GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Front Chassis Harness to Brake Components


Object Number: 231480  Size: LF
(1)Power Brake Booster Pump (JE3)
(2)Power Brake Booster Pump Motor (JE3)
(3)Brake Fluid Level Switch (JE3)
Figure 2:

Front Chassis Harness to Brake Components (JE3)


Object Number: 231487  Size: LF
(1)Brake Fluid Flow Switch
(2)Electronic Brake Control Module (EBCM) (JE3) Connecor C2 (2 cavities)
(3)Electronic Brake Control Module (EBCM) (JE3) Connector C1 (24 cavities)
(4)Electronic Brake Control Module (EBCM) (JE3)
Figure 3:

Power Brake Booster Fluid Flow Switch


Object Number: 397148  Size: LF
(1)Power Brake Booster Fluid Flow Switch
Figure 4:

Fuse Blocks


Object Number: 231696  Size: LF
(1)Power Brake Booster Pump Motor Relay
(2)Fuse Block 2
(3)Front Chassis Harness
(4)Positive Battery Cable Feed
(5)Fuse Block 1