Chevrolet Silverado / GMC Sierra. Service manual — part 1308
Fig. 144: Drilling Plug Weld Holes
Courtesy of GENERAL MOTORS CORP.
1. Drill 8 mm (5/16 in) plug weld holes in the service part as necessary in the locations noted from the
original panel.
2. Prepare all attachment surfaces as necessary.
3. Prepare all mating surfaces as necessary.
4. Apply GM-approved Weld-Thru Coating or equivalent to all mating surfaces. Refer to Anti-Corrosion
Treatment and Repair .
5. Position the service part. Clamp in place.
IMPORTANT: If the location of the original plug weld holes can not be determined,
space the plug weld holes every 40 mm (1 1/2 in) apart. Where structural
adhesive was present, space the plug weld holes every 20 mm (3/4 in)
apart.
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Collision Repair - - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 145: View Of Plug Welding
Courtesy of GENERAL MOTORS CORP.
6. Plug weld accordingly.
7. Clean and prepare all welded surfaces.
8. Apply the sealers and anti-corrosion materials to the repair area, as necessary. Refer to Anti-Corrosion
Treatment and Repair .
9. Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems .
10. Install all related panels and components.
11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection
(w/Single Battery) or Battery Negative Cable Disconnection and Connection (w/Auxiliary Battery)
or Battery Negative Cable Disconnection and Connection (w/Dual Batteries) .
12. Enable the SIR system. Refer to SIR Disabling and Enabling .
DESCRIPTION AND OPERATION
METAL PANEL BONDING
This is intended to provide general guidelines for adhesive bonding of exterior panels as an alternative to Metal-
Inert Gas (MIG) welding. Panel bonding may be seen as an alternative to MIG welding to provide full panel
replacement in regards to collision repair procedures. The benefits of panel bonding is:
No heat or burn damage when additional welding is not required
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Collision Repair - - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Corrosion protection
Can act as a sealant
Improved process for complicated shapes (wheelhouse area)
The General Motors specification for metal bonding adhesives is GM 6449G. The scope of this specification is
intended to provide the performance guidelines of structural adhesive systems used to repair (metallic)
automotive bodies in the aftermarket. These types of adhesives are intended for use when bonding replacement
body panels as an option to welding as the attachment means. GM information outlines the use of room
temperature cure acrylic adhesives that contain glass bead technology.
Bonding procedures in general are applicable only to a factory seams type approach.
Sectioning or partial paneling of full panels is not supported by General Motors unless specifically documented
in a Service Bulletin or Manual.
Applicable components for this technology are EXTERIOR PANELS ONLY, including door skins, tail panels,
roof outer panels and quarter panels.
Adhesives currently meeting the performance requirements include General Motors materials and products
manufactured by Lord Adhesives. At this time, ONLY the adhesive products listed below meet this guideline:
IMPORTANT: Do not use adhesives for vehicle underbody or upper body structure type
repairs such as structural rails, shock/strut towers, floor pans, upper fender
rails, body side pillars, door rings-side or rear, rocker panels, unless
specifically documented in a GM Service Bulletin or Manual. If in doubt, use
only the procedures referenced in the Service Manual for the specific vehicle
being repaired.
Always follow the system manufacturer's instructions for application, handling,
and curing.
Manufacturer and Part Number
Description
GM P/N 12378566 (US)
Fast Set Panel Bonding Adhesive
GM P/N 88901674 (Canada)
Lord Fusor P/N 110B/111B
GM P/N 12378567 (US)
Medium Set Panel Bonding Adhesive
GM P/N 88901675 (Canada)
Lord Fusor P/N 108B/109B
3M P/N 8116
Panel Bonding Adhesive
Ashland Plio Grip Panel 60
Panel Bonding Adhesive
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Collision Repair - - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
2008 ENGINE
Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
SCHEMATIC AND ROUTING DIAGRAMS
CRUISE CONTROL SCHEMATICS
Fig. 1: Cruise Control Schematic
Courtesy of GENERAL MOTORS CORP.
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC CODE INDEX
DIAGNOSTIC CODE INDEX
DTC
Description
DTC B3794
B3794 08: Cruise Control Function Request Circuit Signal
Invalid
B3794 61: Cruise Control Function Request Circuit Actuator
2008 Chevrolet Silverado 1500
2008 ENGINE Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
2008 Chevrolet Silverado 1500
2008 ENGINE Cruise Control - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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