Isuzu Ascender (2003–2008 U.S.)
5-passenger and 7-passenger (extended wheelbase) mid-size SUV.
Tech specs
| Item | Specification |
|---|---|
| Engines | 4.2 L I6 (LL8); 5.3 L V8 |
| Transmission | 4-speed automatic |
| Drive | Rear-wheel drive or 4WD |
| Rear suspension | Solid live axle |
Dimensions
| Item | Figure |
|---|---|
| Overall length, 5-passenger | 191.6 in (4,867 mm) |
| Width | 76.1 in (1,933 mm) |
| Wheelbase, 5-passenger | 113.0 in (2,870 mm) |
| Ground clearance (2006) | 8.0 in (203 mm) |
| Approach / departure angle (2006) | 34° / 29° |
| Turning circle (2006) | 36.4 ft (11.1 m) |
Dimensions drawing

Fluid capacities
Capacities are approximate refill amounts from Isuzu factory service manual data for the year shown. Always fill to the level/check plug or dipstick, not just by volume.
| System | Capacity | Notes |
|---|---|---|
| Engine oil, 4.2 L (with filter) | 7.0 qt (6.6 L) | |
| Cooling system | 5-pass: 10.8 qt (10.2 L); 7-pass: 13.8 qt (13.1 L) | |
| Automatic transmission | Pan removal 5.0 qt (4.7 L); overhaul 11.0 qt (10.6 L) | |
| Transfer case | 2.0 qt (1.8 L) | |
| Front differential (4WD) | 1.7 pt (0.8 L) | |
| Rear differential | 3.6 pt (1.7 L) | |
| A/C refrigerant (R-134a) | 1.9 lb (0.85 kg); 2.65 lb with rear A/C |
Torque specs
| Fastener | Torque |
|---|---|
| Oil pan drain plug (2006) | 19 lb-ft (26 N·m) |
| Oil pan bolts, sides | 18 lb-ft (25 N·m) |
| Oil pan bolts, ends | 89 lb-in (10 N·m) |
| Oil pan nut | 18 lb-ft (25 N·m) |
Trims & body styles (U.S.)
| Years | Version | Notes |
|---|---|---|
| 2003–2008 | Ascender 5-passenger and 7-passenger (extended wheelbase), 2WD / 4WD | 4.2 L I6 or 5.3 L V8 |
Fuel economy (EPA)
U.S. EPA estimates in miles per gallon as currently published on fueleconomy.gov (older models are shown on the revised 2008 EPA method, so they read lower than the original window sticker). To convert: L/100 km = 235.2 ÷ mpg.
| Model year | EPA listing | Engine | Transmission | Drive | City | Hwy | Comb |
|---|---|---|---|---|---|---|---|
| 2003 | Ascender | 4.2 L | Auto 4-spd | 2WD | 14 | 19 | 16 |
| 2003 | Ascender | 4.2 L | Auto 4-spd | 4WD | 13 | 19 | 15 |
| 2003 | Ascender | 5.3 L | Auto 4-spd | 2WD | 14 | 18 | 15 |
| 2003 | Ascender | 5.3 L | Auto 4-spd | 4WD | 13 | 16 | 14 |
| 2004 | Ascender | 4.2 L | Auto 4-spd | 2WD | 13 | 18 | 15 |
| 2004 | Ascender | 4.2 L | Auto 4-spd | 4WD | 14 | 19 | 16 |
| 2004 | Ascender | 5.3 L | Auto 4-spd | 2WD | 14 | 18 | 16 |
| 2004 | Ascender | 5.3 L | Auto 4-spd | 4WD | 13 | 17 | 14 |
| 2004 | Ascender 5-passenger | 4.2 L | Auto 4-spd | 2WD | 14 | 19 | 16 |
| 2004–2005 | Ascender 5-passenger | 4.2 L | Auto 4-spd | 4WD | 14 | 19 | 16 |
| 2005 | Ascender 7-passenger | 4.2 L | Auto 4-spd | 2WD | 13 | 18 | 15 |
| 2005 | Ascender 7-passenger | 5.3 L | Auto 4-spd | 2WD | 13 | 19 | 15 |
| 2005–2006 | Ascender 7-passenger | 4.2 L | Auto 4-spd | 4WD | 14 | 19 | 16 |
| 2005–2006 | Ascender 7-passenger | 5.3 L | Auto 4-spd | 4WD | 13 | 18 | 15 |
| 2005–2008 | Ascender 5-passenger | 4.2 L | Auto 4-spd | 2WD | 14 | 20 | 16 |
| 2006 | Ascender 7-passenger | 4.2 L | Auto 4-spd | 2WD | 14 | 19 | 15 |
| 2006 | Ascender 7-passenger | 5.3 L | Auto 4-spd | 2WD | 14 | 19 | 16 |
| 2006–2009 | Ascender 5-passenger | 4.2 L | Auto 4-spd | 4WD | 14 | 20 | 16 |
| 2007 | Ascender 7-passenger | 5.3 L | Auto 4-spd | 4WD | 14 | 19 | 16 |
Factory colors & paint codes
Swatch colors are approximate screen representations. Always match paint by the color code on your vehicle’s paint label (usually on the driver door jamb or under the hood), not by the swatch. Availability varied by body style, trim and year (U.S. market). Two-tone swatches show the upper color over the lower color.
Factory brochures
Original U.S.-market Isuzu sales brochure pages, shown for reference. Tap any page to enlarge. Specs and colors in brochures were subject to change during the model year.
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