2008 Chevrolet (Chevy) Silverado 1500 SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

Fig. 1: Automatic A/C Circuit (1 of 3)

Fig. 2: Automatic A/C Circuit (2 of 3)

Fig. 3: Automatic A/C Circuit (3 of 3)

Fig. 4: Compressor Circuit

Fig. 5: Manual A/C Circuit (1 of 3)

Fig. 6: Manual A/C Circuit (2 of 3)

Fig. 7: Manual A/C Circuit (3 of 3)

ANTI-LOCK BRAKES

Fig. 8: Anti-Lock Brake Circuit, W/ JL4 (1 of 2)

Fig. 9: Anti-Lock Brake Circuit, W/ JL4 (2 of 2)

Fig. 10: Anti-Lock Brake Circuit, W/O JL4

Fig. 11: Trailer ABS Circuit

ANTI-THEFT

Fig. 12: Anti-theft Circuit

BODY CONTROL MODULES

Fig. 13: Body Control Modules Circuit (1 of 3)

Fig. 14: Body Control Modules Circuit (2 of 3)

Fig. 15: Body Control Modules Circuit (3 of 3)

COMPUTER DATA LINES

Fig. 16: Computer Data Lines Circuit (1 of 2)

Fig. 17: Computer Data Lines Circuit (2 of 2)

COOLING FAN

Fig. 18: Cooling Fan Circuit

CRUISE CONTROL

4.3L VIN X

Fig. 19: 4.3L VIN X, Cruise Control Circuit

4.8L VIN C

Fig. 20: 4.8L VIN C, Cruise Control Circuit

5.3L VIN 0

Fig. 21: 5.3L VIN 0, Cruise Control Circuit

5.3L VIN 3

Fig. 22: 5.3L VIN 3, Cruise Control Circuit

5.3L VIN J

Fig. 23: 5.3L VIN J, Cruise Control Circuit

5.3L VIN M

Fig. 24: 5.3L VIN M, Cruise Control Circuit

6.0L VIN Y

Fig. 25: 6.0L VIN Y, Cruise Control Circuit

DEFOGGERS

Fig. 26: Heated Mirrors Circuit, W/ AN3/DL3

Fig. 27: Heated Mirrors Circuit, W/O AN3/DL3

Fig. 28: Rear Defogger Circuit

ENGINE PERFORMANCE

4.3L VIN X

Fig. 29: 4.3L VIN X, Engine Performance Circuit (1 of 4)

Fig. 30: 4.3L VIN X, Engine Performance Circuit (2 of 4)

Fig. 31: 4.3L VIN X, Engine Performance Circuit (3 of 4)

Fig. 32: 4.3L VIN X, Engine Performance Circuit (4 of 4)

4.8L VIN C

Fig. 33: 4.8L VIN C, Engine Performance Circuit (1 of 5)

Fig. 34: 4.8L VIN C, Engine Performance Circuit (2 of 5)

Fig. 35: 4.8L VIN C, Engine Performance Circuit (3 of 5)

Fig. 36: 4.8L VIN C, Engine Performance Circuit (4 of 5)

Fig. 37: 4.8L VIN C, Engine Performance Circuit (5 of 5)

5.3L VIN 0

Fig. 38: 5.3L VIN 0, Engine Performance Circuit (1 of 4)

Fig. 39: 5.3L VIN 0, Engine Performance Circuit (2 of 4)

Fig. 40: 5.3L VIN 0, Engine Performance Circuit (3 of 4)

Fig. 41: 5.3L VIN 0, Engine Performance Circuit (4 of 4)

5.3L VIN 3

Fig. 42: 5.3L VIN 3, Engine Performance Circuit (1 of 4)

Fig. 43: 5.3L VIN 3, Engine Performance Circuit (2 of 4)

Fig. 44: 5.3L VIN 3, Engine Performance Circuit (3 of 4)

Fig. 45: 5.3L VIN 3, Engine Performance Circuit (4 of 4)

5.3L VIN J

Fig. 46: 5.3L VIN J, Engine Performance Circuit (1 of 5)

Fig. 47: 5.3L VIN J, Engine Performance Circuit (2 of 5)

Fig. 48: 5.3L VIN J, Engine Performance Circuit (3 of 5)

Fig. 49: 5.3L VIN J, Engine Performance Circuit (4 of 5)

Fig. 50: 5.3L VIN J, Engine Performance Circuit (5 of 5)

5.3L VIN M

Fig. 51: 5.3L VIN M, Engine Performance Circuit (1 of 5)

Fig. 52: 5.3L VIN M, Engine Performance Circuit (2 of 5)

Fig. 53: 5.3L VIN M, Engine Performance Circuit (3 of 5)

Fig. 54: 5.3L VIN M, Engine Performance Circuit (4 of 5)

Fig. 55: 5.3L VIN M, Engine Performance Circuit (5 of 5)

6.0L VIN Y

Fig. 56: 6.0L VIN Y, Engine Performance Circuit (1 of 5)

Fig. 57: 6.0L VIN Y, Engine Performance Circuit (2 of 5)

Fig. 58: 6.0L VIN Y, Engine Performance Circuit (3 of 5)

Fig. 59: 6.0L VIN Y, Engine Performance Circuit (4 of 5)

Fig. 60: 6.0L VIN Y, Engine Performance Circuit (5 of 5)

EXTERIOR LIGHTS

Fig. 61: Backup Lamps Circuit

Fig. 62: Exterior Lamps Circuit (1 of 3)

Fig. 63: Exterior Lamps Circuit (2 of 3)

Fig. 64: Exterior Lamps Circuit (3 of 3)

Fig. 65: Trailer Tow Circuit

GROUND DISTRIBUTION

Fig. 66: Ground Distribution Circuit (1 of 6)

Fig. 67: Ground Distribution Circuit (2 of 6)

Fig. 68: Ground Distribution Circuit (3 of 6)

Fig. 69: Ground Distribution Circuit (4 of 6)

Fig. 70: Ground Distribution Circuit (5 of 6)

Fig. 71: Ground Distribution Circuit (6 of 6)

HEADLIGHTS

Fig. 72: Headlights Circuit

HORN

Fig. 73: Horn Circuit

INSTRUMENT CLUSTER

Fig. 74: Instrument Cluster Circuit (1 of 2)

Fig. 75: Instrument Cluster Circuit (2 of 2)

INTERIOR LIGHTS

Fig. 76: Courtesy Lamps Circuit, W/ AN3/DL3

Fig. 77: Courtesy Lamps Circuit, W/O AN3/DL3

Fig. 78: Instrument Illumination Circuit (1 of 2)

Fig. 79: Instrument Illumination Circuit (2 of 2)

MEMORY SYSTEMS

Fig. 80: Adjustable Pedal Circuit

Fig. 81: Driver"s Memory Seat Circuit (1 of 2)

Fig. 82: Driver"s Memory Seat Circuit (2 of 2)

NAVIGATION

Fig. 83: Navigation Circuit, W/ Y91 & W/ UQA (1 of 3)

Fig. 84: Navigation Circuit, W/ Y91 & W/ UQA (2 of 3)

Fig. 85: Navigation Circuit, W/ Y91 & W/ UQA (3 of 3)

Fig. 86: Navigation Circuit, W/ Y91 & W/O UQA (1 of 3)

Fig. 87: Navigation Circuit, W/ Y91 & W/O UQA (2 of 3)

Fig. 88: Navigation Circuit, W/ Y91 & W/O UQA (3 of 3)

Fig. 89: Navigation Circuit, W/O Y91 & W/ UQA (1 of 3)

Fig. 90: Navigation Circuit, W/O Y91 & W/ UQA (2 of 3)

Fig. 91: Navigation Circuit, W/O Y91 & W/ UQA (3 of 3)

Fig. 92: Navigation Circuit, W/O Y91 & W/O UQA (1 of 3)

Fig. 93: Navigation Circuit, W/O Y91 & W/O UQA (2 of 3)

Fig. 94: Navigation Circuit, W/O Y91 & W/O UQA (3 of 3)

Fig. 95: Parking Assistant Circuit

POWER DISTRIBUTION

4.3L VIN X

Fig. 96: 4.3L VIN X, Power Distribution Circuit (1 of 6)

Fig. 97: 4.3L VIN X, Power Distribution Circuit (2 of 6)

Fig. 98: 4.3L VIN X, Power Distribution Circuit (3 of 6)

Fig. 99: 4.3L VIN X, Power Distribution Circuit (4 of 6)

Fig. 100: 4.3L VIN X, Power Distribution Circuit (5 of 6)

Fig. 101: 4.3L VIN X, Power Distribution Circuit (6 of 6)

4.8L VIN C

Fig. 102: 4.8L VIN C, Power Distribution Circuit (1 of 6)

Fig. 103: 4.8L VIN C, Power Distribution Circuit (2 of 6)

Fig. 104: 4.8L VIN C, Power Distribution Circuit (3 of 6)

Fig. 105: 4.8L VIN C, Power Distribution Circuit (4 of 6)

Fig. 106: 4.8L VIN C, Power Distribution Circuit (5 of 6)

Fig. 107: 4.8L VIN C, Power Distribution Circuit (6 of 6)

5.3L VIN 0

Fig. 108: 5.3L VIN 0, Power Distribution Circuit (1 of 6)

Fig. 109: 5.3L VIN 0, Power Distribution Circuit (2 of 6)

Fig. 110: 5.3L VIN 0, Power Distribution Circuit (3 of 6)

Fig. 111: 5.3L VIN 0, Power Distribution Circuit (4 of 6)

Fig. 112: 5.3L VIN 0, Power Distribution Circuit (5 of 6)

Fig. 113: 5.3L VIN 0, Power Distribution Circuit (6 of 6)

5.3L VIN 3

Fig. 114: 5.3L VIN 3, Power Distribution Circuit (1 of 6)

Fig. 115: 5.3L VIN 3, Power Distribution Circuit (2 of 6)

Fig. 116: 5.3L VIN 3, Power Distribution Circuit (3 of 6)

Fig. 117: 5.3L VIN 3, Power Distribution Circuit (4 of 6)

Fig. 118: 5.3L VIN 3, Power Distribution Circuit (5 of 6)

Fig. 119: 5.3L VIN 3, Power Distribution Circuit (6 of 6)

5.3L VIN J

Fig. 120: 5.3L VIN J, Power Distribution Circuit (1 of 6)

Fig. 121: 5.3L VIN J, Power Distribution Circuit (2 of 6)

Fig. 122: 5.3L VIN J, Power Distribution Circuit (3 of 6)

Fig. 123: 5.3L VIN J, Power Distribution Circuit (4 of 6)

Fig. 124: 5.3L VIN J, Power Distribution Circuit (5 of 6)

Fig. 125: 5.3L VIN J, Power Distribution Circuit (6 of 6)

5.3L VIN M

Fig. 126: 5.3L VIN M, Power Distribution Circuit (1 of 6)

Fig. 127: 5.3L VIN M, Power Distribution Circuit (2 of 6)

Fig. 128: 5.3L VIN M, Power Distribution Circuit (3 of 6)

Fig. 129: 5.3L VIN M, Power Distribution Circuit (4 of 6)

Fig. 130: 5.3L VIN M, Power Distribution Circuit (5 of 6)

Fig. 131: 5.3L VIN M, Power Distribution Circuit (6 of 6)

6.0L VIN Y

Fig. 132: 6.0L VIN Y, Power Distribution Circuit (1 of 6)

Fig. 133: 6.0L VIN Y, Power Distribution Circuit (2 of 6)

Fig. 134: 6.0L VIN Y, Power Distribution Circuit (3 of 6)

Fig. 135: 6.0L VIN Y, Power Distribution Circuit (4 of 6)

Fig. 136: 6.0L VIN Y, Power Distribution Circuit (5 of 6)

Fig. 137: 6.0L VIN Y, Power Distribution Circuit (6 of 6)

POWER DOOR LOCKS

Fig. 138: Power Door Locks Circuit, Base

Fig. 139: Power Door Locks Circuit, Premium

POWER MIRRORS

Fig. 140: Electrochromic Mirror Circuit

Fig. 141: Power Mirrors Circuit, Manual Foldiing Mirror

Fig. 142: Power Mirrors Circuit, Power Foldiing Mirror (1 of 2)

Fig. 143: Power Mirrors Circuit, Power Foldiing Mirror (2 of 2)

POWER SEATS

Fig. 144: Adjustable Pedal Circuit

Fig. 145: Driver Power Seat Circuit

Fig. 146: Heated Seats Circuit (1 of 2)

Fig. 147: Heated Seats Circuit (2 of 2)

Fig. 148: Heated Steering Wheel Circuit

Fig. 149: Passenger Power Seat Circuit, 6-Way Power Seat

Fig. 150: Passenger Power Seat Circuit, 8-Way Power Seat

POWER TOP/SUNROOF

Fig. 151: Power Top/Sunroof Circuit

POWER WINDOWS

Fig. 152: Power Windows Circuit, W/ AN3/DL3

Fig. 153: Power Windows Circuit, W/O AN3/DL3

Fig. 154: Sliding Rear Window Circuit

RADIO

Fig. 155: Radio Circuit, W/ Y91 & W/ UQA (1 of 3)

Fig. 156: Radio Circuit, W/ Y91 & W/ UQA (2 of 3)

Fig. 157: Radio Circuit, W/ Y91 & W/ UQA (3 of 3)

Fig. 158: Radio Circuit, W/ Y91 & W/O UQA (1 of 3)

Fig. 159: Radio Circuit, W/ Y91 & W/O UQA (2 of 3)

Fig. 160: Radio Circuit, W/ Y91 & W/O UQA (3 of 3)

Fig. 161: Radio Circuit, W/O Y91 & W/ UQA (1 of 3)

Fig. 162: Radio Circuit, W/O Y91 & W/ UQA (2 of 3)

Fig. 163: Radio Circuit, W/O Y91 & W/ UQA (3 of 3)

Fig. 164: Radio Circuit, W/O Y91 & W/O UQA (1 of 3)

Fig. 165: Radio Circuit, W/O Y91 & W/O UQA (2 of 3)

Fig. 166: Radio Circuit, W/O Y91 & W/O UQA (3 of 3)

SHIFT INTERLOCK

Fig. 167: Shift Interlock Circuit

STARTING/CHARGING

4.3L VIN X

Fig. 168: 4.3L VIN X, Charging Circuit

Fig. 169: 4.3L VIN X, Starting Circuit

4.8L VIN C

Fig. 170: 4.8L VIN C, Charging Circuit

Fig. 171: 4.8L VIN C, Starting Circuit

5.3L VIN 0

Fig. 172: 5.3L VIN 0, Charging Circuit

Fig. 173: 5.3L VIN 0, Starting Circuit

5.3L VIN 3

Fig. 174: 5.3L VIN 3, Charging Circuit

Fig. 175: 5.3L VIN 3, Starting Circuit

5.3L VIN J

Fig. 176: 5.3L VIN J, Charging Circuit

Fig. 177: 5.3L VIN J, Starting Circuit

5.3L VIN M

Fig. 178: 5.3L VIN M, Charging Circuit

Fig. 179: 5.3L VIN M, Starting Circuit

6.0L VIN Y

Fig. 180: 6.0L VIN Y, Charging Circuit

Fig. 181: 6.0L VIN Y, Starting Circuit

SUPPLEMENTAL RESTRAINTS

Fig. 182: Supplemental Restraints Circuit (1 of 2)

Fig. 183: Supplemental Restraints Circuit (2 of 2)

TRANSMISSION

Fig. 184: A/T Circuit (1 of 2)

Fig. 185: A/T Circuit (2 of 2)

Fig. 186: Transfer Case Circuit, 2-Speed Automatic

Fig. 187: Transfer Case Circuit, 2-Speed Manual

WARNING SYSTEMS

Fig. 188: Warning Systems Circuit, W/ AN3/DL3 (1 of 2)

Fig. 189: Warning Systems Circuit, W/ AN3/DL3 (2 of 2)

Fig. 190: Warning Systems Circuit, W/O AN3/DL3 (1 of 2)

Fig. 191: Warning Systems Circuit, W/O AN3/DL3 (2 of 2)

WIPER/WASHER

Fig. 192: Moisture Sensor Circuit

Fig. 193: Windshield Washer Solvent Heater Circuit

Fig. 194: Wiper/Washer Circuit