You may find this of interest in working
with your dealership. Have them refer to
GM bulletin #10-08-45-001 below:
Corroded or stripped electrical ground
connections can cause a loss of module
communication and other electrical
system malfunctions, leading to unnec-
essary repairs and parts replacement.
The electrical system relies on a secure,
corrosion-free ground connection in order
to function properly, so any damaged
ground connections must be repaired to
provide a good mounting point with a
low resistance ground path and prevent
future corrosion.
GM recently released a new bulletin
covering electrical ground connection
repairs. Refer to bulletin #10-08-45-001
for complete repair and installation
instructions. Here are the highlights.
The bulletin outlines ground repair
procedures using one of the following
replacement fasteners with a conductive
finish:
• Welded M6 stud and nut
• Welded M6 nut and bolt
• Welded M8 nut and bolt
Before installing a new fastener in the
current ground location or at a new
mounting location, remove any grease
from the repair area using a residue-free
solvent.
After drilling the mounting hole (for a
new location), remove any paint and
primer from the area until bare metal
is visible.
Install the appropriate new fastener
and check that it is securely fastened
without any detectable movement.
Cover the stud threads with protective
material and refinish the repair area
using an anti-corrosion primer.
TIP: The surrounding area must be
properly finished prior to the installation
of the ground wire terminal and conduc-
tive nut to maintain a secure, stable and
corrosion-free electrical ground.
Thoroughly clean the stud threads
using a residue-free solvent. Once dry,
apply dielectric lubricant to the threads to
reduce the possibility of fretting.
TIP: Fretting corrosion is a build-up of
insulating, oxidized wear debris than can
form when there is a
small motion between
electrical contacts,
causing electrical
resistance across the
connection.
Remove any corro-
sion or contamination
on the electrical
ground wire terminal.
Install the terminal,
tighten the conductive
nut to the proper
torque and verify
system operation.
Refer to the bulletin
for a list of part
numbers for the
replacement fasteners
and special tools.
