Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSGMC1973P35/P3500 VAN 7.4L ENG VIN ZREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICALTUNE-UP - V8ENGINECAPACITIES

1973 GMC P35/P3500 Van 7.4L Eng VIN Z

Tune-Up - V8: Engine: Capacities

1973 GMC P35/P3500 Van 7.4L Eng VIN ZSECTION Capacities

Application

Quantity

Crankcase

⁽¹⁾ 5 qts.

Automatic Transmission

Drain & Refill

4 qts.

Total Capacity

10 qts.

Final Drive

4 pts.

Fuel Tank

2 tanks, 25 gals. ea.

LPG Tank

Standard

44.5 lbs.

Optional

65 lbs.

Cooling System

21 qts.

⁽¹⁾	Add one quart with filter change.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.