Operation CHARM
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GMC Truck
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1991
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S15/T15 2WD Jimmy V6-262 4.3L
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Repair and Diagnosis
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Transmission and Drivetrain
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Automatic Transmission/Transaxle
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Service and Repair
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Overhaul
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3L30 (180/180C) Automatic Transmission
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Subassembly Service
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Detent Valve & Modulator
Detent Valve & Modulator
1. Inspect detent valve and valve sleeve for nicks, scratches, and scoring.
2. Inspect modulator valve, valve sleeve and plunger for nicks, scratches and scoring.