ChevroletC-Series Pickup1991Overview/chevrolet/c-series-pickup/1991/base/

1991 Chevrolet C-Series Pickup

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1991 C-Series Pickup.

The 1991 Chevrolet C-Series Pickup, a full-size light-duty truck from Chevrolet's C-Series lineup, carries a 4-quart engine oil capacity and runs on 5W-30 API viscosity grade. This model year's reliability record is remarkably thin—just a single owner complaint, centered on the Service Brakes, Hydraulic system, and zero recalls on file. For a researcher, that places the 1991 model at a notably stable point in the C-Series' history, with the lone brake-related report standing as the only data point worth flagging.

Model year199619951994199319921991198919881986

Quick specs

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

Engine oil capacity4 qtOEM · verified
Engine oil type5W-30 APIOEM · 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 Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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 alt 12737090
Engine air filter08996118 alt 06484235
Fuel filter25171792 discontinued · alt 25011765
Spark plug19302741
Front wiper blades15184702 alt 12363297
Serpentine belt19370622 alt 22518599
Thermostat10105135 alt 12551591

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.

Lubricants & capacities

Brake FluidDOT 3
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity14.0 qt
Engine Oil5W-30 · API
Engine Oil Capacity4 qt
Engine Oil5W-30 · API
Engine Oil Capacity5.5 qt
Engine Oil5W-30 · API

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; coolant every 24,000 mi. The big-interval services (every 24,000 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 3,000 miKing Pin (lubricate)
At 5,000 miDrive Axle Assembly (drain & refill) · Universal Vehicle Operation (inspect idle speed)
Every 5,000 miBrake Hydraulic System (inspect fluid level) · Brake System (inspect) · CV Joint Boot (inspect) · Engine Oil Filter (replace) · Power Steering System (inspect) · Steering Linkage (lubricate)
At 6,000 miDrive Axle Assembly (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (rotate)
Every 6,000 miBody Latches, Locks & Hinges (inspect) · Brake Line (inspect) · Brake Linings (inspect) · Differential (inspect fluid level) · Engine Oil (drain & refill) · Parking Brake Cable (lubricate)
Every 7,500 miExhaust System (Complete) (inspect)
Every 12,000 miAir Cleaner Manifold Heat Control Actuator (inspect) · Engine Oil Filter (replace) · Radiator Fan Assembly (inspect) · Tire & Wheel Assembly (rotate) · Underbody Splash Shield (inspect)
Every 15,000 miEGR System (inspect) · Engine Air Filter Element (replace)
Every 24,000 miAir Intake System (inspect) · Drive Axle Assembly (drain & refill) · Engine Breather Filter (replace) · Engine Coolant System (drain, flush & refill) · Fuel Evaporative Emission Control System (inspect) · Fuel Filter (replace)

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 1991 Chevrolet C-Series Pickup dominate in one area — the service brakes, hydraulic, 1 of 1 reports (100%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 1 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the service brakes, hydraulic 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.

0
Open recalls
NHTSA campaigns
14
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
1
Owner complaints
1 involved a crash · 0 a fire

Owner complaints filed with NHTSA, by component

All 1 complaints on record, top 1 components.

Service Brakes, Hydraulic1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 14 bulletins on record with NHTSA.

BulletinDateComponentSummary
WB11-X-001A2023-10-18Engine And Engine CoolingThe following information is provided to clearly explain Isuzu’s policy for control…
0302320442004-09-01SteeringEFFECT OF STEERING BOX LIMITER ADJUSTMENT ON TURNING RADIUS AND POSSIBILITY OF POWER…
0206040522002-10-01Engine And Engine CoolingENGINE STALL, NO START, HARD START CONDITION. *TT
0201370022002-03-01VisibilitySUBJECT REGARDING SERVICE DIAGNOSIS/RECOMMENDATIONS FOR INOPERATIVE AIR CONDITIONING…
0104200052001-11-01Power TrainINFORMATION REGARDING CORRECT VEHICLE APPLICATION FOR EATON. 1990-2002 CHEVROLET AND GMC…

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 C-Series Pickup. 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.

Reference guides

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

Frequently asked

How much oil does the 1991 C-Series Pickup take?

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

Does the 1991 C-Series Pickup have open recalls?

NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.