GM Service Manual Online
For 1990-2009 cars only

Object Number: 95570  Size: SH

Repair procedures for plastics will vary depending on the type of plastic. In order to identify the type of plastic, 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 Chart of Plastic Parts Identification, Refinishing .
    • Identify any special handling procedures. Refer to Handling Precautions For Plastic .

Do not use a plastic burn test in order to distinguish the types of plastics. The burn test produces vapors that are harmful to you.

No Code Found

    • Type the plastic part as thermoplastic if the part has the following characteristics:
       - Heat sensitive
       - Will burn
       - Solvent sensitive
    • Type the plastic as thermoset plastic if the part has the following characteristics:
       - Not sensitive to heat
       - Will not melt
       - Will smolder rather than flame up
       - Normally not solvent sensitive

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 two 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 .