Chevrolet Silverado / GMC Sierra. Service manual — part 2688

Look for the SAE code stamped into the part.

Code Found

Match the code to those in the plastic identification chart to determine whether the plastic is thermoplastic or
thermoset plastic, and whether the plastic is rigid or flexible. Refer to Plastic Identification and Refinishing
Systems.

No Code Found

Perform one or both of the following tests to determine if the part is thermoplastic polyolefin or thermoset non-
polyolefin.

Float Test

1. Cut a shaving of plastic from the back of the part.

The shaving should be free of mold release agents and paint.

2. Place the shaving in a container of water.



Thermoplastic polyolefin floats.



Thermoset non-polyolefin sinks.

Abrasion Test



Sand a spot near the damaged area with Grade 36 Roloc Disc.



Thermoplastic polyolefin material melts or frays when sanded.



Thermoset non-polyolefin material sands cleanly.

Thermoplastic and thermoset plastics can be either rigid or flexible. Thermoplastic plastic parts are best repaired
with a hot iron plastic material-feed welder, but are usually replaced. Thermoset plastic can be repaired with
epoxy or other more rigid 2 package repair material.



For rigid thermoset repair materials, refer to Rigid Plastic Part Repair Materials.



For flexible thermoset repair materials, refer to Flexible Plastic Part Repair Materials.



For general repair instructions, refer to General Plastic Repair.

PLASTIC IDENTIFICATION AND REFINISHING SYSTEMS

CAUTION: Do NOT use a plastic burn test to distinguish the type of plastic. The burn

test produces vapors which are harmful.

Identifying

Symbol - Old

Chemical

Composition or

Plastic Family

Typical Area(s)

Where Part is

Examples of

Common/Trade

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Plastic Panel Information and Repair - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Symbol in ( )s

Name

Used

Names

Type of Plastic

ABS

Acrylonitrile/

Butadiene-Styrene

Armrest Support,

Console, IPC,

Steering Column

Bracket/Jacket,

Trim Molding

ABS, Absafil,

Magnum, Cycolac,

Dyel, Kralastic,

Lustran

Thermoplastic

ABS + PC

Acrylonitrile/

Butadiene-Styrene +

Polycarbonate

Instrument Panel,

IPC

Bayblend, Cycoloy,

KHA, Pulse

Rigid

ABS/PVC

ABS/Vinyl (Soft)

Head Rest Cover,

Instrument Panel

Pad, Trim

Molding/Panel

ABS Vinyl

Flexible, Vinyl

EPDM

Ethylene Propylene

Diene Monomer

Body Panel,

Bumper Impact

Strip

EPDM, Nordel

Rigid

EVA (EVAC)

Ethylene/Vinyl

Acetate

Head Rest Cover,

Misc Soft Trim

Elvax, Microthane

Flexible

PA

Polyamide

Headlamp Bezels,

Quarter Panel

Extensions, Exterior

Finish Trim Panels

Nylon, Capron,

Zytel, Rilsan,

Minion, Vydyne,

Welland

Rigid

PA, PAG, PAGG

Polyamide

Exterior Finish

Trim Panel,

Headlamp Bezel,

Quarter Panel

Extension

Capron, Minlon,

Nylon, Rilsan,

Vydyne, Wellamid,

Zytel

Rigid, Thermoset

PA + PPE

Polymide +

Polypheneylene Ether

Exterior Trim,

Fender

GTX

Rigid, Thermoset

PBT + TEEE

(PBTP + EEBC)

Polybutylene,

Terephthalate +

Ether, Ester Block

Compound

Fascia, Rocker
Panel Molding

Bexloy M

Rigid

PC

Polycarbonate

Interior Rigid/Hard

Trim Panel, Valance

Panel

Calibre, Lexan,

Merlon, Makrolon

Rigid, Thermoset

PC + PETP

Polycarbonate +

Polybutylene,
Terephthalate

Bumper Fascia

Macroblend, Valox,

Xenoy

Flexible, Thermoset

PE

Polyethylene

Fuel Tank Shield,

Inner Fender Panel,

Interior Trim Panel,

Seat Belt Cover,

Spoiler, Valance

Alathon, Dylan,

Foriflex, Hi-fax,

Hosalen, Marlex,

Paxon

Rigid,

Thermoplastic

Amberol, Bakelite,

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Plastic Panel Information and Repair - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

PF

Phenol Formaldehyde

Ashtray

Durez, Genal,

Phenolic, Plyophen,

Resinox

Rigid, Thermoset

PP

Polypropylene

Bumper Fascia,

Cowl Panel,

Deflector Panel,

Door Panel, Inner

Fender, Interior

Molding, Kick

Panel, Load Floor,

Radiator Shroud,

Wheel Cover

Azdel, Daplen,

Escorene, Marlex,

Novolen, Oleflo,

Profax, Tenite

Flexible,

Thermoplastic

PPE (PPO)

Polyphenylene Ether

Bezels, Chromed

Plastic, Headlamp

Door, Ornaments

Noryl, Oleflo,

Prevex

Rigid, Thermoset

PS

Polystyrene

Dash Panel, Door

Panel

Durathon, Dylan,

Lustrex, Polystyrol,

Styron

Flexible, Soft

PUR

Polyurethane,

Thermoset

(Unsaturated)

Bumper Fascia,

Filler Panel,

Front/Rear Body

Panel, Pickup Box

Bayflex, Castethane,

RIM, RRIM, SRIM

Thermoset

PVC

Polyvinyl Chloride

(Vinyl)

Interior Soft Trim,

I/P Skins, Roof

Cover

Geon, Pliovic,

Unichem, Vinoflex,

Vinyl, Vinylite

Flexible, Vinyl

SAN (SA)

Styrene Acrylonitrite

Center Console,

Glove Box Door,

Interior Trim Panel

Foracryl, Lustran,

Tyril

Rigid

TEO (EP, EPM,

TPO)

Ethylene/Propylene

(Rubber)

Air Dam, Bumper

Fascia, Valance

Panel

EPI, EPII, TPO,

TPR (Thermoplastic

Rubber)

Flexible,

Thermoplastic

TPO

Thermal Plastic

Oletin

Bumper Covers

TPO

Flexible

Thermoplastic

TPU (TPUR)

Polyurethane,

Polyolefin

Bumper Fascia,

Gravel Deflector,

Soft Filler Panel,

Window Molding

Estane, Pellethane,

Roylar, Toxin

Flexible,

Thermoplastic

UP

Polyester/Thermoset

Air Scoop, Air
Spoiler, Fascia

Extension, Hood,

Instrument Housing,

Rear Compartment

Lid, Roof,

Ventilation Grid

Fiberglass, Premi-

glass, Selectron,

SMC, Vibrinmat

Rigid, Thermoset

For symbols not listed in this table, contact the Society of Automotive Engineers, 400 Commonwealth
Drive, Warrendale, PA 15096-0001.

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Plastic Panel Information and Repair - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

2008 ACCESSORIES & EQUIPMENT

Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

SPECIFICATIONS

FASTENER TIGHTENING SPECIFICATIONS

SCHEMATIC AND ROUTING DIAGRAMS

DRIVER SEAT SCHEMATICS

Fig. 1: 6-Way Power (-AN3)

Application

Specification

Metric

English

Front Memory Seat Switch Screw

2 N.m

18 lb in

Front Seat Cushion Frame Nut

9 N.m

80 lb in

Front Seat Recliner Motor Bolt

10 N.m

89 lb in

Memory Seat Module Nut

9 N.m

80 lb in

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado