2005 Chevrolet Tahoe 4WD V8-5.3L VIN TFACTORY OEM SERVICE PROCEDURE

Body Wiring Harness Junction Block Replacement



BODY WIRING HARNESS JUNCTION BLOCK REPLACEMENT

REMOVAL PROCEDURE
1. Remove the cover retaining nut.
2. Remove the cover by pushing in the tabs.

Factory service manual diagram



3. Remove the harness from the front of the junction block.

Factory service manual diagram



4. Remove the junction block from the bracket by pressing to release the tabs.
5. Remove the junction block in order to gain access to the rear of the block to remove the retaining bolts.
6. Remove the retaining bolts.
7. Separate the wire harness block from the junction block by inserting a screw driver in between.
8. Remove the junction block from the vehicle.

INSTALLATION PROCEDURE
1. Install the wire harness block to the junction block.
2. Install the retaining bolts.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the bolts to 6 N.m (53 lb in).

3. Install the junction block to the bracket.

Factory service manual diagram



4. Push on the top part until it clicks in place.
5. Connect the harness to the front of the junction block.

Factory service manual diagram



6. Install the cover to the junction block until it clicks in place.
7. Hand tighten the retaining nut until seated.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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