C 20 3/4 Ton Pickup 2WD V8-350 5.7L VIN L 4-bbl (1983)
QDR Application Chart
QDR Application Chart For CHART C-1
The following chart contains ECM QDR arrangement for all ECM models thru 1987.*
Important Note:
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Many 82-83 ECMs did not use QDRs, and will not appear on the chart.
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This procedure will not work on any ECM Service Number which does not appear on the chart. (This is because such an ECM does not contain
QDRs.)
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Not all available QDR outputs are used for ECM application. Verify circuit usage from the ECM wiring diagrams for each specific engine using
Section "6E" of the service manual.
*Additional ECMs listed on page 4
