C 2500 Truck 2WD V8-454 7.4L (1988)
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.
