K 2500 Truck 4WD V8-350 5.7L VIN K TBI (1995)
Fuel Pressure Pulsation Damper: All Technical Service Bulletins
Engine - Hard Start or No Start
File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 66-63-09
Date: April, 1997
Subject:
Engine Hard Start or No Start
(Replace Fuel Pump Pulsator)
Models:
1992-96 Chevrolet and GMC Trucks
1992-96 Oldsmobile Bravada with Gasoline Engines
Condition
Some owners may report their engine is hard to start or will not start.
Cause
The fuel delivery system may have low or no pressure due to a ruptured fuel pump pulsator The pulsator is the flexible connector between the fuel pump
and the metal fuel line in the tank. This rupture appears as a tear in the pulsator openings and is the result of exposure to gasoline containing a high
percentage of ethanol.
Correction
Follow the Strategy Based Diagnostic Steps for the reported symptoms. If diagnosis reveals low or no fuel system pressure, and the fuel pump is
identified as a possible cause, follow the service procedure for, On-Vehicle Service, Fuel Pump, in the appropriate Truck Service Manual. Before
replacing the fuel pump, inspect the pulsator for signs of tears or leaks It the pulsator is damaged, replace it with P/N 25175836 and re-test the fuel
system for normal pressure. This pulsator is made of Viton which is resistant to Ethanol content fuels. P/N 25175836 replaces P/N 25094266 for trucks.
This change will appear in GMSPO parts catalogs as they are revised.
Part Information
P/N
Description
QTY
25175836
Damper Asm - Fuel Pulsator
1
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use the table.
Labor Op
Description
Labor Time
J 5590
Pump, Fuel R&R
Use Published Labor
Time
Important:
Labor operation is coded to base vehicle coverage in the warranty system.