Full Size Cad RWD V8-350 5.7L DSL (1984)
Fuel Pump Relay: All Technical Service Bulletins
Fuel Pump Relay - Code 20 Set
Bulletin No. T
87-66
File in Group
6E
Number
40
Corp. Ref. No.
416502
Date
Jan. '87
SUBJECT:
CODE 20 - INCORRECT FUEL PUMP RELAY
MODELS AFFECTED: 1981 DE VILLE, ELDORADO AND SEVILLE 1981-1984 LIMOUSINES
Figure 1
Figure 2
Two types of relays were packaged under P/N 1626239 by GMSPO. The correct relay will have the P/N 1626239 and the electrical schematic (Figure 1)
molded into the relay cover. The incorrect relay will have P/N 12033768 on a paper label with P/N 1623924 and the electrical schematic (Figure 2)
molded into the relay cover. Installing the incorrect relay in 1981-1984 vehicles equipped with 6.0 liter engines (V-8/6/4) as a fuel pump relay will
immediately damage the ECM and set a code 20.
The relay cover MUST be inspected for the correct part number before installing it for use as a fuel pump relay in 1981-1984 vehicles equipped with 6.0
liter engines (V-8/6/4).