gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Diesel Engine/Fuel System - Checklist/Diagnostic Charts|Page 2022 > < Diesel Engine/Fuel System - Checklist/Diagnostic Charts|Page 2020
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FIGURE 1 - DEPRESSING ROCKER LEVER

Depressing Rocker Lever
Idling engine sound should change when lever is depressed.  If it does not, pump should be removed and sent to an authorized agency for repairs.

Diesel Engine/Fuel System - Checklist/Diagnostic Charts|Page 2022 > < Diesel Engine/Fuel System - Checklist/Diagnostic Charts|Page 2020