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:

Power Brake Booster Fluid Flow Switch


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