GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Body and Accessories 🢒 Keyless Entry 🢒 Keyless Entry Schematics
Figure 1:

Module Power, Grounding, and DLC; Lights and Horn Control
Object Number: 657301 Size: FS
Master Electrical Component List
Keyless Entry System Description and Operation
Door Lock Controls
Gauges Fuse and Turn-B/U Fuse
IGN A Fuse and Ignition Switch
PTO Fuse, and Pwr Accy Circuit Breaker
Lighting and Battery Fuses
Door Lock Controls
Courtesy Lamps, Dome Lamp, IP Compartment Lamp Circuits
Horns Circuit
Door Lock Controls
Courtesy Lamps, Dome Lamp, IP Compartment Lamp Circuits
G202
Figure 2:

Door Lock Controls
Object Number: 657305 Size: FS
Master Electrical Component List
Keyless Entry System Description and Operation
Module Power, Grounding, and DLC; Lights and Horn Control
Stop/Haz, Radio Batt, Aux Pwr, and Cig Ltr Fuses
Lighting and Battery Fuses
Module Power, Grounding, and DLC; Lights and Horn Control
G202
Module Power, Grounding, and DLC; Lights and Horn Control