DeVille V6-260 4.3L DSL (1985)
Body Control Module: Customer Interest
Fuel - Incomplete Fuel Fill
Bulletin No.T
85-22
File In Group
6C
Number
90
Date
Nov. '84
SUBJECT:
INCOMPLETE FUEL FILL
MODELS AFFECTED: 1985 FWD DEVILLE AND FLEETWOOD
Some 1985 FWD Deville and Fleetwood owners may experience what appears to be an incomplete fuel fill or inaccurate fuel gauge reading. As
published in the Owner's Manual, the nominal capacity of the fuel tank is 18.0 gallons, whereas the actual fill levels being experienced are approximately
16.6 gallons. The digital fuel gauge displays "F" only when the actual fuel level is 16.6 gallons or more. Consequently, the fuel gauge may never indicate
"F" or will indicate "F", but will drop to 16 gallons in a very short time.
A two-step production change is being implemented to affect fuel gauge calibration and assure the usable 18.0 gallon fuel capacity. These changes are as
follows:
1.
A BCM PROM change, effective at B.P. 204626, was made to provide a revised fuel gauge calibration. As revised, the fuel gauge display will
show an "F" until the fuel level drops to 15.5 gallons at which time 15 gallons will be displayed. This BCM PROM (PROM I.D. 11, Broadcast
Code DDM) is available through GMWDD as service P/N 16040601.
2.
Effective at B.P. 237516, a production change will be made to the fuel tank vent tube in order to allow approximately 18 gallons customer fill.
There will be NO service modification to existing tanks to increase usable fuel capacity. Should a replacement gas tank be required, the revised
tank with a usable capacity of approximately 18 gallons can be obtained as service P/N 22529319.