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1985 Chevrolet Blazer 4WD

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1985 Blazer 4WD.

The 1985 Chevrolet Blazer 4WD is identified by specific maintenance parameters, including an engine oil capacity of 3 qt and recommended viscosities of 20W-20, 15W-40, or 5W-30. Reliability records for this model year indicate 32 total owner complaints and 2 recalls, with steering emerging as the top complaint area. When viewed against the available model complaint history covering 1990-1992, where annual complaints ranged from 43 to 302, the 1985 variant occupies a distinct position with a lower volume of reported issues within the documented reliability timeline.

Model year1991 1985

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 Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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 filter	25160561
Engine air filter	08996118 alt 08997890
Fuel filter	5651803 discontinued · alt 25011765
Spark plug	19300382
Front wiper blades	15184702
Serpentine belt	09433740 alt 09433722
Thermostat	03043321 alt 14077122

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length	184.6 in
Overall width	79.5 in
Overall height	74 in
Wheelbase	106.7 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 Fluid	DOT 3
Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	4.0 qt
Differential Gear Oil	80W-90 · GL-5
Differential Gear Oil Capacity	4.6 qt
Engine Coolant	ETHYLENE GLYCOL
Engine Oil	20W-20 · 15W-40 · 5W-30
Engine Oil Capacity	3 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.

At 5,000 mi	Exhaust Pressure Regulator (inspect)
Every 5,000 mi	Brake System (inspect) · Engine Oil Filter (replace) · Throttle Linkage (inspect)
At 7,500 mi	Choke System (inspect) · Distributor Vacuum Advance (inspect) · Drive Axle Assembly (drain & refill) · Early Fuel Evaporation System (inspect) · Engine Oil Filter (replace) · Throttle Body (torque)
Every 7,500 mi	Body 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 mi	Air Intake System (inspect) · Radiator Fan Assembly (inspect) · Underbody Splash Shield (inspect)
Every 15,000 mi	Engine Oil Filter (replace) · Exhaust Pressure Regulator (inspect) · PCV System (inspect) · PCV Valve (inspect) · Tire & Wheel Assembly (rotate)
At 30,000 mi	Early Fuel Evaporation System (inspect)
Every 30,000 mi	Accessory Drive Belt (inspect) · Choke System (inspect) · Clutch Cross Shaft (lubricate) · Distributor Assembly (inspect) · Distributor Vacuum Advance (inspect) · EGR System (inspect)
At 45,000 mi	Distributor Vacuum Advance (inspect)

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 1985 Chevrolet Blazer 4WD lead in one area — the steering, 6 of 32 reports (19%), well ahead of the next concern. None of this vehicle's 2 recall campaigns target the steering, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 6 of the reports describe a crash and 4 a fire — a small share of the total, but worth weighing against the steering 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.

Open recalls

NHTSA campaigns

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

6 involved a crash · 4 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Overall★★★★★

Frontal★★★★★

Side★★★★★

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92

Owner complaints filed with NHTSA, by component

All 32 complaints on record, top 8 components.

Steering6

Engine & Engine Cooling5

Power Train4

Service Brakes, Hydraulic4

Seat Belts3

Structure2

Tires2

Seats2

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

06E026000Exterior LightingReported 23/03/2006

CERTAIN PRO-A MOTORS CORNER LAMPS, TURN SIGNALS, AND HEADLIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN PASSENGER VEHICLES LISTED ABOVE. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL… Remedy: PRO-A MOTORS WILL NOTIFY OWNERS AND OFFER TO REPURCHASE THE LAMPS. THE RECALL BEGAN ON APRIL 3, 2006. OWNERS MAY CONTACT PRO-A MOTORS AT 323-838-2988.

07E088000EquipmentReported 24/10/2007

CERTAIN HONEYWELL FRAM RACING BRAND HP4 AND HP8 OIL FILTERS THAT WERE MANUFACTURED FROM MAY 25, 2006, THROUGH SEPTEMBER 14, 2007, AND SOLD FOR USE AS REPLACEMENT EQUIPMENT FOR VEHICLES LIST ABOVE. THE AFFECTED FILTERS… Remedy: HONEYWELL WILL REPLACE THE AFFECTED OIL FILTERS FREE OF CHARGE. THE RECALL BEGAN DURING NOVEMBER 2007. OWNERS CAN CONTACT FRAM CUSTOMER SERVICE TOLL-FREE AT 1-800-890-2075.

Technical service bulletins NHTSA · verified

Showing 3 of 3 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
GM561204	1995-04-01	Structure	WATER LEAK AT THE A/C RECIRCULATION DOOR (INSTALL NEW HOOD HINGE SEAL). *TW
GM161514	1995-04-01	Latches/Locks/Linkages	END GATE LATCH RATTLE (INSTALL REVISED STRIKER). *TW
9310A343	1993-02-01	Visibility	FRONT DOOR SIDE GLASS BINDING/TRACK DISENGAGEMENT. *TW

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.

Vehicles taking 3 qt Engine oil filter 25160561 Engine air filter 08996118 Fuel filter 5651803 Spark plug 19300382

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Maintenance schedules Fluid capacities & specs

Frequently asked

How much oil does the 1985 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.

Does the 1985 Blazer 4WD have open recalls?

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