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370 platform

2008 Isuzu I

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2008 I.

Body TRUCKTransmission Automatic 4-spd

The 2008 Isuzu I is a body-on-frame truck riding on the 370 platform, powered by a standard engine and paired with a four-speed automatic transmission that returns EPA fuel economy of 18 city, 24 highway, and 20 combined mpg. Its reliability record shows only four total owner complaints, with the top issue centered on the service brakes, and the model year carries two recalls. This low complaint count suggests a generally trouble-free ownership experience for its era, though the brake-related concerns and recall history warrant attention for prospective researchers.

Model year200820072006

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Lug nut torque100 ft-lbsOEM · verified
EPA fuel economy18/24/20 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 86 · 640 CCA battery, OE oil filter 8890173420. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 86 · 640 CCAOEM · verified
Tire sizeP225-75R15OEM · verified
Wheel / rim7-J inOEM · verified

OE service part numbers OEM · verified

Engine oil filter8890173420
Engine air filter8152024080
Spark plug8126816630
Front wiper blades8889582220 alt 8889582240
Serpentine belt8126116360
Thermostat8125611550 alt 8126223160

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic 4-spd

Ratings & economy EPA / vPIC

EPA city / highway / combined18 / 24 / 20 mpg
DrivetrainRear-Wheel Drive
Recommended fuelRegular Gasoline

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine SYNTHETIC · 75W-90 in the differential. Torque lug nuts to 100 ft-lbs, the oil drain plug to 19.0 ft-lbs. The firing order is 1-3-5-4-2.

Lubricants & capacities

Automatic Transmission FluidATF
Automatic Transmission Fluid Capacity5
Differential Gear OilSYNTHETIC · 75W-90
Differential Gear Oil Capacity3.2 Pints, mvc;Front
Differential Gear OilSYNTHETIC · 75W-90
Differential Gear Oil Capacity3.5 Pints,
Power Steering FluidGM PART NO. 89021184 OR EQUIVALENT
Transfer Case FluidGM PART NO. 12345349 OR EQUIVALENT

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs9 ft-lbs
Cylinder Head StepsInstall new cylinder head bolts.
Engine Oil Pan Drain Plug19.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs7 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)56.0 ft-lbs
Leaf Spring to Rear Shackle63.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket63.0 ft-lbs
Lug Nuts100 ft-lbs
Transfer Case Fill Plug29.0 ft-lbs
Transfer Case Drain Plug29.0 ft-lbs
Front Wheel Hub191 ft-lbs

Ignition

Cylinder Firing Order1-3-5-4-2
Cylinder Firing Order1-3-5-4-2

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.45 lbs
Oil GroupPAG
Oil Type46
Oil Capacity4.00 oz
Standard BCI Group Number86
Standard BCI Cranking Performance640 cca

Service checks

Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature188-206 °F
Engine Compression215
Engine Compression215 Nominal psi

Brakes

Torque Caliper to Bracket29 ft-lbs
Torque to Knuckle129 ft-lbs
Minimum Pad Thickness0.070 in
Minimum Shoe Thickness0.030 in
Rotor Max Parallel Variation0.002 in
Rotor Runout Limit0.002 in
Rotor Nominal Thickness From1.062 in
Rotor Nominal Thickness To1.062 in

Multi-step torque procedures OEM · verified

Leaf Spring to Chassis Bracket — tightening sequence 1 stages
180
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
118 ft. lbs., Step 2: 11018 ft. lbs
Engine Flywheel Bolts — tightening sequence 1 stages
130 ft. lbs., Step 2: 4530 ft. lbs
Main Bearings — tightening sequence 1 stages
118 ft. lbs., Step 2: 18018 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 25,000 miExhaust System (Complete) (inspect) · Fuel System (inspect)
Every 100,000 miSpark Plugs (replace) · Transmission Fluid & Filter (replace)
At 150,000 miAccessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

Owner complaints about the 2008 Isuzu I lead in one area — the service brakes, 1 of 4 reports (25%), well ahead of the next concern. None of this vehicle's 1 recall campaigns target the service brakes, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the service brakes pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

2
Open recalls
NHTSA campaigns
10
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
4
Owner complaints
0 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
Rollover★★★★★

Owner complaints filed with NHTSA, by component

All 4 complaints on record, top 4 components.

Service Brakes1
Steering,Electrical System,Engine1
Power Train1
Electrical System,Equipment1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

09V310000Exterior Lighting:Brake Lights:SwitchReported 29/07/2009

GM IS RECALLING 185,903 MODEL YEAR 2004-2009 COLORADO, GMC MODEL YEAR 2009-2004 CANYON, MODEL YEAR 2006 I-280, I-350, MODEL YEAR 2007-2008 I-290, AND I-370, PASSENGER VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED… Remedy: DEALERS WILL INSPECT AND REPLACE THE NECESSARY COMPONENTS AS SPECIFIED IN THE RECALL BULLETIN FREE OF CHARGE. GM ANTICIPATES THAT PARTS WILL BE AVAILABLE BY JUNE 2010. A SPECIAL…

Technical service bulletins NHTSA · verified

Showing 5 of 10 bulletins on record with NHTSA.

BulletinDateComponentSummary
IB13-R-001G2023-05-08Unknown Or OtherThis bulletin outlines the procedures for using the Alpine Exchange Program (the…
WB13-X-001B2022-08-30EquipmentIsuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural…
WB13-X-001A2022-08-02EquipmentIsuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural…
IB09-X-002B2022-07-20EquipmentThe following is a list of the Isuzu-recommended Threebond product part numbers…
IB09-X-004C2022-07-20Engine And Engine CoolingThe Isuzu Commercial Truck of America (ICTA) Service Technical Assistance Center (TAC)…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific I. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group 86 battery370-platform vehiclesEngine oil filter 8890173420Engine air filter 8152024080Spark plug 8126816630Front wiper blades 8889582220

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBsOBD-II trouble codesTorque specificationsMaintenance schedulesFluid capacities & specs

Frequently asked

Does the 2008 I have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the I get?

EPA figures are 18 city / 24 highway / 20 combined mpg.