S15/T15 Jimmy 2WD L4-119 1.9L VIN A 2-BBL (1983)
Coolant: Technical Service Bulletins
Engine Coolant - Usage
Number:
83-I-26
Section:
XIII
Date:
Dec., 1982
Subject:
ENGINE COOLANT USAGE IN 1983 VEHICLES
TO:
ALL CHEVROLET DEALERS
Chevrolet Motor Division has in past model years recommended use of ethylene glycol base anti-freeze that meets GM Specification 1899-M.
This recommendation has changed for 1982 and 1983 vehicles which are factory filled with coolant which meets GM 1825-M specifications.
It is required that any additions of coolant to these vehicles be done with GM 1825-M. This change was necessary due to the use of aluminum
components on some engines which required a different formulation of anti-freeze to prevent corrosion. This anti-freeze is available from
WDDGM in gallons and drums as P/N 1052753 and P/N 1052754.
This new coolant may be added to systems which contain anti-freeze meeting the GM 1899-M specifications with no adverse effect, but it is
recommended that when a complete draining of a cooling system is performed such as for engine repair, that it be refilled with one source
rather than mixing old anti-freeze with new as there may be slight differences in their chemical properties that could affect their overall
performance.
Procedures for mixing anti-freeze to water to obtain the required protection level are unchanged.
