Campaign - Incorrect Fuel Pump In Sender Unit: Overview

96065

Issued: 10/01/96

CAMPAIGN: INCORRECT FUEL PUMP IN SENDER UNIT

CUSTOMER SATISFACTION CAMPAIGN

SUBJECT:
96056 - INCORRECT FUEL PUMP IN SENDER UNIT

MODELS:
1996 4-DOOR 4.3L S/T UTILITIES BUILT AT LINDEN OR MORAINE

General Motors has decided that certain S/T 4-door Utility model vehicles may have been shipped with the incorrect fuel pump assembled in the fuel sending unit. With the incorrect fuel pump, which has a lower flow rate, the vehicle would exhibit hard starts in cold start situations and hard starts with lack of power at launch in hot start situations. These hard starts could be as long as 10-13 seconds and give the customer the impression of a "no start" condition. Additionally, in hot start situations, the "Service Engine Soon" light may illuminate and codes be set in the VCM.

To prevent the possibility of this condition occurring, dealers are to perform a test to determine that the correct fuel pump is installed, and replace the fuel pump if it is not.