GMC TruckK15001986Overview/gmc-truck/k1500/1986/base/

1986 GMC Truck K1500

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1986 K1500.

The 1986 GMC Truck K1500 specifies a 6-quart engine oil capacity with approved viscosities of 20W-20, 15W-40, and 5W-30, detailing its lubrication requirements for the period. The model's documented complaint history covers the 1990 through 1996 model years, showing a peak of 29 complaints in 1995 and a low of 3 in 1991, which places the 1986 edition just before this tracking window and frames its reliability context within a subsequent era of generally modest but fluctuating owner reports. As a result, the 1986 K1500 sits outside the formal complaint dataset, meaning its long-term durability profile must be inferred from the later trend rather than direct data.

Quick specs

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

Engine oil capacity6 qtOEM · verified
Engine oil type20W-20 / 15W-40 / 5W-30OEM · verified

Service quick specs OEM factory data

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

This engine holds 6 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 Capacity4.2 qt
Differential Gear Oil80W-90 · GL-5
Differential Gear Oil Capacity27.0 qt
Engine CoolantETHYLENE GLYCOL
Engine Oil20W-20 · 15W-40 · 5W-30
Engine Oil Capacity6 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; coolant every 30,000 mi. The big-interval services (every 30,000 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) · Exhaust Pressure Regulator (inspect)
Every 5,000 miAccessory Drive Belt (inspect) · Brake System (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Shift Linkage (lubricate)
At 7,500 miCarburetor Mounting Fasteners (inspect) · Choke System (inspect) · Distributor Vacuum Advance (inspect) · Early Fuel Evaporation System (inspect) · Engine Oil (drain & refill) · 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 (drain & refill) · Engine Oil Filter (replace) · Exhaust Pressure Regulator (inspect) · PCV System (inspect) · Tire & Wheel Assembly (rotate)
At 30,000 miDistributor Vacuum Advance (inspect)
Every 30,000 miChoke System (inspect) · Clutch Cross Shaft (lubricate) · EGR System (inspect) · Engine Air Filter Element (replace) · Engine Breather Filter (replace) · Engine Coolant System (drain, flush & refill)
Every 60,000 miCarburetor Mounting Fasteners (inspect) · Spark Plug Wires (inspect) · Universal Vehicle Operation (inspect idle speed)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

1
Open recalls
NHTSA campaigns
0
Service bulletins
Manufacturer communications
1
ODI investigations
Office of Defects Investigation
0
Owner complaints
0 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

No owner complaints on record with NHTSA for this vehicle.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

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.

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 K1500. 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 1986 K1500 take?

6 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 1986 K1500 have open recalls?

NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.