DTC'S 84 & 99 WHEN IGNITION KEY CYCLED OFF. Chevrolet Tahoe

SUBJECT: DTC'S 84 AND 99 WHEN IGNITION KEY CYCLED OFF WITH BRAKE PEDAL APPLIED (CLEAR DTC(S) WITH TECH 1 SCANNER)

MODELS: 1994-95 CHEVROLET AND GMC TRUCK C/K MODELS, G VAN, P MOTORHOME WITH 6.5L ENGINE (VINS F, S, P - RPOS L65, L56, L49)

CONDITION:

(ENGINE MUST BE RUNNING) A DTC 84 OR DTC'S 84 AND 99 MAY SET WHEN THE IGNITION KEY IS CYCLED OFF WITH THE BRAKE PEDAL APPLIED AND THE IGNITION KEY IS CYCLED BACK ON WITHIN 25 SECONDS. THE TECH 1 SCANNER WILL INDICATE THE DIAGNOSTIC TROUBLE CODES STORED IN HISTORY. THESE DTC'S MAY SUGGEST TO A TECHNICIAN THAT THE APP IS FAULTY AND UNNECESSARILY REPLACE THE APP MODULE.

CAUSE:

THE CALIBRATION IS PROGRAMMED TO SET THE DIAGNOSTIC TROUBLE CODES WHEN THE IGNITION IS SHUT OFF WITH THE BRAKE PEDAL APPLIED.

CORRECTION:

AFTER FOLLOWING THE DIAGNOSTIC CHARTS IN THE SERVICE MANUAL FOR DTC 84 AND/OR DTC 99 AND THERE IS NOT A PROBLEM FOUND, CLEAR THE DTC OR DTC'S WITH THE TECH 1 SCANNER.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION: J9995 LABOR TIME: USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0 ATTACHMENTS: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.