C 30 1 Ton Pickup 2WD V8-350 5.7L VIN M 4-bbl (1983)
Auxiliary Fuel Tank Control: Technical Service Bulletins
Fuel - New Dash-Mounted Fuel Tank Selector Switch
85-156
8C
NOV.., 1985
Subject:
FUEL TANK SWITCH
Model and Year:
1983-85 C/K MODEL TRUCKS WITH DUAL FUEL TANKS (RPO NL2)
TO:
ALL CHEVROLET DEALERS
Figure No. 1
Effective interim 1985, a new dash-mounted fuel transfer switch was released. This dash-mounted switch features contacts which are self-cleaning, to
prevent circuit failure.
The part number for the new switch is 15591149.
This new switch can be identified by the sliding contacts, which are visible from the side (See Figure No. 1). The new switch is interchangeable with the
former switch.
