GM Service Manual Online
For 1990-2009 cars only

Reference on Schematic

Section Number - Subsection Name

Data Link Connector (DLC) Cell 50

8 -- Data Link Communications

Ground Distribution Cell 14

8 -- Wiring Systems

Instrument Cluster Cell 81 (Buick w/U23)

8 -- Instrument Panel, Gauges and Console

Instrument Cluster Cell 81 (Buick w/UB3)

8 -- Instrument Panel, Gauges and Console

Instrument Cluster Cell 81 (Oldsmobile)

8 -- Instrument Panel, Gauges and Console

Instrument Cluster Cell 81 (Pontiac w/U50/U2F)

8 -- Instrument Panel, Gauges and Console

Power Distribution Cell 10

8 -- Wiring Systems