ChevroletBlazer 4WD1986Overview/chevrolet/blazer-4wd/1986/base/

1986 Chevrolet Blazer 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1986 Blazer 4WD.

The 1986 Chevrolet Blazer 4WD takes 3 qt of 20W-20 engine oil.

Model year200419951986

Quick specs

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

Engine oil capacity3 qtOEM · verified
Engine oil type20W-20 / 15W-40 / 5W-30OEM · 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 Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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 08997890
Fuel filter5651803 discontinued · alt 25011765
Spark plug05614046 alt 19300874
Front wiper blades15184702
Serpentine belt10112415 alt 09433764
Thermostat03043321 alt 14077122

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

Service quick specs OEM factory data

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

This engine holds 3 qt of 20W-20 / 15W-40 / 5W-30 engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity4.0 qt
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity4.6 qt
Engine CoolantETHYLENE GLYCOL
Engine Oil20W-20 · 15W-40 · 5W-30
Engine Oil Capacity3 qt

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 5,000 mi; spark plugs every 60,000 mi.

At 5,000 miExhaust Pressure Regulator (inspect) · Universal Vehicle Operation (inspect idle speed)
Every 5,000 miBrake System (inspect) · Engine Oil Filter (replace)
At 7,500 miCarburetor Mounting Fasteners (inspect) · Choke System (inspect) · Distributor Vacuum Advance (inspect) · Drive Axle Assembly (drain & refill) · Early Fuel Evaporation System (inspect) · Engine Oil Filter (replace)
Every 7,500 miBody Latches, Locks & Hinges (inspect) · Brake Line (inspect) · Brake Linings (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Driveshaft U-Joint (lubricate)
Every 10,000 miAir Intake System (inspect) · Radiator Fan Assembly (inspect) · Underbody Splash Shield (inspect)
Every 15,000 miDistributor Vacuum Advance (inspect) · Engine Oil Filter (replace) · Exhaust Pressure Regulator (inspect) · Tire & Wheel Assembly (rotate)
Every 30,000 miAccessory Drive Belt (inspect) · Choke System (inspect) · Clutch Cross Shaft (lubricate) · Clutch Release Lever Pivot Points (lubricate) · EGR System (inspect) · Early Fuel Evaporation System (inspect)
Every 60,000 miCarburetor Mounting Fasteners (inspect) · Fuel Filter (replace) · Spark Plug Wires (inspect) · Throttle Body (torque)

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
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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 1986 Blazer 4WD take?

3 qt of ABOVE 40 degrees F: 30, ABOVE 20 degrees F: 20W-20, ABOVE 10 degrees F: 15W-40, BELOW 60 degrees F: 5W-30, per the factory manual.