electrical

LED Headlight Module

for 2017 Chevrolet Silverado 1500 5.3L V8 EcoTec3 L83 · RWD

Difficulty

Moderate

Time

2.0 h

Tools

Steps

This procedure covers the removal and replacement of the LED headlight module on a 2014-2018 Chevrolet Silverado 1500 with 5.3L V8 engine.

Warnings

⚠Allow headlights to cool for at least 15 minutes before beginning work to avoid burns from hot LED heat sinks

⚠Do not touch LED module surfaces or reflectors with bare hands as oils can cause hot spots and premature failure

ℹ️LED headlight modules are sensitive to static discharge. Ground yourself before handling the module

ℹ️Some models require headlight aim adjustment after module replacement

Tools required

10mm socket and ratchetEssential

8mm socketEssential

Torque wrench (5-50 Nm range)Essential

Trim panel removal tool set

Extension setEssential

Flathead screwdriver

Clean cloth or rag

Parts

LED Headlight Module Assembly × 1 — Use OEM specification - GM 84109646 (left) or 84109647 (right)
Headlight Module Retaining Bolts (if damaged) × 4 — M8 x 1.25 bolts

Preparation

Park vehicle on level surface and turn off ignition
Open hood and secure with prop rod
Disconnect negative battery terminal and wait 2 minutes to allow systems to power down
Determine which headlight module needs replacement (driver or passenger side)
Verify replacement module matches original (LED type, part number compatibility)

Procedure

1
Disconnect Battery
Disconnect the negative battery cable using a 10mm socket. Tuck cable away from battery post to prevent accidental reconnection during the repair.
Torque spec
Battery Terminal Bolts6 Nm (4 lb-ft)
2
Access Headlight Assembly
Remove the front grille if additional clearance is needed. On most 2014-2018 Silverado models, headlight access is available without grille removal. Remove the radiator cover panel retaining screws if present to improve access to the headlight mounting points.
Torque spec
Cover Screws14 Nm (10 lb-ft)
3
Disconnect Headlight Electrical Connector
Locate the main headlight electrical connector behind the headlight assembly. Press the release tab and pull the connector straight back from the module. If equipped with daytime running light or side marker connectors, disconnect these as well by pressing their respective release tabs.
4
Remove Upper Mounting Bolts
Locate the two upper headlight module mounting bolts accessible from the top of the assembly. Use an 8mm socket with extension to remove these bolts. Keep bolts organized for reinstallation.
Torque spec
Module Mounting Bolts8 Nm (6 lb-ft)
5
Remove Lower Mounting Bolts
Access the lower mounting bolts from underneath the front bumper or through the wheel well area. Remove the two lower headlight module mounting bolts using an 8mm socket. On some models, turning the front wheels outward may improve access.
Torque spec
Module Mounting Bolts8 Nm (6 lb-ft)
6
Remove Headlight Module
With all mounting bolts removed, carefully pull the headlight module forward and out of the mounting position. The module may require slight rocking motion to disengage from alignment pins. Be careful not to scratch the module housing or surrounding body panels during removal.
7
Inspect Mounting Area
Clean the mounting surface and alignment pin holes of any debris, dirt, or corrosion. Inspect the wiring harness connector for corrosion, damage, or bent pins. Check that rubber seals and grommets in the mounting area are intact. Replace any damaged seals to prevent water intrusion.
8
Prepare New Module
Remove the new LED headlight module from protective packaging. Inspect the module for any shipping damage. Do not remove protective film from lens until after installation. Verify all mounting tabs and alignment pins are present and undamaged.
9
Install New Headlight Module
Position the new headlight module into the mounting location, aligning the module with the alignment pins in the body. Ensure the module seats fully into position before attempting to install mounting bolts. The module should sit flush with the surrounding body panels.
10
Install Mounting Bolts
Install all four mounting bolts (two upper, two lower) finger-tight first to ensure proper alignment. Then torque all mounting bolts in a cross pattern to specification using a torque wrench. Do not overtighten as this can crack the module housing.
Torque spec
Module Mounting Bolts8 Nm (6 lb-ft)
11
Reconnect Electrical Connectors
Reconnect the main headlight electrical connector by pushing it firmly into the module until it clicks. Reconnect any additional connectors for daytime running lights or side markers. Verify all connections are fully seated and locking tabs are engaged.
12
Reinstall Covers and Reconnect Battery
Reinstall any covers or panels removed during access. Reconnect the negative battery terminal and torque to specification. Do not overtighten the battery terminal bolt as this can damage the terminal.
Torque spec
Battery Terminal Bolts6 Nm (4 lb-ft)
Cover Screws14 Nm (10 lb-ft)

Reassembly

Ensure all electrical connectors are fully seated and locked
Verify headlight module is flush with body panels and properly aligned
Remove any protective film from headlight lens
Double-check that all mounting bolts are torqued to specification

Verification

Turn ignition to ON position and verify headlights illuminate properly in low and high beam modes
Test daytime running lights and turn signals if integrated into the headlight module
Check for any warning lights on the instrument cluster related to headlight malfunction
Verify headlight aim is correct - headlights should point straight ahead and slightly downward. Adjust aim if necessary using headlight aim adjustment screws
Test headlight cutoff pattern by parking 25 feet from a wall in a dark area - the beam should have a sharp horizontal cutoff
Inspect for any gaps between headlight module and body panels that could allow water intrusion