Cadillac Escalade / Chevrolet Avalanche / Chevrolet Express 2007 thru 2009, wiring diagrams

Content

Overview

• Body control system description and operation
• Power mode description and operation
• Retained accessory power description and operation

Backup alarm / camera

• Backup alarm relay schematic
• Backup lamp schematic
• Chassis harness routing diagram
• Junction block - rear lamps
• Junction block - rear lamps X1
• Junction block - rear lamps X2

Battery isolator

• Medium duty battery isolator schematic

Auxiliary battery schematic

Battery / ignition ground feeds

• Installation of electrical aftermarket accessories-battery, ignition and ground feeds

Electrical charging system description and operation

Engine idle up

• Elevated idle / PTO / high idle are all different options
• Adding PTO option to A vehicle without (PTO)

Immobilizer

Lighting

• Forward
• Components
• Harness routing
• Headlamp connector views
• Headlamp replacement.
• Bulb replacement
• Rearward
• Separate stop / turn
• CHMSL
• Dome lamp
• Snow plow (VYU)
• Roof beacon (TRW)

Park neutral

Remote start / stop

Trailer brake

• Description and operation
• Trailer brake control schematics
• Trailer connector schematics
• Rear frame and underbody components
• Aftermarket procedure

Fuse block detail

• Fuse block - underhood label
• Fuse block - underhood top view - diesel
• Fuse block - underhood top view - gas
• Fuse block - underhood bottom view
• Fuse block - underhood X1
• Fuse block - underhood X2
• Fuse block - underhood X3
• Fuse block - underhood X4
• Fuse block - underhood
• Fuse block - underhood X6
• Fuse block - underhood X7 (except TP2)
• Fuse block - underhood X7 (TP2)
• Fuse block - underhood X8 (except JL1)
• Fuse block - underhood X8 (JL1)
• Fuse block - I/P label
• Fuse block - I/P top view
• Fuse block - I/P bottom view
• Fuse block - I/P X1
• Fuse block - I/P X2 (except MEX)
• Fuse block - I/P X3
• Fuse block - I/P X4
• Fuse block - auxiliary (HP2) label
• Fuse block - auxiliary (HP2) top view
• Fuse block - auxiliary (HP2) bottom view
• Fuse block - auxiliary X1 (HP2)
• Fuse block - auxiliary X2 (HP2)
• Fuse block - auxiliary X3 (HP2)
• Fuse block - auxiliary X4 (HP2)
• fuse block - auxiliary fuse holder (HP2)
• Fuse block - mobile radio device usage (9L4)
• Fuse block - mobile radio top view (9L4)
• Fuse block - mobile radio (9L4)
• Fuse holder, device usage (gas)
• Fuse holder, device usage (diesel)
• Fuse holder X1 (gas except 9L4)
• Fuse holder X1 (diesel or gas with 9L4)
• Fuse holder X2 (gas with TP2)
• Fuse holder X2 (diesel or gas except LU3)
• Fuse holder X2 (LU3)
• Fuse holder X2 (gas except LU3)
• Fuse holder X2 (diesel)
• Fuse holder X3 (9L4)
• Fuse holder X3 (diesel)
• Fuse holder X4 (TP2)
• Fuse holder X4 (diesel)
• Fuse holder X4 (diesel with K76 or YF2)

Junction block detail

• Junction block - left I/P, label
• Junction block - left I/P, top view
• Junction block - left I/P, bottom view
• Junction block - left I/P X1 (except MEX)
• Junction block - left I/P X2 (except MEX)
• Junction block - left I/P X3 (except MEX)
• Junction block - left I/P X4 (except MEX)
• Junction block - left I/P X5 (SPO alarm or SPO heated seats)
• Junction block - left I/P X7 (JF4)
• Junction block - left I/P X8 (except MEX)
• Junction block - left I/P X9 (except MEX)
• Junction block - left I/P X10 (except MEX)
• Junction block - left I/P X11 (except MEX)
• Junction block - left I/P X12 (except MEX)
• Junction block - left I/P X13 (AN3)
• Junction block - left I/P X14 (5Y0, 5X7, 9L4 or SPO heated seats)
• Junction block - right I/P, top view
• Junction block - right I/P (wire entry)
• Junction block - right I/P X2
• Junction block - right I/P X3
• Junction block - right I/P X4
• Junction block - right I/P X5
• Junction block - right I/P X6
• Junction block - rear lamps
• Junction block - rear lamps X1
• Junction block - rear lamps X2
• Junction block - rear lamps X3
• Junction block - rear lamps X4

Body control module (BCM)

• Body control module (BCM) X1
• Blower motor control module (BCM) X2
• Body control module (BCM) X2
• Body control module (BCM) X3
• Body control module (BCM) X4
• Body control module (BCM) X5
• Body control module (BCM) X6
• Body control module (BCM) X7 (except MEX or A52)

Door inline harness connector end views

• Truck
• X500 left front door harness to body harness (YE9 or HP2, without AN3 or DL3)
• X502 left front door harness to body harness (ASF with AN3 or DL3, and except YE9)
• X501 left front door harness to body harness (YE9 or HP2, without AN3 or DL3)
• X600 Right front door harness to body harness (YE9 or HP2, without AN3 or DL3
• X601 right front door harness to body harness (ASF)
• X700 Body Harness to Left Rear Door Harness (Crew Cab)
• X700 left rear door harness to body harness (extended cab)
• X800 body harness to right rear door harness (crew cab)
• X800 right rear door harness to body harness (extended cab)
• SUV X500 driver door harness to body harness (ASF)
• X600 passenger door harness to body harness (ASF)
• X700 body harness to left rear door harness
• X800 body harness to right rear door harness

Engine control module (ECM)

• Engine control module (ECM) X1 (diesel)
• Engine control module (ECM) X1 (HP2)
• Engine control module (ECM) X1 (L96)
• Engine control module (ECM) X1 (LU3)
• Engine control module (ECM) X1 (LY2, LMG, LC9, LY5, LH6, L76 or L9H)
• Engine control module (ECM) X1 (LY6)
• Engine control module (ECM) X2 (Diesel)
• Engine control module (ECM) X2 (HP2)
• Engine control module (ECM) X2 (L96)
• Engine control module (ECM) X2 (LMG, LC9, LY5, LH6, L76, or L9H without Y91)
• Engine control module (ECM) X2 (LU3)
• Engine control module (ECM) X2 (LY2, LY6, or L9H with Y91)
• Engine control module (ECM) X3 (diesel)
• Engine control module (ECM) X3 (HP2)
• Engine control module (ECM) X3 (L96)

Transmission control module (TCM)

• Transmission control module (TCM) (M30)
• Transmission control module (TCM) (MW7)

Radio

• Radio X1 (except Y91)
• Radio X1 (Y91 or 8S8)
• Radio X2 (except Y91 or 8S8)
• Radio X2 (Y91 or 8S8)
• Radio X3 (U42)
• Radio X4 (UUL or UUK)

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