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1998 Chevrolet Blazer 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1998 Blazer 4WD.

Transmission Automatic 3-spd

The 1998 Chevrolet Blazer 4WD takes 4.5 qt of 5W-30 engine oil and is EPA-rated at 20/23/21 mpg city/highway/combined.

Model year2001 1998 1992 1988

Quick specs

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

Engine oil capacity4.5 qtOEM · verified

Engine oil type5W-30 APIOEM · verified

Lug nut torque95 ft-lbsOEM · verified

EPA fuel economy20/23/21 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 75 · 525 CCA battery, OE oil filter 19210286. 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 75 · 525 CCAOEM · verified

Tire size31X10.5R15LTOEM · verified

Wheel / rim7-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	19210286
Engine air filter	25170512 alt 19259086
Fuel filter	25168594
Spark plug	12681665
Front wiper blades	15757007 alt 15757008
Serpentine belt	12550110 alt 12550111
Thermostat	12632948 alt 12551507

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic 3-spd

Dimensions & weight NHTSA vPIC

Overall length	178.3 in
Overall width	67.7 in
Overall height	65.7 in
Wheelbase	100.4 in
Curb weight	3629 lb
Track (front / rear)	54.7 / 54.7 in

Ratings & economy EPA / vPIC

EPA city / highway / combined	20 / 23 / 21 mpg
Drivetrain	4-Wheel or All-Wheel Drive
Recommended fuel	Regular Gasoline

Service quick specs OEM factory data

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

This engine holds 4.5 qt of 5W-30 API engine oil. Torque lug nuts to 95 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-6-5-4-3-2.

Lubricants & capacities

Engine Oil	5W-30 · API
Engine Oil Capacity	4.5 qt
Engine Oil	5W-30 · API
Engine Oil Capacity	4.5 qt

Engine torques

Crankshaft Pulley and/or Damper Bolts	74 ft-lbs
Engine Oil Pan Drain Plug	18.0 ft-lbs
Engine Valve Cover Bolts	8.85 ft-lbs

Chassis torques

Leaf Spring to Axle (U-bolts)	74.0 ft-lbs
Leaf Spring to Chassis Bracket	89.0 ft-lbs
Leaf Spring to Rear Shackle	89.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket	89.0 ft-lbs
Lug Nuts	95 ft-lbs
Transfer Case Fill Plug	18.0-30.0 ft-lbs
Transfer Case Drain Plug	18.0-30.0 ft-lbs
Front Wheel Hub	103 ft-lbs

Ignition

Cylinder Firing Order	1-6-5-4-3-2
Spark Plug Manufacturer	AC Delco
Spark Plug Gap	0.045 in
Spark Plug Torque	15 ft-lbs

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	1.75-2.00 lbs
Oil Group	PAG
Oil Type	46
Oil Capacity	8.00 oz
Standard BCI Group Number	75
Standard BCI Cranking Performance	525 cca
Optional BCI Group Number	75

Service checks

Pressure Test	20 psi
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	188-206 °F
Fuel Pump Pressure Minimum	66.0 psi
Key ON Engine OFF (KOEO)	60-66
RPM	50-63 @ Idle rpm
Engine Compression	100
Engine Compression	100 Minimum psi

Brakes

Brake Application	WITH FOUR WHEEL DISC / WITH STANDARD
Torque to Knuckle	77 ft-lbs / 52 ft-lbs / 38 ft-lbs
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 specification
Brake Application	WITH FOUR WHEEL DISC / WITH STANDARD
Rotor Max Parallel Variation	0.0003 in / 0.0005 in
Rotor Runout Limit	0.003 in / 0.004 in
Rotor Nominal Thickness From	1.14 in / 0.787 in / 1.03 in
Rotor Nominal Thickness To	1.14 in / 0.787 in / 1.03 in

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.

Every 7,500 mi	Axle Shaft Oil Seal (inspect) · Body Latches, Locks & Hinges (inspect) · Brake Pedal Assembly (lubricate return spring) · CV Joint Boot (inspect) · Clutch Pedal Bushing (lubricate) · Clutch Pedal Clevis Pin (lubricate)
Every 30,000 mi	Engine Air Filter Element (replace) · Fuel Filter (replace) · Wheel Bearing (inspect)
Every 50,000 mi	Transmission Fluid & Filter (replace)
Every 60,000 mi	Accessory Drive Belt (inspect) · Fuel Line (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (inspect)
Every 100,000 mi	PCV Valve (inspect) · Spark Plug Wires (inspect) · Spark Plugs (replace)

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 Blazer 4WD. 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 75 battery Vehicles taking 4.5 qt Engine oil filter 19210286 Engine air filter 25170512 Fuel filter 25168594 Spark plug 12681665

Reference guides

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

OBD-II trouble codes Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 1998 Blazer 4WD take?

4.5 qt of 5W-30 API, per the factory manual.

What gas mileage does the Blazer 4WD get?

EPA figures are 20 city / 23 highway / 21 combined mpg.