Corsica V6-173 2.8L (1987)
Throttle Valve Cable/Linkage: All Technical Service Bulletins
A/T - Delayed/Harsh Upshifts
Number:
REISSUE 87-57
Section:
7A
Date:
JUNE, 1987
Subject: DELAYED, HARSH UPSHIFTS
Model and Year: 1987 BERETTA, CAVALIER, CELEBRITY, CORSICA WITH 2.8L MPFI V6 ENGINES AND AUTOMATIC TRANSAXLES
TO:
ALL CHEVROLET DEALERS
Dealer Service Bulletin 87-57 is being reissued to expand vehicle model involvement and a quick inspection procedure for identifying suspected throttle
bodies. All copies of Bulletin 87-57 (Section 7A) dated January, 1987 should be destroyed.
Some early built 1987 vehicles listed above with 2.8L V6 engines (VIN Code W) and THM 125C or 440-T4 automatic transaxles may exhibit delayed
and/or harsh upshifts.
After the condition has been verified, inspect the Throttle Valve (TV) cable for proper operation and adjustment. (Follow the T.V. cable adjustment
procedures contained in the "Automatic Transaxle Section" of the appropriate service Information Manual.) If the T.V. system is operating properly and
the condition still exists, it may be caused by insufficient travel of the throttle lever on the throttle body assembly.
Inspect the throttle lever for an identification hole in the location shown in the illustration. If the lever has a hole, continue following the diagnosis
covered in Automatic Transaxle section of the Service Manual. If the lever does not have a hole in it at the location shown, install a new throttle body
with a revised throttle lever. Throttle body service kits are as follows:
Celebrity
17111886
Beretta, Cavalier, Corsica
17111882
NOTICE:
THE SERVICE THROTTLE BODY KIT INCLUDES ONLY THE CORE THROTTLE BODY. IT DOES NOT INCLUDE THE
FOLLOWING PARTS, WHICH ARE AVAILABLE SEPARATELY:
