SER. MAN. UPDATE SEC. 6E1 DRIVEABILITY/EMISSIONS. Chevrolet Caprice 1987

THIS BULLETIN SERVES TO REVISE INFORMATION FOUND IN THE 1987-1988 5.0L (VIN G/H) AND 5.7L (VIN 6) "B" AND "F" CARLINE SERVICE MANUALS, "DRIVEABILITY AND EMISSIONS" SECTION 6E1. SOME DIAGNOSTIC STEPS REQUIRE MONITORING DWELL FOR A VALUE ABOVE 50 DEGREES. THIS VALUE SHOULD NOT BE USED SINCE THE ECM LIMITS DWELL TO A MAXIMUM OF 45 DEGREES. WHEN PERFORMING DIAGNOSTIC CHECKS USING THE FOLLOWING CHARTS, REPLACE THE 50 DEGREE DWELL VALUE WITH 45 DEGREES.

"SYSTEM PERFORMANCE CHECK" "CHART A-1" (DWELL FIXED UNDER 10 DEGREES) "CHART A-2" (DWELL FIXED BETWEEN 11-50 DEGREES) "CHART A-3" (DWELL FIXED OVER 50 DEGREES) "CODE 44" (LEAN EXHAUST INDICATED) "CODE 45" (RICH EXHAUST INDICATED)

DISCLAIMER

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.