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Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
The first thing that you want to do is check the cooling system for any exhaust gases. There is a tester for thas that you can gt from Autozone for about $20.
If there are any exhaust gases in the cooling system, that will cause more pressure than desired and will probably allow the engine to burn coolant.
If there are, then there would be an internal engine problem, like a head gasket or head. Of course, you will want to make sure that the system is full and the cooling fan(s) are working as well as the pressure cap holding pressure. Thanks
I found the one I think you are talking about. Here it is, see if that helps.
File In Section: 6 - Engine
Bulletin No.: 67-62-04
Date: December, 1996
Subject: Coolant Loss, Visible Coolant Leakage, Low Coolant Lamp On, or Coolant Odor, Caused by Coolant Leakage (Install a New Thermostat Gasket)
with 2.2L, 2.4L Engines (VINs 4, T - RPOs LN2, LD9)
Built before October, 1996
Some customers may comment about engine coolant loss, low coolant lamp on, visible coolant, or a coolant odor from the engine compartment. Some owners may be unable to distinguish the coolant from transmission fluid due to its orange color.
Some 1996 and 1997 J and N model cars equipped with 2.4 Liter (VIN Engine Code T RPO LD9) engines may exhibit coolant leakage at the joint where the radiator outlet pipe is connected to the coolant pump cover. In addition, some of these vehicles may exhibit leakage at the joint between the cooling system air bleed pipe and the coolant outlet. On 2.2 Liter engines (VIN Engine Code 4 - RPO LN2) coolant leakage may occur between the thermostat housing and the coolant inlet pipe.
On vehicles exhibiting leakage at the thermostat gasket joint, install a new thermostat gasket with part number 24576633, using procedures outlined in the Engine Cooling Section on the Service Manual.
In some instances of poor heater performance, 1995 91°C (195°F) thermostats have been installed in 1996 2.2L LN2 and 2.4L LD9 engines. The 1996 thermostat used for the inlet thermostat system is unique and cannot be replaced with a thermostat from an outlet side thermostat application.
If a 1995 91°C (195°F) thermostat is used to replace a 1996 82°C (180°F) thermostat, the following conditions WILL occur:
If any leakage is noted, replace the coolant outlet, GM P/N 24575259, air bleed pipe, GM P/N 24574205, and "0" ring seal, GM P/N 24573057. Use silicone based lubricant, GM P/N 12345579, when installing the new air bleed pipe and seal into the coolant outlet.