GMC TruckV-Series Truck1991Overview/gmc-truck/v-series-truck/1991/base/

1991 GMC Truck V-Series Truck

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

The 1991 GMC Truck V-Series Truck takes 5 qt of 5W-30 engine oil.

Quick specs

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

Engine oil capacity5 qtOEM · verified
Engine oil type5W-30 / 10W-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 Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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
Engine air filter06484235 alt 08997890
Fuel filter25171792 discontinued · alt 25011765
Front wiper blades15184702 alt 12363297
Serpentine belt10223912 alt 10223910
Thermostat14077122 alt 10105135

Service quick specs OEM factory data

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

This engine holds 5 qt of 5W-30 / 10W-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
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity4.9 qt
Engine CoolantETHYLENE GLYCOL
Engine Oil5W-30 · API · 10W-30
Engine Oil Capacity5 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; 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.

At 5,000 miDrive Axle Assembly (drain & refill) · Tire & Wheel Assembly (rotate) · Universal Vehicle Operation (inspect idle speed)
Every 5,000 miBrake Hydraulic System (inspect fluid level) · Brake System (inspect) · Engine Oil Filter (replace) · Power Steering System (inspect) · Shift Linkage (lubricate) · Steering Linkage (lubricate)
At 6,000 miDrive Axle Assembly (drain & refill) · Engine Oil Filter (replace)
Every 6,000 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) · Underbody Splash Shield (inspect)
Every 12,000 miAir Cleaner Manifold Heat Control Actuator (inspect) · Engine Oil Filter (replace)
Every 15,000 miTire & Wheel Assembly (rotate)
Every 24,000 miDrive Axle Assembly (drain & refill) · Engine Air Filter Element (replace) · Engine Breather Filter (replace) · Engine Coolant System (drain, flush & refill) · Fuel Evaporative Emission Control System (inspect) · Fuel Filter (replace)
Every 30,000 miClutch Cross Shaft (lubricate) · Clutch Release Lever Pivot Points (lubricate) · PCV System (inspect) · Transmission Fluid & Filter (replace) · Universal Vehicle Operation (inspect idle speed)

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 V-Series Truck. 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 V-Series Truck take?

5 qt of LIGHT DUDY MODELS: 5W-30 API, HEAVY DUTY MODELS: 10W-30 API, per the factory manual.