PROM Update - Engine Surge
88chevy16Number: REISSUE 88-162-6E
Section: 6E
Date: AUG., 1988
Subject DRIVEABILITY - ENGINE SURGE
(NEW SERVICE PROMS)
Model and Year 1987-88 C/K/R/V TRUCKS WITH 7.4L
(VIN CODE N) ENGINES
TO: ALL CHEVROLET DEALERS
Chevrolet Dealer Service Bulletin 88-162-6E, dated March, 1988 is being reissued to include a new PROM for automatic transmission equipped vehicles. All copies of 88-162-6E, dated March, 1988 should be discarded.
Some 1987-88 C, K, R and V trucks with 7.4L engines may experience customer comments of engine surge. If the condition described cannot be repaired using normal service procedures, a revised calibration PROM should be installed (see chart).
Parts are expected to be available on August 15, 1988. Until then normal part orders will not be accepted by GMSPO. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the parts will be shipped premium transportation at dealer's expense. All other order types will be cancelled as incorrectly ordered while the 400 control is in place.
After the PROM change, if surge is still present, refer to Dealer Service Bulletin 88-195-6E, dated April, 1988, for MAP sensor repositioning.
Use applicable Labor Operation and Time.