Incorrect Fuel Gauge Readings - Reprogram VCM (99-08-49-004)

Publication date: 1999-03-01
Reference number: 99-08-49-004

INCORRECT FUEL GAUGE READINGS - REPROGRAM VCM

TECHNICAL SERVICE BULLETIN

Reference Number(s): 99-08-49-004, Date of Issue: March, 1999

INCORRECT FUEL GAUGE READINGS (REPROGRAM VEHICLE CONTROL MODULE WITH REVISED CALIBRATION)

Model(s): 1998-99 Chevrolet and GMC S/T Pickup and 2 Door Utility Models with 4.3L Engine (VINs W, X - RPOs L35, LF6) *RPO ZN4 Only

1998-99 Isuzu Hombre with 4.3L Engine (VINs W, X - RPOs L35, LF6) *RPO ZN4 Only

Section: 08 - Body and Accessories

Bulletin No.: 99-08-49-004

Date: March, 1999

VEHICLES AFFECTED

1998*-99 Chevrolet and GMC S/T Pickup and 2 Door Utility Models & 1998*-99 Isuzu Hombre with 4.3L Engine (VINs W, X - RPOs L35, LF6) *RPO ZN4 Only Built Prior to the Following VIN Breakpoints:

BUILT PRIOR TO THE FOLLOWING VIN BREAKPOINTS

Plant	Division	VIN Breakpoint
Linden	Chevrolet (Pickup)	XK162356
Linden	Chevrolet (Blazer)	XK162355
Linden	GMC (Pickup)	XK508493
Linden	GMC (Jimmy)	XK508505
Shreveport	Chevrolet	X8140835
Shreveport	GMC	X8512385
Shreveport	Isuzu (RPO ZN4)	W8668201 - W8670669
Shreveport	Isuzu	X8650007 - X8650733

CONDITION

Some owners may comment on incorrect fuel gauge readings.

The fuel gauge may read empty (E) with approximately 1/3 of a tank of fuel remaining, or the fuel gauge rarely reaches the full (F) mark when the fuel tank is filled.

CORRECTION

Reprogram the vehicle control module (VCM) with the revised Fuel System Calibration. Use the appropriate calibration listed below. Refer to the latest Techline information for programming procedures.

CALIBRATION INFORMATION

Calibration P/N (New)	Application
09374032 (Fuel System Calibration)	S/T 100 (Pickup) & LF6/L35
09374033 (Fuel System Calibration)	S/T 100 (2 Door Utility) & L35

NOTE: These calibrations are not available from GMSPO. These calibrations are available on 1999 Techline CD ROM Disc 5 and later.

WARRANTY INFORMATION

For vehicle repaired under warranty, use:

WARRANTY INFORMATION

Labor Operation	Description	Labor Time
J6355	Prom - Reprogramming (On Car)	Use published labor time