ROUGH RUNNING OR STALLING. Chevrolet Chevy Suburban

SUBJECT: ROUGH RUNNING OR STALLING IMMEDIATELY AFTER START (INSTALL PROM)

MODELS: 1995 C/K CHEVROLET AND GMC C/K TRUCKS WITH 6.5L ENGINE (VIN S - RPO L56) WITH AUTOMATIC TRANSMISSION

CONDITION:

SOME OWNERS MAY EXPERIENCE A ROUGH RUNNING, OR STALLING IMMEDIATELY AFTER START.

CAUSE:

THE PREVIOUS CALIBRATION DID NOT OPTIMIZE ENGINE STARTING AT ALL COOLANT TEMPERATURES.

CORRECTION:

1. IF NO DTC'S ARE SET, REFER TO SECTION 2 IN THE SERVICE MANUAL FOR DRIVEABILITY SYMPTOMS. IF DTC'S ARE SET, REFER TO THE CHART IN THE SERVICE MANUAL FOR THE CODE.

2. CHECK PROM ID USING TECH 1.

3. INSTALL PROM FROM TABLE LISTED BELOW IF IT IS NOT CURRENTLY IN TRUCK.

BODY STYLE SERIES PROM ID PART NUMBER PICKUP C10 7135 16227149 PICKUP, C20, K10, K20 7145 16227152 BLAZER, OR YUKON

WARRANTY INFORMATION

LABOR LABOR TIME OPERATION J6364 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.