Temperature Gauge - False Indicated Overheat Condition

Number: 87-162

Section: 8B

Date: JUNE, 1987
Subject: INDICATED OVERHEAT CONDITION 5.7L, (LM1)

AND OPTIONAL DASH MOUNTED GAGE PACKAGE (7Z4)


Model and Year: 1987 POLICE CARS EQUIPPED WITH FEDERAL EMISSIONS (NA5)
TO: ALL CHEVROLET DEALERS


Some police vehicles equipped with the 5.7L (LM1) engine and gage package (7Z4) having VIN numbers prior to those listed below, may exhibit a false indicated overheat condition on the gage.

VIN numbers which may be affected are those prior to:

Plant Code VIN Number

Clark St. 9 160551
Lakewood A 100139

This condition may be repaired by relocating the gage sensor from its current location in the right hand cylinder head to the left hand cylinder head where the engine "Hot" light switch is currently located. The existing wire to the gage sensor must also be rerouted to the new location. The existing "Hot" light switch may be relocated to the previous gage sensor location as a plug. The current "Hot" light electrical connector should be taped back.