identify the installed pan before filling (GM TechLink MY2025 chart)

Canyon AT4 4WD 4SG L3B MFC MY2025 US only. US MY2025 Canyon AT4 4WD, group 4SG (T4E43); L3B, MFC and KL9 standard per native GM order-guide Mechanical column F; VIN series 2D and engine K=L3B per GM VIN standard REV9 p.39. Quantity depends on the installed oil-pan material, which the order guide does not identify; identify the pan before filling. The Canyon owner's manual (printed p.347 / PDF p.348) prints only 5.7 L / 6.0 qt with filter, the chart's plastic-pan value, without naming the pan.

General Motors / GM TechLink · Verified 2026-11-05

Reviewed repair evidence

Poor fuel economy

0 related reports

Reports are matched by related system category for Gmc Canyon Canyon AT4 4WD 4SG L3B MFC MY2025 US. Compare the recorded symptom and outcome; a repair on another car does not diagnose yours.

No reviewed match yet. CarFactBook will not manufacture a likely cause just to fill this screen. Check the exact vehicle facts or contribute a real repair outcome through Problems.

Immediate owner decisions

Urgent symptoms: fluid leaks, tire problems and warnings

A tire blowout, low oil pressure, slipping transmission or overheating can require an immediate safe stop. Choose the relevant owner-safety research before starting vehicle-specific diagnosis.

Tires · NHTSA guidance

Flat tire / blowout

Stabilize safely, identify when a tire needs professional assessment, and confirm the vehicle's placard.

Engine oil · owner research cluster

Oil leak / low pressure

Start with urgent low-pressure warnings, then compare small leaks, valve-cover, oil-pan, post-service and cost questions.

Gearbox · fluid-loss research

Transmission fluid leak

Fluid identification, dangerous shifting symptoms, post-service checks and a diagnosis-first estimate.

Cooling · manufacturer warnings

Coolant leak / overheating

Separate A/C water from coolant, observe the reservoir cold, and respect stop-driving warning signs.

Browse or contribute reviewed problem & repair evidence →