ChevroletBlazer 4WD1991Overview/chevrolet/blazer-4wd/1991/base/

1991 Chevrolet Blazer 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1991 Blazer 4WD.

The 1991 Chevrolet Blazer 4WD takes 4 qt of 5W-30 engine oil.

Model year19911985

Quick specs

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

Engine oil capacity4 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque80 ft-lbsOEM · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 25160561. Note the factory fuel filter and serpentine belt are now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. 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.

OE service part numbers OEM · verified

Engine oil filter25160561
Engine air filter08996118 alt 06484235
Fuel filter25171792 discontinued · alt 25011765
Spark plug19302741
Front wiper blades15184702 alt 12363297
Serpentine belt09433775 discontinued · alt 09433749
Thermostat14077122 alt 12551591

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length184.6 in
Overall width79.5 in
Overall height74 in
Wheelbase106.7 in
Curb weight4515 lb

Service quick specs OEM factory data

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

This engine holds 4 qt of 5W-30 API engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 80 ft-lbs.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity10.0 qt
Engine Oil5W-30 · API
Engine Oil Capacity4 qt
Engine Oil5W-30 · API
Engine Oil Capacity5.5 qt
Engine Oil15W-40 · 10W-30

Chassis torques

Lug Nuts80 ft-lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter at 7,500 mi.

At 5,000 miUniversal Vehicle Operation (inspect idle speed)
Every 5,000 miBrake Hydraulic System (inspect fluid level) · Brake System (inspect) · Power Steering System (inspect)
At 7,500 miDrive Axle Assembly (drain & refill) · Engine Oil Filter (replace) · Throttle Body (torque) · Tire & Wheel Assembly (rotate)
Every 7,500 miAccessory Drive Belt (inspect) · Body Latches, Locks & Hinges (inspect) · Brake Line (inspect) · Brake Linings (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level)
Every 10,000 miAir Intake System (inspect) · Radiator Fan Assembly (inspect)
Every 15,000 miEngine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 30,000 miClutch Cross Shaft (lubricate) · Clutch Release Lever Pivot Points (lubricate) · EGR System (inspect) · Early Fuel Evaporation System (inspect) · Engine Air Filter Element (replace) · Engine Breather Filter (replace)
Every 60,000 miCrankcase Depression Regulator Valve (inspect) · Exhaust Pressure Regulator (inspect) · Fuel Filter (replace) · Fuel Line (inspect) · Fuel Tank (inspect) · Fuel Tank Filler Cap (inspect)

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

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VIN
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Vehicles with shared specs

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

Reference guides

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

Frequently asked

How much oil does the 1991 Blazer 4WD take?

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