DeVille V8-273 4.5L (1989)
Harsh upshifts for ALL GEARS at high altitudes may be caused by high line pressure due to low engine vacuum. This condition may be corrected on
certain transaxle models by installing the appropriate aneroid modulator Service Package.
Based on vehicle applications each package contains:
(1)
Vacuum Modulator Assembly
(1)
Modulator Valve
(1)
O-Ring Seal
(1)
Spacer Plate
(5)
Gaskets
(1)
Cup Plug (Orificed)
(2)
Instruction Sheets
Parts are currently available from GMSPO.
A new vacuum fine from the engine to the vacuum modulator MUST also be installed when using the service packages listed previously
P/N
Vehicle Application
1643771
DeVilles and Fleetwoods
1641441
Eldorados and Sevilles
Parts are currently available from GMSPO.
Please refer to appropriate Labor Operations for applicable years.
