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Shift Light Chevrolet Astro I

Theory & Operation 28 illustrations ~549 words

Shift light may be used on vehicles equipped with manual transmission. Light indicates best transmission shift point for maximum fuel economy. Power for light is supplied through GAUGES fuse. Light illuminates when control module supplies a ground circuit for bulb. For wiring reference, see wiring schematics under MISCELLANEOUS PCM CONTROLS in SYSTEM/COMPONENT TESTS - 4.3L article.

Wiring Diagram (Astro & Safari 4.3L VIN W - 1 Of 2). Scheme 1

Scheme 1: Wiring Diagram (Astro & Safari 4.3L VIN W - 1 Of 2)

Scheme 1: Wiring Diagram (Astro & Safari 4.3L VIN W - 1 Of 2)

Wiring Diagram (Astro & Safari 4.3L VIN W - 2 Of 2). Scheme 2

Scheme 2: Wiring Diagram (Astro & Safari 4.3L VIN W - 2 Of 2)

Scheme 2: Wiring Diagram (Astro & Safari 4.3L VIN W - 2 Of 2)

Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 1 Of 3). Scheme 3

Scheme 3: Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 1 Of 3)

Scheme 3: Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 1 Of 3)

Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 2 Of 3). Scheme 4

Scheme 4: Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 2 Of 3)

Scheme 4: Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 2 Of 3)

Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 3 Of 3). Scheme 5

Scheme 5: Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 3 Of 3)

Scheme 5: Wiring Diagram ("C" & "K" Series Pickup, Sierra - 4.3L W/ A/T - 3 Of 3)

Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 1 Of 3). Scheme 6

Scheme 6: Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 1 Of 3)

Scheme 6: Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 1 Of 3)

Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 2 Of 3). Scheme 7

Scheme 7: Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 2 Of 3)

Scheme 7: Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 2 Of 3)

Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 3 Of 3). Scheme 8

Scheme 8: Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 3 Of 3)

Scheme 8: Wiring Diagram ("C" & "K" Series Pickup & Sierra - 4.3L W/ M/T - 3 Of 3)

Wiring Diagram ("P" Series - 4.3L With M/T - 1 Of 2). Scheme 9

Scheme 9: Wiring Diagram ("P" Series - 4.3L With M/T - 1 Of 2)

Scheme 9: Wiring Diagram ("P" Series - 4.3L With M/T - 1 Of 2)

Wiring Diagram ("P" Series - 4.3L With M/T - 2 Of 2). Scheme 10

Scheme 10: Wiring Diagram ("P" Series - 4.3L With M/T - 2 Of 2)

Scheme 10: Wiring Diagram ("P" Series - 4.3L With M/T - 2 Of 2)

Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 1 Of 3). Scheme 11

Scheme 11: Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 1 Of 3)

Scheme 11: Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 1 Of 3)

Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 2 Of 3). Scheme 12

Scheme 12: Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 2 Of 3)

Scheme 12: Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 2 Of 3)

Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 3 Of 3). Scheme 13

Scheme 13: Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 3 Of 3)

Scheme 13: Wiring Diagram ("P" Series - Commercial Van & Motorhome - 4.3L W/ 4L80-E - 3 Of 3)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/PCM - 1 Of 2). Scheme 14

Scheme 14: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/PCM - 1 Of 2)

Scheme 14: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/PCM - 1 Of 2)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/PCM - 2 Of 2). Scheme 15

Scheme 15: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/PCM - 2 Of 2)

Scheme 15: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/PCM - 2 Of 2)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 1 Of 3). Scheme 16

Scheme 16: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 1 Of 3)

Scheme 16: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 1 Of 3)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 2 Of 3). Scheme 17

Scheme 17: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 2 Of 3)

Scheme 17: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 2 Of 3)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 3 Of 3). Scheme 18

Scheme 18: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 3 Of 3)

Scheme 18: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN W W/VCM - 3 Of 3)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/PCM - 1 Of 2). Scheme 19

Scheme 19: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/PCM - 1 Of 2)

Scheme 19: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/PCM - 1 Of 2)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/PCM - 2 Of 2). Scheme 20

Scheme 20: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/PCM - 2 Of 2)

Scheme 20: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/PCM - 2 Of 2)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/VCM - 1 Of 2). Scheme 21

Scheme 21: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/VCM - 1 Of 2)

Scheme 21: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/VCM - 1 Of 2)

Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/VCM - 2 Of 2). Scheme 22

Scheme 22: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/VCM - 2 Of 2)

Scheme 22: Wiring Diagram ("S" & "T" Blazer, Jimmy, Pickup & Sonoma - 4.3L VIN Z W/VCM - 2 Of 2)

Wiring Diagram (Van - 4.3L With 4L60-E - 1 Of 3). Scheme 23

Scheme 23: Wiring Diagram (Van - 4.3L With 4L60-E - 1 Of 3)

Scheme 23: Wiring Diagram (Van - 4.3L With 4L60-E - 1 Of 3)

Wiring Diagram (Van - 4.3L With 4L60-E - 2 Of 3). Scheme 24

Scheme 24: Wiring Diagram (Van - 4.3L With 4L60-E - 2 Of 3)

Scheme 24: Wiring Diagram (Van - 4.3L With 4L60-E - 2 Of 3)

Wiring Diagram (Van - 4.3L With 4L60-E - 3 Of 3). Scheme 25

Scheme 25: Wiring Diagram (Van - 4.3L With 4L60-E - 3 Of 3)

Scheme 25: Wiring Diagram (Van - 4.3L With 4L60-E - 3 Of 3)

Wiring Diagram (Van - 4.3L With 4L80-E - 1 Of 3). Scheme 26

Scheme 26: Wiring Diagram (Van - 4.3L With 4L80-E - 1 Of 3)

Scheme 26: Wiring Diagram (Van - 4.3L With 4L80-E - 1 Of 3)

Wiring Diagram (Van - 4.3L With 4L80-E - 2 Of 3). Scheme 27

Scheme 27: Wiring Diagram (Van - 4.3L With 4L80-E - 2 Of 3)

Scheme 27: Wiring Diagram (Van - 4.3L With 4L80-E - 2 Of 3)

Wiring Diagram (Van - 4.3L With 4L80-E - 3 Of 3). Scheme 28

Scheme 28: Wiring Diagram (Van - 4.3L With 4L80-E - 3 Of 3)

Scheme 28: Wiring Diagram (Van - 4.3L With 4L80-E - 3 Of 3)