Page 1 of 5 2008 Chevrolet Silverado 6.6L Eng VIN 62500 HD Service Manual: SYSTEM WIRING DIGRMS - 2500 HD Print Date: DISTRIBUTION > 6.6L VIN 6 Fig 1: 6.6L VIN 6, Power Distribution Circuit (1 of 5) ERY STRTER WRECKER (IN ROOF CONSOLE) ROOF FUSIBLE LINK 1 (14 G- RED/) 86 87 WRECKER S ERY (INFO NOT VILBLE) MEG 175 MEG 1 MEG 175 HOLDER ( SIDE OF FIREWLL) WRECKER ROOF WIRING BUILDER GENERTOR 12V SUPPLY (IN JUMPER J209 GLOW PLUG (GPCM) DUL GENERTOR UXILIRY GENERTOR FROM I/P B INTKE IR (IH) I/P TO ROOF BECON J200 I/P B D B C MOBILE (12V SUPPLY) (BEHIND (ON FRONT CORNER OF ) (IN JUMPER J224 (IN JUMPER J211 (IN JUMPER J210 J219 LT GRN LT BLU RED/WHT RED/WHT G103 (ON FRONT OF CYLINDER HED) MOBILE TO STUD 1 63 C IPC 43 ECM- 11 TCM- 7 HDLP WSH 20 36 LTR 50 STUD 2 58 WSHTR 61 ITBC 19 TREC 62 SEO B2 34 ( MNUL I/P 1 DT LINK CONNECTOR (DLC) & UTO 4X4 UTO 4X4 J203 INSTRUMENT PNEL CLUSTER (IPC) 275332 ENGINE (ECM) TRNSMISSION (TCM) (ON FRONT CORNER OF ) WSHER SOLVENT CSE ENCODER MOTOR

Page 2 of 5 Fig 2: 6.6L VIN 6, Power Distribution Circuit (2 of 5) FROM IPC 43 C 1 OF 5) STUD 1 63 S/ROOF 31 BLWR 65 LBEC 2 67 ELEC RUN BORD 60 MBEC 1 64 BS-1 56 BS-2 8 HEVY DUTY BS 55 D TO LGM 66 ( ELECTRICL LRM BULB & O CMPER TRUCK HD WIRING HRNESS ELECTRICL LRM BULB & CMPER I/P COMFORT CTIVE & VCUUM HYDRULIC (IN CMPER J414 (EBCM) ROOF BECON 2 BREKER CB3 PWR WNDW BREKER CB4 PSS 1 BREKER CB2 RT DOORS BREKER CB1 I/P DJUSTER SYSTEM DJUSTER CMPER CONNECTOR FROM I/P 1 OF 5) WRECKER ROOF & BECON ROOF BLOWER MOTOR ROOF BECON (IN OVERHED CONSOLE) O (IN SLIDING JUMPER J336 1 2 O ( ) J315 MIRROR I/P O MIRROR 2 ROOF BECON J323 1 ROOF MOUNTED BECON (ON FRONT CORNER OF ) MEMORY (MSM) DJUSTER SLIDING OPEN SLIDING CLOSE LUMBR DJUSTER I/P SIDE OF CTSY RT STOP TRN DIM BCM COOLED S DSM DDM PWR MIR 2 WPR OBS DET FROM PDM E LT DR BREKER I/P ( SIDE OF COMFORT & DECOR LEVEL 3 O COMFORT & DECOR LEVEL 3 MIRROR O MIRROR MIRROR O MIRROR F FROM PDM 275333 REMOTE DOOR LOCK RECEIVER MEMORY (MSM) VIEW MIRROR OBJECT ( PRKING SSIST)

Page 3 of 5 Fig 3: 6.6L VIN 6, Power Distribution Circuit (3 of 5) FROM HEVY DUTY BS D 55 LGM 66 42 MP 38 ESC/LC EXH 1 LC/COMP 54 RDO 39 EXP/PTO 44 LBEC 1 59 G TO DLIS 32 ( O O O I/P I/P (IN INSTRUMENT PNEL HRNESS, 19 CM FTER CONNECTOR BREKOUT) J204 (IN PTO JUMPER ( TKE ) J127 H TO HED CURTIN TKE MNUL SENSING & DIGNOSTIC PRESENCE (SDM) SYSTEM (PPS) ROLLOVER UDIO MPLIFIER (PREMIUM UDIO BRNDED MPLIFIER SPEKER SYSTEM) DIGITL UDIO (RS) RECEIVER (IF (IF EQUIPPED) EQUIPPED) CHIME TKE (PTO) WSHER SOLVENT UNLOCK LOCK INFO LOCK/UNLOCK LOCKS O FRONT & MIRROR CREW CB UX PWR 2 ENT 5 UX PWR STOP S IS LPS LT STOP TRN TO LT DR E BREKER PDM ( COMFORT 3 & ) I/P ( SIDE OF O ENTERTIN- MENT Z3 O UNIVERSL GRGE DOOR OPENER WRECKER, ROOF & ROOF BECON I/P I/P CENTER 1 2 I/P SIDE OF 2 I/P SIDE OF I/P MIRROR J4 CUSTOM CONSOLE FRONT COMPT FLOOR I/P 2 F TO I/P 275334 COMMUNICTION INTERFCE (VCIM) VIDEO DISPLY G4 (ON LOWER CENTER "B" CONSOLE PILLR) COMPRTMENT 1 PERFORMNCE ENHNCED UDIO 2 PREMIUM UDIO BRNDED MPLIFIER SPEKER SYSTEM CENTER CONSOLE 3 4 J203 I/P 2 D1 X3 X2 J200 GRGE DOOR OPENER (GDO) (ON FRONT CORNER OF ) EDITION 3 MERCHNDISED COMFORT 3 4

Page 4 of 5 Fig 4: 6.6L VIN 6, Power Distribution Circuit (4 of 5) FROM LBEC 1 59 G DLIS 32 2 J TO RUN/CRNK 5 OF 5) ( MOISTURE MOISTURE J212 (IN COLUMN I/P I/P ITION STRT CC RUN CC STRT STRT RUN CC RUN CC RUN STRT (IN COLUMN J213 B5 X201 0 10 SERIES, UTO 4X4 & 10 SERIES 10 SERIES, UTO 4X4 & CC VOLT 12V THEFT DETERRENT (TDM) & UTO 4X4 (IN INSTRUMENT PNEL HRNESS, IN CONNECTOR BREKOUT) J207 O & UTO 4X4 K TO 5 OF 5) EXCEPT COMFORT O MIRROR COMFORT O MIRROR H FROM 1 & CRUISE 2 O & CRUISE 4 SPEED, & CRUISE (IN THE COLUMN J216 6 SPEED PNK 1 2 (IN ENGINE HRNESS, 5 CM FROM ENGINE CONNECTOR BREKOUT) J104 I/P SIDE OF 12V SUPPLY EXCEPT COMFORT O MIRROR J231 COMFORT O MIRROR I/P O COIL TRNSMISSION MNUL SHIFT TRNSMISSION SHIFT LEVER J217 (IN HRNESS, 9 CM FROM COIL X2) B 275335 GLOW PLUG (GPCM) TRNSMISSION ENGINE (TCM) (ECM) TO MOBILE 1 OF 5) SLIDING

Page 5 of 5 Fig 5: 6.6L VIN 6, Power Distribution Circuit (5 of 5) FROM DLIS 32 J 86 86 87 RUN/ CRNK WIPER SPEED WSH FUEL PMP CHMSL DEFOG TRLR LT STOP/TURN TRLR RT STOP/TURN BCK/UP PRK HI BEM HDLP LO/HID STRTR CMPRSR MISC ING 40 SEO/LC 51 37-52 ECM- 53 K FROM I/P I/P END OF J105 TKE UTO 4X4 & 4X4 G103 (ON FRONT OF CYLINDER HED) STOP SENSING & DIGNOSTIC (SDM) ON/ INDICTOR IR TEMPERTURE I/P DISBLE ( ) IR TEMPERTURE (MNUL ) RECIRCULTION MODE IR TEMPERTURE ( ) ENGINE (ECM) ( UX - 45 WIPER WPR 33 TRNS 1 13 FOG HORN EP 35 PWR/TRN SEO B1 49 DRL L/GTE FRT WSH O COMFORT & (IN JUMPER J220 PNK 7.5 HETED PRK ENBLE DJUSTBLE PEDLS I/P I/P COIL (IN SPO THEFT J227 SPO LRM INSTRUMENT PNEL CLUSTER (IPC) 275336 INSIDE VIEW MIRROR (ISRVM) HETED TRNSMISSION (TCM) FRONT DRIVE XLE SECURITY INDICTOR INCLINTION SHOCK TKE (PTO)