The GMC Envoy II XL, specifically the variant equipped with the 5.3i V8 engine, four-wheel drive, and a four-speed automatic transmission, was produced for the 2003 and 2004 model years. This iteration of the Envoy, built on the GMT370 platform, represented a mid-cycle refresh of the first-generation Envoy, aiming to enhance its appeal in the highly competitive mid-size SUV segment. Positioned as a step up from the base models, the 5.3L V8 offered a significant power increase and was targeted towards buyers needing towing capacity and robust performance. It sat below the more luxurious GMC Envoy Denali in the lineup.
Technical Specifications
| Brand | GMC |
| Model | Envoy |
| Generation | Envoy II XL (GMT370) |
| Type (Engine) | 5.3i V8 (290 Hp) 4×4 Automatic |
| Start of production | 2003 |
| End of production | 2004 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 7 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.3 kg/Hp, 121.2 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 184.3 Nm/tonne |
| Power | 290 Hp @ 5200 rpm |
| Power per litre | 54.4 Hp/l |
| Torque | 441 Nm @ 4000 rpm |
| Torque (lb-ft) | 325.26 lb.-ft. @ 4000 rpm |
| Maximum engine speed | 5900 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | LH6 |
| Engine displacement | 5328 cm3 |
| Engine displacement (cu. in.) | 325.13 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96 mm (3.78 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 9.5:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant capacity | 17 l (17.96 US qt | 14.96 UK qt) |
| Kerb Weight | 2393 kg (5275.66 lbs.) |
| Max. weight | 2903 kg (6400.02 lbs.) |
| Max load | 510 kg (1124.36 lbs.) |
| Trunk (boot) space – minimum | 631 l (22.28 cu. ft.) |
| Trunk (boot) space – maximum | 2839 l (100.26 cu. ft.) |
| Fuel tank capacity | 96.1 l (25.39 US gal | 21.14 UK gal) |
| Permitted trailer load with brakes (12%) | 3175 kg (6999.68 lbs.) |
| Length | 5271 mm (207.52 in.) |
| Width | 1897 mm (74.69 in.) |
| Height | 1917 mm (75.47 in.) |
| Wheelbase | 3275 mm (128.94 in.) |
| Front track | 1603 mm (63.11 in.) |
| Rear (Back) track | 1576 mm (62.05 in.) |
| Ride height (ground clearance) | 203 mm (7.99 in.) |
| Minimum turning circle (turning diameter) | 12.6 m (41.34 ft.) |
| Approach angle | 34.1° |
| Departure angle | 23.6° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, automatic transmission Hydra-Matic |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 245/65 R17 |
| Wheel rims size | 7.0J x 17 |
Powertrain & Engine Architecture
The heart of this Envoy variant is the 5.3-liter LH6 V8 engine. This engine, a member of General Motors’ Small-Block family, is a cast-iron block, aluminum-head design. It utilizes a traditional overhead valve (OHV) valvetrain with two valves per cylinder. Fuel delivery is managed by a multi-port fuel injection system, providing adequate atomization for efficient combustion. The LH6 is known for its durability and relatively simple design, contributing to its longevity. The engine is longitudinally mounted in the chassis, driving all four wheels through a four-speed Hydra-Matic 4L60-E automatic transmission. This transmission, a common choice for GM trucks and SUVs of the era, is electronically controlled and offers smooth shifts, though it lacks the efficiency of more modern transmissions. The 4L60-E’s gear ratios are tailored for a balance of acceleration and towing capability.
Driving Characteristics
The 5.3L V8 provides a noticeable performance boost compared to the base 4.2L inline-six engine offered in other Envoy trims. While not a sports car, the Envoy II XL with the V8 delivers adequate acceleration for everyday driving and highway merging. The automatic transmission, while smooth, can feel somewhat dated by modern standards, with noticeable shift points. The four-speed configuration limits the engine’s ability to stay in its optimal power band, especially at higher speeds. The four-wheel drive system enhances traction in inclement weather and provides some off-road capability, though the Envoy is primarily designed as an on-road vehicle. Towing is where this variant truly shines, offering a substantial increase in capacity compared to lower-powered models.
Equipment & Trim Levels
The Envoy II XL 5.3L 4×4 typically included features such as air conditioning, power windows and locks, a CD player, and cloth upholstery. Optional extras included leather seats, a sunroof, upgraded audio systems, and rear-seat entertainment systems. The interior design was functional and straightforward, prioritizing practicality over luxury. The XL trim level represented a mid-range offering, providing a good balance of features and affordability.
Chassis & Braking
The GMT370 platform utilizes a body-on-frame construction, providing a robust and durable chassis. The front suspension consists of an independent double wishbone setup, while the rear features an independent multi-link suspension. This configuration aims to provide a comfortable ride and reasonable handling. Braking duties are handled by ventilated discs at the front and solid discs at the rear. Anti-lock brakes (ABS) were standard, enhancing safety during emergency braking situations. The relatively heavy weight of the vehicle, combined with the high ground clearance, contributes to a noticeable body roll during cornering.
Market Reception & Comparison
The Envoy II XL 5.3L 4×4 was generally well-received by critics as a capable and practical SUV. It offered a compelling combination of power, space, and features at a competitive price point. Compared to the base Envoy models, the V8 variant provided a significant performance upgrade, making it a popular choice for buyers needing towing capacity. However, its fuel economy was considerably lower than that of the six-cylinder models. Compared to rivals like the Ford Explorer and Chevrolet TrailBlazer, the Envoy offered a similar level of performance and features, with GMC’s reputation for truck-like durability being a key selling point.
Legacy
The LH6 5.3L V8 engine, in general, has proven to be a reliable and durable powerplant. While the 4L60-E transmission can be prone to issues if not properly maintained, the engine itself is known for its longevity. Today, used Envoy II XL 5.3L 4×4 models are relatively affordable and can be found in reasonable condition. They represent a good value for buyers seeking a capable and spacious SUV with V8 power, but potential buyers should be aware of the potential maintenance costs associated with an older vehicle. The GMT370 platform, while not known for groundbreaking innovation, provided a solid foundation for the Envoy and remains a common sight on roads today.
