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 MANUALSCHEVROLET1983BLAZER FULL SIZE V8-379 6.2L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULETECHNICAL SERVICE BULLETINSHEI MODULE - TESTING UPDATE
1983 Chevrolet Blazer Full Size V8-379 6.2L DSL
HEI Module - Testing Update
1983 Chevrolet Blazer Full Size V8-379 6.2L DSLSECTION HEI Module - Testing Update
Number: 83-I-74
Section: VIt
Date: May, 1983
Subject: HEI MODULE TESTING
TO: ALL CHEVROLET DEALERS
Known good HEI modules and new modules from service stock may fail a test using the HEI tester, J-24642, if the tester ground is improperly connected. When using the tester, connect or contact the alligator clip for the tester ground directly to the flat metal surface on the bottom of the HEI module (see illustrations). The metal eyelet on the module is not always in contact with the metal ground surface on the bottom on the module and, therefore, should not be used when testing the module.
Section: VIt
Date: May, 1983
METAL OUTLET:
Subject: HEI MODULE TESTING
TO: ALL CHEVROLET DEALERS
Known good HEI modules and new modules from service stock may fail a test using the HEI tester, J-24642, if the tester ground is improperly connected. When using the tester, connect or contact the alligator clip for the tester ground directly to the flat metal surface on the bottom of the HEI module (see illustrations). The metal eyelet on the module is not always in contact with the metal ground surface on the bottom on the module and, therefore, should not be used when testing the module.
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.