Connector Numbers

Connector Numbers:

Number Type Description

X332 5-pin, white GM-A
X253 26-pin, green GM-B
X254 26-pin, white GM-C
X255 26-pin, yellow GM-D
X256 20-pin, black RM-A up to model year '68
RM-B as of model year '89
X259 20-pin, white RM-B up to model year '88
RM-A as of model year '89