C 20 3/4 Ton Pickup 2WD V8-379 6.2L DSL VIN C FI (1983)
![background image](/chevrolet/c_20_3/4_ton_pickup_2wd/v8-379_6.2l_dsl_vin_c_fi/Page-466004.png)
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.