GMC TruckG-Series Van1995Overview/gmc-truck/g-series-van/1995/base/

1995 GMC Truck G-Series Van

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 1995 G-Series Van.

The 1995 GMC Truck G-Series Van takes 4.5 qt of 5W-30 engine oil.

Model year19951985

Quick specs

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

Engine oil capacity4.5 qtOEM · verified
Engine oil type5W-30 / 10W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 78 · 600 CCA battery, 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 Note the factory fuel filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known.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.

Battery groupBCI 78 · 600 CCAOEM · verified
Tire sizeP205-75R15OEM · verified
Wheel / rim6-JJ inOEM · verified

OE service part numbers OEM · verified

Engine oil filter25160561 alt 12737090
Engine air filter06419892
Fuel filter25171792 discontinued
Spark plug19302741
Front wiper blades15184702
Serpentine belt88986825 alt 12576753
Thermostat10190925 alt 12551507

Service quick specs OEM factory data

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

This engine holds 4.5 qt of 5W-30 / 10W-30 API engine oil, 80W-90 · GL-5 in the differential, DOT 3 brake fluid. Torque lug nuts to 100 ft-lbs. The firing order is 1-8-4-3-6-5-7-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

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 Capacity4.5 qt

Engine torques

Cylinder Head Steps3
Cylinder Head Steps3
Cylinder Head StepsApply sealant GM P/N 12346004
Cylinder Head StepsApply the thread sealant GM P/N 12346004
Intake Manifold to Engine Bolts35 ft-lbs
Exhaust Manifold to Cylinder Head Bolts40 ft-lbs
Intake Manifold to Engine Bolts11.0 ft-lbs
Intake Manifold to Engine Bolts11.0 ft-lbs

Chassis torques

Leaf Spring to Chassis Bracket136.0 ft-lbs
Leaf Spring to Rear Shackle92.0 ft-lbs
Leaf Spring Rear Shackle to Chassis Bracket75.0 ft-lbs
Lug Nuts100 ft-lbs

Ignition

Cylinder Firing Order1-6-5-4-3-2
Cylinder Firing Order1-8-4-3-6-5-7-2
Cylinder Firing Order1-6-5-4-3-2
Cylinder Firing Order1-8-4-3-6-5-7-2
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.060 in
Spark Plug Torque11.0 ft-lbs
Spark Plug ManufacturerAC Delco

Battery & A/C

RefrigerantR134a
Refrigerant Capacity3.00-4.25 lbs
Oil GroupPAG
Oil Type46
Oil Capacity8.00-11.00 oz
Standard BCI Group Number78
Standard BCI Cranking Performance600 cca
Standard BCI Group Number78

Service checks

Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature192 °F
Pressure Test15 psi
Radiator Cap Pressure Relief15 psi
Thermostat Opening Temperature195 °F
Pressure Test15 psi
Radiator Cap Pressure Relief15 psi

Brakes

Minimum Pad ThicknessFront: 0.030; Rear: 0.030 specification
Rotor Max Parallel Variation0.005 in
Rotor Runout Limit0.004 in
Rotor Nominal Thickness From1.26 in / 1.535 in
Rotor Nominal Thickness To1.26 in / 1.535 in
Rotor Minimum Machining1.23 in / 1.48 in
Rotor Discard at or Under1.215 in / 1.465 in
Rotor Finish20-60 μin

Multi-step torque procedures OEM · verified

Cylinder Head — tightening sequence 4 stages
1all bolts22 ft. lbs
2long bolts75 degrees
3medium bolts65 degrees
455
Cylinder Head — tightening sequence 4 stages
120 ft. lbs.20 ft. lbs
255 ft. lbs.55 ft. lbs
355 ft. lbs.55 ft. lbs
490
Cylinder Head — tightening sequence 3 stages
130 ft. lbs.30 ft. lbs
260 ft. lbs.60 ft. lbs
380
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
122.0
Intake Manifold to Engine Bolts — tightening sequence 1 stages
140.0

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 6,000 mi; spark plugs every 27,000 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) · Universal Vehicle Operation (inspect idle speed)
Every 5,000 miBrake Hydraulic System (inspect fluid level) · Brake System (inspect) · CV Joint Boot (inspect) · Differential (inspect fluid level) · Parking Brake Cable (lubricate) · Power Steering System (inspect)
At 6,000 miDrive Axle Assembly (drain & refill) · Tire & Wheel Assembly (rotate)
Every 6,000 miAccessory Drive Belt (inspect) · Brake Line (inspect) · Brake Linings (inspect) · Driveshaft U-Joint (lubricate) · Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 7,500 miExhaust System (Complete) (inspect) · Tire & Wheel Assembly (rotate)
Every 12,000 miAir Cleaner Manifold Heat Control Actuator (inspect) · Tire & Wheel Assembly (rotate) · Underbody Splash Shield (inspect)
Every 15,000 miEngine Air Filter Element (replace)
Every 24,000 miAir Intake System (inspect) · Drive Axle Assembly (drain & refill) · Engine Coolant System (drain, flush & refill) · Fuel Filter (replace) · Ignition Timing (inspect) · Thermostatically Controlled Air Cleaner Assembly (inspect)
Every 27,000 miSpark Plugs (replace)

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

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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 1995 G-Series Van take?

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