Engine - Cranks But Will Not Start

FILE IN SECTION: 6E - Engine Fuel & Emission

BULLETIN NO.: 53-63-02

DATE: June, 1995

SUBJECT: Engine Cranks But Will Not Start - No Fuel Pressure (Replace Module Fuel Level Sender and Jumper Harness)

MODELS: 1994-95 Cadillac Concours, DeVille, Eldorado, Seville
with 4.6L, 4.9L Engine (VINs 9, Y, B - RPOs L37, LD8, L26)

VIN BREAKPOINTS:

Models 1994 - Built After 1995 - Built Prior To
Concours RU286112 SU261519
DeVille RU286106 SU261512
Eldorado RU619245 SU612148
Seville RU836054 SU818790

CONDITION

Some owners may comment that engine will crank but won't start - no fuel pressure.

CAUSE

A bent or damaged terminal in cavity "C" of the jumper harness from the main body harness to the modular fuel sender could produce a high resistance circuit. This may lead to an intermittent open in the modular fuel sender ground circuit.

CORRECTION

Perform visual inspection of the sender cover to verify that no damage has occurred to the cover. When the above symptom is present, verify the condition by checking the fuel system pressure loss. Refer to diagnostics in Section 6C of the appropriate Service Manual.

If diagnosis indicates fuel pressure loss, a possible cause is damage to the modular fuel level sender wiring or damage to the jumper harness terminal. If the sender pass-through connector shows signs of damage, replace the jumper harness as well as the modular fuel sender.

PARTS INFORMATION

Part Number Description
25029982 Modular Fuel Level Sender
12107779 Jumper Harness

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

For vehicles repaired under warranty, use:

Labor
Operation Labor Time
L1200 Use published labor operation time.