Manufacturer communication — 2006 GMC YUKON DENALI XL

• Applies to 2024 and earlier GM passenger cars and trucks, including medium duty and heavy duty.

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  Models: 2024 and Prior GM Passenger Cars and Trucks (Includes Medium Duty and Heavy Duty)

Possible causes

• Loose, stripped or corroded ground connections increase the possibility of improper system function and loss of module communication, and may lead to unnecessary repairs and component replacement.

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  Loose, stripped, or corroded connections increase the possibility of improper system function and loss of module communication. These conditions may also lead to unnecessary repairs and component replacement.

Repair

1. For a damaged or missing M6 ground stud, select an adjacent location with 20 mm (0.79 in) clearance behind the panel surface and 20 mm (0.79 in) clearance around the M6 conductive rivet stud flange.

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   Select a location adjacent the damaged or missing M6 ground stud having 20 mm (0.79 in) clearance behind the panel surface and 20 mm (0.79 in) clearance surrounding the M6 conductive rivet stud flange.

2. Drill a 10 mm (0.40 in) diameter hole through the panel.

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   Drill a 10 mm (0.40 in) diameter hole through the panel.

3. Remove paint and primer from the area around the 10 mm (0.40 in) hole until bare metal is visible.

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   Remove paint and primer from the area surrounding the 10 mm (0.40 in) hole until bare metal is visible.

4. Using a small brush, apply Dielectric Lubricant GM P/N 12377900 (Canadian P/N 10953529) to the threads of the M6 conductive rivet stud.

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   Using a small brush, apply Dielectric Lubricant GM P/N 12377900 (Canadian P/N 10953529) to the threads of the M6 conductive rivet stud.

5. Install the M6 conductive nut to the rivet stud and tighten to 71 lb in (= 8.02 N·m).

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   Install the M6 conductive nut to the rivet stud and: Tighten Tighten to 8 Y (71 lb in).

6. If the M6 weld nut at the ground location is damaged or stripped, a M7 conductive self-threading bolt may be used to secure the ground wire terminal.

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   If the M6 weld nut at the electrical ground location is damaged or stripped, a M7 conductive self-threading bolt may be used to secure the ground wire terminal.

7. Install the M7 conductive self-threading bolt and tighten to 80 lb in (= 9.04 N·m).

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   Install the M7 conductive self-threading bolt and: Tighten Tighten to 9 Y (80 lb in).

Parts

• Conductive-finish fasteners: 11561645 M6 nut, 11570340 M6 rivet stud, 11588564 M8 bolt, 11609412 M8 nut, 11609538 M7 bolt (self-threading), 11609669 M6 bolt.

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  11561645 M6 NUT 11570340 M6 RIVET STUD 11588564 M8 BOLT 11609412 M8 NUT 11609538 M7 BOLT (SELF-THREADING) 11609669 M6 BOLT

Caution

• Use only the GM-approved replacement fasteners with conductive finish for electrical ground repair.

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  Caution: Use only the GM-approved replacement fasteners with conductive finish for electrical ground repair.

• The rivet stud and surrounding panel area must be refinished before the ground wire terminal and conductive nut are installed, to keep the ground secure, stable and corrosion-free.

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  Note: The rivet stud and surrounding panel area MUST BE properly refinished PRIOR to the installation of the ground wire terminal and conductive nut to maintain a secure, stable and corrosion-free electrical ground.