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 MANUALSCHEVROLET1990R 20 P/U 2WD V8-379 6.2L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINS
1990 Chevrolet R 20 P/U 2WD V8-379 6.2L DSL
Computers and Control Systems: Technical Service Bulletins
1990 Chevrolet R 20 P/U 2WD V8-379 6.2L DSLSECTION Technical Service Bulletins
- Customer Interest
- By Symptom
- All Technical Service Bulletins
- Engine - THIS BULLETIN HAS BEEN CANCELED
- Electrical - MIL ON/DTC's Set By Various Control Modules
- Electrical - Intermittent MIL/DTC P2138/Reduced Power
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- Rear Wheel Anti-Lock Brakes - Trouble Code 7
- Digital Ratio Adapter/Controller (DRAC) - Service
- PCM - Returned Product Feedback Program
- Oxygen Sensor Test - Revised Tech 1 Mass Storage CD
- ECM/PCM - Damaged and/or Misdiagnosed
- A/T TCC - MIL ON/False Code 32 Set Diagnostics
- PROM/MEMCAL - Identification Marks
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.
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.