Full Size Chevrolet V8-350 5.7L DSL (1984)
Speedometer Head: Technical Service Bulletins
Instruments - Non-Repairable Police Speedometers
85-44
8C(XII)
FEB., 1985
Subject:
NON-REPAIRABLE POLICE SPEEDOMETERS
Model and Year:
1983-1985 IMPALA, CAPRICE AND CELEBRITY
TO:
ALL CHEVROLET DEALERS
This replaces Chevrolet Service Bulletin No. 84-37 which should be discarded.
Late in the 1983 model year, special police speedometers were released to retain calibration over a wide range of temperatures. These speedometers, and
those used in subsequent model years, will not be repairable.
The special police speedometers released to date are listed below:
Part No.
Application
25076605
1983-4 Impala, Caprice - U.S. - 3 spd
25077842
1983-4 Impala, Caprice - U.S. - 4 spd
25076129
1984-5 Celebrity - U.S.
25076130
1984-5 Celebrity - Canadian
25078352
1985 Impala, Caprice - U.S.
25078353
1985 Impala, Caprice - Canadian
These speedometers must be replaced as assemblies, rather than repaired by components.
When replaced, the odometers should not be reset to actual vehicle mileage. (To do so would destroy calibration.) Stickers should be affixed to drivers'
doors indicating mileage at the time of speedometer replacement.