For 1990-2009 cars only
Engine Runs Hot, Overheats, Loss of Coolant (Polish Filler Neck/Replace Radiator Cap)
| Subject: | Engine Running Hot, Overheating and/or Loss of Coolant (Polish Radiator Filler Neck and Replace Radiator Cap) |
| Models: | 1999-2000 Passenger Cars and Trucks |
| with Composite Radiator End Tank |
Condition
Some customers may comment on one or more of the following conditions:
| • | Engine running hot |
| • | Engine overheating, and/or |
| • | Loss of coolant/low coolant message |
Cause
The radiator filler neck may have an imperfection in the sealing surface.
Correction
Important: DO NOT REPLACE THE RADIATOR.
Using a piece of 400 grit wet/dry sandpaper backed with a flat piece of wood, polish the filler neck sealing surface using a circular motion.
Replace the radiator pressure cap with a cap of the same part number as shown in the GM Service Parts Catalog.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
J3020 | Cap, Radiator Filler - Replace | 0.2 hr |
