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.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET1990R 20 P/U 2WD V8-454 7.4LREPAIR AND DIAGNOSISMAINTENANCESERVICE INTERVALSNORMAL SERVICE24000 MI OR 38400 KM
1990 Chevrolet R 20 P/U 2WD V8-454 7.4L
24000 MI or 38400 KM
1990 Chevrolet R 20 P/U 2WD V8-454 7.4LSECTION 24000 MI or 38400 KM
Lubricate
Universal Joint, Drive/Propeller Shaft
(heavy duty)
Transfer Case
Linkage (if equipped, heavy duty)
Suspension
(heavy duty)
Steering
Linkage (heavy duty)
Shift Linkage, M/T
(heavy duty)
Shift Linkage, A/T
(heavy duty)
Parking Brake System
Cable guides, underbody contact points and linkage (heavy duty)
Clutch Linkage
(heavy duty)
Brake Pedal Assy
Springs (heavy duty)
Clean
Radiator
Filler neck and debris from fins (heavy duty)
Condenser HVAC
Debris from fins (heavy duty)
Check
Radiator Cooling Fan Motor
And system operation (heavy duty)
Ignition Timing
(heavy duty)
Brakes and Traction Control
(heavy duty)
Inspect
Throttle Return Spring
And controls (heavy duty)
Intake Manifold
And all intake components (heavy duty)
Idle Speed
And control device (heavy duty)
Heat Shield, Exhaust
And underhood insulation (heavy duty)
Fluid - Transfer Case
(if equipped, heavy duty)
Exhaust Gas Recirculation
(leaded fuel, heavy duty)
Evaporative Emissions System
(heavy duty)
EFE Valve
(heavy duty)
Drive Belt
(heavy duty)
Coolant Line/Hose
(heavy duty)
Air Cleaner Housing
Thermostatic controls (heavy duty)
Replace
Spark Plug
(leaded fuel, heavy duty)
Oil Filter, Engine
(heavy duty)
Fuel Filter
(heavy duty)
Fluid Filter - A/T
(heavy duty)
Fluid - Differential
When driving in dusty areas or towing a trailer (heavy duty)
Fluid - A/T
(heavy duty)
Engine Oil
(heavy duty)
Crankcase Filter
(heavy duty)
Coolant
(heavy duty)
Air Injection Filter
(if equipped, heavy duty)
Air Filter Element
(heavy duty)
Clean/Repack
Wheel Bearing
2WD heavy duty
Rotate
Tires
(heavy duty)
Flush
Cooling System
(heavy duty)
Universal Joint, Drive/Propeller Shaft
(heavy duty)
Transfer Case
Linkage (if equipped, heavy duty)
Suspension
(heavy duty)
Steering
Linkage (heavy duty)
Shift Linkage, M/T
(heavy duty)
Shift Linkage, A/T
(heavy duty)
Parking Brake System
Cable guides, underbody contact points and linkage (heavy duty)
Clutch Linkage
(heavy duty)
Brake Pedal Assy
Springs (heavy duty)
Clean
Radiator
Filler neck and debris from fins (heavy duty)
Condenser HVAC
Debris from fins (heavy duty)
Check
Radiator Cooling Fan Motor
And system operation (heavy duty)
Ignition Timing
(heavy duty)
Brakes and Traction Control
(heavy duty)
Inspect
Throttle Return Spring
And controls (heavy duty)
Intake Manifold
And all intake components (heavy duty)
Idle Speed
And control device (heavy duty)
Heat Shield, Exhaust
And underhood insulation (heavy duty)
Fluid - Transfer Case
(if equipped, heavy duty)
Exhaust Gas Recirculation
(leaded fuel, heavy duty)
Evaporative Emissions System
(heavy duty)
EFE Valve
(heavy duty)
Drive Belt
(heavy duty)
Coolant Line/Hose
(heavy duty)
Air Cleaner Housing
Thermostatic controls (heavy duty)
Replace
Spark Plug
(leaded fuel, heavy duty)
Oil Filter, Engine
(heavy duty)
Fuel Filter
(heavy duty)
Fluid Filter - A/T
(heavy duty)
Fluid - Differential
When driving in dusty areas or towing a trailer (heavy duty)
Fluid - A/T
(heavy duty)
Engine Oil
(heavy duty)
Crankcase Filter
(heavy duty)
Coolant
(heavy duty)
Air Injection Filter
(if equipped, heavy duty)
Air Filter Element
(heavy duty)
Clean/Repack
Wheel Bearing
2WD heavy duty
Rotate
Tires
(heavy duty)
Flush
Cooling System
(heavy duty)
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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.