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Home >> GMC >> 1990 >> Forward Control 6.2 J, Automatic, 475/M40 >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel - Standard & Electronic >> Testing >> Vehicle Speed Sensor & Digital Ratio Adapter Controller Astro, Safari, C, G, K, S & T Series >> Speedometer & Odometer Do Not Operate Properly (C/K Series)

Speedometer & Odometer Do Not Operate Properly (C/K Series)

Check that DRAC calibration clip is correctly installed in rear of instrument cluster and that proper pins are removed for calibration. See SPEEDOMETER CALIBRATION SPECIFICATIONS  at end of this article.

DRAC LOCATIONS

Model Location
Astro Under dash, right of steering column
Safari Mounted on bracket, on left side of radio
C & K, Calibration clip on rear of instrument cluster
G On left side of parking brake bracket, next
" to cruiser control module
S & T Behind glove box, mounted on ECM bracket
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