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

Relay Blocks


Object Number: 561847  Size: LF
(1)Data Link Connector
(2)Relay Block 2
(3)Relay Block 1
(4)Brake Pedal
Figure 2:

Relay Blocks Internals


Object Number: 561850  Size: LF
(1)RR Door Unlock Relay
(2)DR Door Unlock Relay
(3)Relay Block 1
(4)CTSY LP Relay
(5)Inadvertant Power Relay
(6)RAP Relay
(7)Relay Block 2
(8)DRL Relay