Generations: what changed, and what you can actually specify
Generation-to-generation comparison that the numbers support:
2 generation (2000-01-01 to 2006-12-31). Body: SUV 5-doors. Versions in the catalogue: 0. Production window: 2000 through 2006 inclusive. You can identify the generation by years and body type. You cannot pick an engine, gearbox, or drive from this file, because none are listed. A used 2 generation Yukon XL is a generation choice, not a version choice.
5 generation, restyling (start 2024-08-01, stop not measured). Body: SUV 5-doors — the same body label as the 2 generation. Versions: 1, named 6.2 V8 AT. Restyling is not a third model line; it sits inside the 5 generation. Calendar overlap with the 2 generation is zero: the older run ends 2006-12-31, the restyling run starts 2024-08-01.
Generation-to-generation comparison that the numbers support:
| What you can compare | 2 generation | 5 generation, restyling |
|---|---|---|
| Years | 2000-01-01 – 2006-12-31 | 2024-08-01 – not measured (in production) |
| Body | SUV 5-doors | SUV 5-doors |
| Versions listed | 0 | 1 (6.2 V8 AT) |
| Engine / gearbox / drive in data | not measured | Gasoline 6162 cc, 420 hp, 10-speed Automatic, AWD |
Same body type, different completeness. The restyling generation is the only one where “which version” has a name.
GMC Yukon XL specs: the only version table
One row. Name exactly as in the database.
| Version | hp | kW | Nm | Displacement (cc) | Fuel | Cylinders | Layout | Boost | Gearbox | Gears | Drive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 6.2 V8 AT | 420 | 308 | 624 | 6162 | Gasoline | 8 | V-shaped | No | Automatic | 10 | AWD |
Fuel grade in the data: 95. Injection: Direct injection (direct). Engine position: Front, longitudinal. Valves per cylinder: 2. Bore × stroke: 103.25 x 92. Compression: not measured. Power rpm and torque rpm: not measured.
There is no second row to rank against 6.2 V8 AT. Engine options in this catalogue equal one option.
GMC Yukon XL engine: power per litre and what the extra capacity is for
6.2 V8 AT displacement is 6162 cc, which is 6.162 litres.
- Horsepower per litre: 420 ÷ 6.162 ≈ 68.2 hp/L
- Kilowatts per litre: 308 ÷ 6.162 ≈ 50.0 kW/L
- Torque per litre: 624 ÷ 6.162 ≈ 101.3 Nm/L
- Torque per horsepower: 624 ÷ 420 ≈ 1.49 Nm/hp
- Total valves (8 cylinders × 2 valves): 16
- Bore is larger than stroke: 103.25 mm vs 92 mm; difference 11.25 mm. That is an oversquare geometry as written in the data, not a separate engine family.
Boost is No. Output of 420 hp / 624 Nm is therefore naturally aspirated on this version. There is no turbocharged alternative in the table to buy “instead.”
Cylinder count and layout are 8 and V-shaped. Do not substitute other layouts: they are not in the file.
Gearbox on 6.2 V8 AT is Automatic with 10 gears, drive AWD. With one version, you are not choosing between 2WD and AWD or between 6-speed and 10-speed. You are choosing this combination or leaving the model.
Performance, mpg, and reliability figures that are not measured
For 6.2 V8 AT:
- 0–100: not measured
- Top speed: not measured
- City / highway / combined consumption: not measured
- CO2: not measured
- Eco class: not measured
A “which version is quicker” or “which version uses less fuel” ranking cannot be built from this dataset. The 2 generation has the same blanks plus no engine row at all.
Searches for GMC Yukon XL engine problems, engine recall, engine oil, and engine air filter are real buyer questions. This catalogue does not list failure rates, recall IDs, oil capacity, or filter part numbers. Those topics are not measured here; they are not evidence for or against 6.2 V8 AT.
GMC Yukon XL dimensions, weight, wheelbase, length
Kerb weight: not measured. Gross weight: not measured. Ground clearance: not measured. Fuel tank: not measured. Wheelbase, overall length (mm, cm, m, or feet): not measured.
Weight per horsepower cannot be calculated: mass is missing, horsepower is 420. Length-in-feet comparisons between generations cannot be calculated: length is missing on both.
What is measured on 6.2 V8 AT is wheel size, three options:
- 275/60 R20
- 275/50 R22
- 285/40 R24
Diameter steps: 20, 22, 24 — a span of 4 inches between the smallest and largest listed rim. Aspect ratio falls as diameter rises: 60 → 50 → 40. The 24-inch tyre is also the widest (285 vs 275). Suspension on this version: Independent, spring front and Independent, spring rear. Brakes: Ventilated disc front; Disc ventilated rear (label as in the data).
Wheel choice is the only hardware fork inside 6.2 V8 AT. It does not create a second named version.
Which version to choose
If you need a spec sheet you can quote: take 6.2 V8 AT on the 5 generation, restyling (from 2024-08-01). It is Gasoline, 6162 cc, 420 hp (308 kW), 624 Nm, 8 cylinders V-shaped, boost No, Front, longitudinal, Direct injection (direct), Automatic 10, AWD, fuel 95. Power density is about 68.2 hp/L and 101.3 Nm/L. That is the entire measured offer.
If you are looking at a 2 generation (2000–2006) Yukon XL: you are buying a generation with SUV 5-doors body and 0 catalogue versions. You cannot match it to 6.2 V8 AT, and you cannot compute a horsepower or gearbox delta versus the restyling car.
If you searched Denali, AT4, Denali Ultimate, price, or for sale: those strings are not version names in this file and there are no prices. They do not split 6.2 V8 AT into extra rows. Extra money for a trim badge is not measurable here.
If you wanted a second engine: there is none listed. Engine size, horsepower, and engine specs collapse to one line. “Engine options” = 6.2 V8 AT.
Practical rule from the arithmetic: with one named version, the buy decision is restyling 6.2 V8 AT versus a 2 generation example that has no version row. Same body type (SUV 5-doors), different completeness: 1 measured powertrain versus 0. Dimensions, weight, tank, 0–100, top speed, and mpg stay not measured on both, so they cannot break the tie. Wheel size (20 / 22 / 24) is the only in-version choice, and it does not change the version name.